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  Plantae
      Magnoliophyta
         Eudicots
             Core Eudicots
               Asterids
               Campanulids
                    Asterales
                            Asteraceae
                                     Acamptopappus
                                             Acamptopappus shockleyi
                                             Acamptopappus sphaerocephalus
                                               Acamptopappus sphaerocephalus var. hirtellus
                                               Acamptopappus sphaerocephalus var. sphaerocephalus
                                     Acanthospermum
                                             Acanthospermum australe
                                                   [Acanthospermum xanthioides]
                                             Acanthospermum hispidum
                                             Acanthospermum humile
                                     Acanthoxanthium
                                             Acanthoxanthium spinosum
                                     Achaetogeron
                                     Achillea
                                             Achillea aegyptiaca
                                                   [Achillea taygetea]
                                             Achillea ageratifolia
                                             Achillea ageratum
                                             Achillea alpina
                                                   [Achillea multiflora]
                                                   [Achillea sibirica]
                                             Achillea biserrata
                                             Achillea cartilaginea
                                             Achillea chrysocoma
                                             Achillea clavennae
                                             Achillea clusiana
                                             Achillea clypeolata
                                             Achillea collina
                                             Achillea conferta
                                             Achillea crithmifolia
                                             Achillea distans
                                                   [Achillea dentifera]
                                               Achillea distans ssp. tanacetifolia
                                             Achillea erba-rotta
                                               Achillea erba-rotta ssp. rupestris
                                             Achillea filipendulina
                                             Achillea grandifolia
                                             Achillea impatiens
                                             Achillea lanulosa
                                             Achillea ligustica
                                             Achillea lingulata
                                             Achillea macrocephala
                                                   [Achillea ptarmica ssp. macrocephala]
                                             Achillea macrophylla
                                             Achillea millefolium
                                                   [Achillea alpicola]
                                                   [Achillea angustissima]
                                                   [Achillea arenicola]
                                                   [Achillea aspleniifolia]
                                                   [Achillea borealis ssp. arenicola]
                                                   [Achillea borealis ssp. californica]
                                                   [Achillea borealis ssp. typica]
                                                   [Achillea borealis var. arenicola]
                                                   [Achillea borealis var. californica]
                                                   [Achillea borealis]
                                                   [Achillea californica]
                                                   [Achillea eradiata]
                                                   [Achillea fusca]
                                                   [Achillea gigantea]
                                                   [Achillea gracilis]
                                                   [Achillea lanulosa ssp. alpicola]
                                                   [Achillea lanulosa ssp. megacephala]
                                                   [Achillea lanulosa ssp. typica]
                                                   [Achillea lanulosa var. alpicola]
                                                   [Achillea lanulosa var. arachnoidea]
                                                   [Achillea lanulosa var. eradiata]
                                                   [Achillea lanulosa]
                                                   [Achillea laxiflora]
                                                   [Achillea magna]
                                                   [Achillea megacephala]
                                                   [Achillea millefolium ssp. atrotegula]
                                                   [Achillea millefolium ssp. borealis]
                                                   [Achillea millefolium ssp. lanulosa]
                                                   [Achillea millefolium ssp. occidentalis]
                                                   [Achillea millefolium ssp. pallidotegula]
                                                   [Achillea millefolium var. alpicola]
                                                   [Achillea millefolium var. arenicola]
                                                   [Achillea millefolium var. aspleniifolia]
                                                   [Achillea millefolium var. borealis]
                                                   [Achillea millefolium var. californica]
                                                   [Achillea millefolium var. fulva]
                                                   [Achillea millefolium var. fusca]
                                                   [Achillea millefolium var. gigantea]
                                                   [Achillea millefolium var. gracilis]
                                                   [Achillea millefolium var. lanulosa]
                                                   [Achillea millefolium var. litoralis]
                                                   [Achillea millefolium var. maritima]
                                                   [Achillea millefolium var. megacephala]
                                                   [Achillea millefolium var. millefolium]
                                                   [Achillea millefolium var. nigrescens]
                                                   [Achillea millefolium var. occidentalis]
                                                   [Achillea millefolium var. pacifica]
                                                   [Achillea millefolium var. parviligula]
                                                   [Achillea millefolium var. parvula]
                                                   [Achillea millefolium var. puberula]
                                                   [Achillea millefolium var. rosea]
                                                   [Achillea millefolium var. russeolata]
                                                   [Achillea nigrescens]
                                                   [Achillea occidentalis]
                                                   [Achillea pacifica]
                                                   [Achillea puberula]
                                                   [Achillea rosea]
                                                   [Achillea subalpina]
                                                   [Achillea tomentosa]
                                             Achillea nobilis
                                             Achillea odorata
                                             Achillea pannonica
                                             Achillea ptarmica
                                             Achillea pyrenaica
                                             Achillea rupestris
                                             Achillea setacea
                                             Achillea tanacetifolia
                                             Achillea umbellata
                                     Achyrachaena
                                             Achyrachaena mollis
                                     Achyrophorus
                                     Acmella
                                             Acmella decumbens
                                                   [Spilanthes americana var. stolonifera]
                                                   [Spilanthes stolonifera]
                                             Acmella iodiscaea
                                                   [Spilanthes iodiscaea]
                                             Acmella oppositifolia
                                             Acmella pilosa
                                             Acmella pusilla
                                                   [Spilanthes pusilla]
                                             Acmella repens
                                                   [Acmella oppositifolia var. repens]
                                                   [Spilanthes americana var. repens]
                                                   [Spilanthes americana]
                                             Acmella uliginosa
                                                   [Spilanthes uliginosa]
                                                   [Spilanthes uligonosa]
                                     Acosta
                                             Acosta diffusa
                                             Acosta maculosa
                                             Acosta maculosa x diffusa
                                     Acourtia
                                             Acourtia formosa
                                             Acourtia microcephala
                                                   [Perezia microcephala]
                                             Acourtia nana
                                                   [Perezia nana]
                                             Acourtia runcinata
                                                   [Perezia runcinata]
                                             Acourtia thurberi
                                                   [Perezia thurberi]
                                             Acourtia wrightii
                                                   [Perezia wrightii]
                                     Acroclinium
                                             Acroclinium roseum
                                     Acroptilon
                                             Acroptilon repens
                                     Actinea
                                             Actinea richardsonii
                                     Actinella
                                             Actinella richardsonii
                                     Actinomeris
                                     Adenocaulon
                                             Adenocaulon bicolor
                                     Adenophyllum
                                             Adenophyllum cooperi
                                             Adenophyllum porophylloides
                                             Adenophyllum porophyllum
                                                   [Pteronia porophylla]
                                             Adenophyllum wrightii
                                                   [Hymenatherum neomexicanum]
                                     Adenostemma
                                             Adenostemma berteroi
                                                   [Adenostemma berterii]
                                             Adenostemma lanceolatum
                                             Adenostemma verbesina
                                                   [Cotula verbesina]
                                             Adenostemma viscosum
                                                   [Adenostemma lavenia]
                                                   [Verbesina lavenia]
                                     Agassizia
                                     Ageratina
                                             Ageratina adenophora
                                                   [Eupatorium adenophorum]
                                             Ageratina altissima
                                               Ageratina altissima var. altissima
                                                     [Ageratina altissima var. angustata]
                                                     [Ageratum altissimum]
                                                     [Eupatorium rugosum var. angustata]
                                                     [Eupatorium rugosum var. chlorolepis]
                                                     [Eupatorium rugosum var. tomentellum]
                                                     [Eupatorium rugosum var. villicaule]
                                                     [Eupatorium urticifolium var. tomentellum]
                                               Ageratina altissima var. roanensis
                                                     [Eupatorium rugosum var. roanense]
                                             Ageratina aromatica
                                                   [Ageratina aromatica var. aromatica]
                                                   [Eupatorium aromaticum]
                                                   [Eupatorium latidens]
                                             Ageratina havanensis
                                                   [Eupatorium havanense]
                                                   [Eupatorium texense]
                                             Ageratina herbacea
                                                   [Eupatorium herbaceum]
                                             Ageratina jucunda
                                                   [Ageratina aromatica var. incisa]
                                                   [Eupatorium aromaticum var. incisum]
                                                   [Eupatorium juncundum]
                                             Ageratina lemmonii
                                                   [Eupatorium lemmonii]
                                             Ageratina luciae-brauniae
                                                   [Eupatorium luciae-brauniae]
                                             Ageratina occidentalis
                                                   [Eupatorium occidentale]
                                             Ageratina paupercula
                                                   [Eupatorium pauperculum]
                                             Ageratina resiniflua
                                                   [Eupatorium resinifluum]
                                             Ageratina riparia
                                                   [Eupatorium riparium]
                                             Ageratina rothrockii
                                                   [Eupatorium rothrockii]
                                             Ageratina shastensis
                                                   [Eupatorium shastense]
                                             Ageratina thyrsiflora
                                             Ageratina wrightii
                                                   [Eupatorium wrightii]
                                     Ageratum
                                             Ageratum conyzoides
                                             Ageratum corymbosum
                                                   [Ageratum guatemalense]
                                             Ageratum domingense
                                             Ageratum houstonianum
                                             Ageratum maritimum
                                                   [Ageratum littorale]
                                     Agnorhiza
                                             Agnorhiza bolanderi
                                             Agnorhiza elata
                                             Agnorhiza invenusta
                                             Agnorhiza ovata
                                             Agnorhiza reticulata
                                     Agoseris
                                             Agoseris X agrestis
                                                   [Agoseris agrestis]
                                                   [Agoseris glauca var. agrestis]
                                             Agoseris X dasycarpa
                                             Agoseris X elata
                                                   [Agoseris elata]
                                                   [Agoseris laciniata]
                                                   [Stylopappus elatus]
                                             Agoseris apargioides
                                               Agoseris apargioides var. apargioides
                                                     [Troximon apargioides]
                                               Agoseris apargioides var. eastwoodiae
                                               Agoseris apargioides var. maritima
                                                     [Agoseris apargioides ssp. maritima]
                                             Agoseris aurantiaca
                                               Agoseris aurantiaca var. aurantiaca
                                                     [Agoseris gaspensis]
                                                     [Agoseris lackschewitzii]
                                                     [Troximon aurantiacum]
                                               Agoseris aurantiaca var. purpurea
                                                     [Agoseris arizonica]
                                                     [Agoseris aurantiaca ssp. purpurea]
                                                     [Agoseris glauca var. cronquistii]
                                                     [Agoseris graminifolia]
                                                     [Agoseris rostrata]
                                             Agoseris eastwoodiae
                                             Agoseris glauca
                                               Agoseris glauca var. agrestis
                                               Agoseris glauca var. dasycephala
                                                     [Agoseris glauca ssp. scorzonerifolia]
                                                     [Agoseris glauca var. asper]
                                                     [Agoseris glauca var. pumila]
                                                     [Agoseris scorzonerifolia]
                                                     [Agoseris turbinata]
                                                     [Troximon glaucum var. dasycephalum]
                                               Agoseris glauca var. glauca
                                                     [Troximon glaucum]
                                               Agoseris glauca var. laciniata
                                             Agoseris grandiflora
                                                   [Agoseris plebeja]
                                                   [Troximon grandiflorum]
                                               Agoseris grandiflora var. grandiflora
                                               Agoseris grandiflora var. leptophylla
                                             Agoseris heterophylla
                                               Agoseris heterophylla var. cryptopleura
                                                     [Agoseris heterophylla ssp. californica]
                                                     [Agoseris heterophylla var. crenulata]
                                                     [Agoseris heterophylla var. turgida]
                                               Agoseris heterophylla var. heterophylla
                                                     [Agoseris heterophylla ssp. normalis]
                                                     [Agoseris heterophylla var. kymapleura]
                                                     [Macrorhynchus heterophyllus]
                                               Agoseris heterophylla var. quentinii
                                             Agoseris hirsuta
                                             Agoseris maritima
                                             Agoseris monticola
                                                   [Agoseris glauca var. monticola]
                                             Agoseris parviflora
                                                   [Agoseris glauca var. laciniata]
                                                   [Agoseris glauca var. parviflora]
                                                   [Macrorhynchus glaucus var. laciniatus]
                                                   [Troximon parviflorum]
                                             Agoseris retrorsa
                                                   [Macrorhynchus retrorsus]
                                     Alcina
                                     Almutaster
                                             Almutaster pauciflorus
                                                   [Aster hydrophilus]
                                                   [Aster pauciflorus]
                                     Amauria
                                     Amauriopsis
                                             Amauriopsis dissecta
                                                   [Amauria dissecta]
                                     Amberboa
                                             Amberboa moschata
                                     Amblyolepis
                                             Amblyolepis setigera
                                     Amblyopappus
                                             Amblyopappus pusillus
                                     Ambrosia
                                             Ambrosia X helenae
                                             Ambrosia X intergradiens
                                             Ambrosia X platysperma
                                             Ambrosia acanthicarpa
                                                   [Franseria acanthicarpa]
                                                   [Gaertneria acanthicarpa]
                                             Ambrosia ambrosioides
                                                   [Franseria ambrosioides]
                                             Ambrosia artemisiifolia
                                                   [Ambrosia artemisiifolia var. artemisiifolia]
                                                   [Ambrosia artemisiifolia var. elatior]
                                                   [Ambrosia artemisiifolia var. paniculata]
                                                   [Ambrosia elatior]
                                                   [Ambrosia glandulosa]
                                                   [Ambrosia maritima]
                                                   [Ambrosia monophylla]
                                                   [Ambrosia paniculata]
                                               Ambrosia artemisiifolia var. elatior
                                             Ambrosia bidentata
                                             Ambrosia canescens
                                             Ambrosia chamissonis
                                                   [Ambrosia chamissonis var. bipinnatisecta]
                                                   [Franseria chamissonis ssp. bipinnatisecta]
                                                   [Franseria chamissonis var. bipinnatisecta]
                                                   [Franseria chamissonis]
                                             Ambrosia cheiranthifolia
                                             Ambrosia chenopodiifolia
                                                   [Franseria chenopodiifolia]
                                             Ambrosia confertiflora
                                                   [Franseria confertiflora]
                                                   [Franseria strigulosa]
                                                   [Gaertneria tenuifolia]
                                             Ambrosia cordifolia
                                                   [Franseria cordifolia]
                                             Ambrosia deltoidea
                                                   [Franseria deltoidea]
                                             Ambrosia dumosa
                                                   [Franseria dumosa]
                                             Ambrosia eriocentra
                                                   [Franseria eriocentra]
                                             Ambrosia grayi
                                                   [Gaertnera tomentosa]
                                                   [Gaertneria grayi]
                                             Ambrosia hispida
                                             Ambrosia ilicifolia
                                                   [Franseria ilicifolia]
                                             Ambrosia linearis
                                                   [Franseria linearis]
                                             Ambrosia monogyra
                                                   [Hymenoclea monogyla]
                                                   [Hymenoclea monogyra]
                                             Ambrosia peruviana
                                                   [Ambrosia paniculata var. peruviana]
                                             Ambrosia psilostachya
                                                   [Ambrosia californica]
                                                   [Ambrosia coronopifolia]
                                                   [Ambrosia cumanensis]
                                                   [Ambrosia psilostachya var. californica]
                                                   [Ambrosia psilostachya var. coronopifolia]
                                                   [Ambrosia psilostachya var. lindheimeriana]
                                                   [Ambrosia rugelii]
                                               Ambrosia psilostachya var. coronopifolia
                                             Ambrosia pumila
                                                   [Franseria pumila]
                                             Ambrosia salsola
                                                   [Ambrosia salsola var. fasciculata]
                                                   [Ambrosia salsola var. pentalepis]
                                                   [Ambrosia salsola var. salsola]
                                                   [Hymenoclea fasciculata]
                                                   [Hymenoclea pentalepis]
                                                   [Hymenoclea salsola var. fasciculata]
                                                   [Hymenoclea salsola var. patula]
                                                   [Hymenoclea salsola var. pentalepis]
                                                   [Hymenoclea salsola var. salsola]
                                                   [Hymenoclea salsola]
                                             Ambrosia sandersonii
                                             Ambrosia tenuifolia
                                             Ambrosia tomentosa
                                                   [Franseria discolor]
                                                   [Gaertneria discolor]
                                                   [Gaertneria tomentosa]
                                             Ambrosia trifida
                                                   [Ambrosia aptera]
                                                   [Ambrosia trifida var. aptera]
                                                   [Ambrosia trifida var. integrifolia]
                                                   [Ambrosia trifida var. texana]
                                                   [Ambrosia trifida var. trifida]
                                     Amellus
                                     Ammodia
                                     Ammopursus
                                     Ampelaster
                                             Ampelaster carolinianus
                                                   [Lasallea caroliniana]
                                     Amphiachyris
                                             Amphiachyris amoena
                                                   [Xanthocephalum amoenum]
                                             Amphiachyris dracunculoides
                                                   [Brachyris dracunculoides]
                                                   [Xanthocephalum amoenum var. intermedium]
                                                   [Xanthocephalum dracunculoides]
                                             Amphiachyris spinosa
                                     Amphipappus
                                             Amphipappus fremontii
                                               Amphipappus fremontii var. fremontii
                                                     [Amphipappus fremontii ssp. fremontii]
                                               Amphipappus fremontii var. spinosus
                                                     [Amphipappus fremontii ssp. spinosus]
                                     Anacyclus
                                           [Anacylus]
                                             Anacyclus clavatus
                                                   [Anacyclus tomentosus]
                                                   [Anacylus clavatus]
                                                   [Anacylus tomentosus]
                                             Anacyclus valentinus
                                                   [Anacylus valentinus]
                                     Anaphalis
                                             Anaphalis margaritacea
                                                   [Anaphalis margaritacea var. angustior]
                                                   [Anaphalis margaritacea var. intercedens]
                                                   [Anaphalis margaritacea var. occidentalis]
                                                   [Anaphalis margaritacea var. revoluta]
                                                   [Anaphalis margaritacea var. subalpina]
                                                   [Anaphalis occidentalis]
                                                   [Gnaphalium margaritaceum]
                                     Ancistrocarphus
                                             Ancistrocarphus filagineus
                                                   [Stylocline filaginea var. depressa]
                                                   [Stylocline filaginea]
                                             Ancistrocarphus keilii
                                     Anisocarpus
                                           [Raillardiopsis]
                                             Anisocarpus madioides
                                             Anisocarpus scabridus
                                                   [Raillardella scabrida]
                                                   [Raillardiopsis scabrida]
                                     Anisocoma
                                             Anisocoma acaulis
                                     Antennaria
                                             Antennaria X erigeroides
                                             Antennaria X foliacea
                                             Antennaria X macounii
                                             Antennaria X oblancifolia
                                                   [Antennaria oblancifolia]
                                             Antennaria alaskana
                                             Antennaria alpina
                                                   [Antennaria alpina var. canescens]
                                                   [Antennaria alpina var. compacta]
                                                   [Antennaria alpina var. glabrata]
                                                   [Antennaria alpina var. intermedia]
                                                   [Antennaria alpina var. stolonifera]
                                                   [Antennaria alpina var. ungavensis]
                                                   [Antennaria arenicola]
                                                   [Antennaria atriceps]
                                                   [Antennaria bayardii]
                                                   [Antennaria boecheriana]
                                                   [Antennaria borealis]
                                                   [Antennaria brevistyla]
                                                   [Antennaria brunnescens]
                                                   [Antennaria cana]
                                                   [Antennaria canescens ssp. porsildii]
                                                   [Antennaria canescens var. pseudoporsildii]
                                                   [Antennaria canescens]
                                                   [Antennaria columnaris]
                                                   [Antennaria compacta]
                                                   [Antennaria confusa]
                                                   [Antennaria crymophila]
                                                   [Antennaria foggii]
                                                   [Antennaria friesiana ssp. compacta]
                                                   [Antennaria glabrata]
                                                   [Antennaria groenlandica]
                                                   [Antennaria hansii]
                                                   [Antennaria intermedia]
                                                   [Antennaria labradorica]
                                                   [Antennaria longii]
                                                   [Antennaria media ssp. compacta]
                                                   [Antennaria pallida]
                                                   [Antennaria pedunculata]
                                                   [Antennaria porsildii]
                                                   [Antennaria sornborgeri]
                                                   [Antennaria stolonifera]
                                                   [Antennaria subcanescens]
                                                   [Antennaria ungavensis]
                                                   [Antennaria vexillifera]
                                                   [Antennaria wiegandii]
                                                   [Gnaphalium alpinum]
                                             Antennaria ambigens
                                             Antennaria ampla
                                             Antennaria anaphaloides
                                                   [Antennaria pulcherrima ssp. anaphaloides]
                                                   [Antennaria pulcherrima var. anaphaloides]
                                             Antennaria angustata
                                             Antennaria arcuata
                                             Antennaria argentea
                                                   [Antennaria luzuloides var. argentea]
                                             Antennaria arkansana
                                             Antennaria arnoglossa
                                             Antennaria aromatica
                                             Antennaria bifrons
                                             Antennaria brainerdii
                                             Antennaria burwellensis
                                             Antennaria callophylla
                                             Antennaria calophylla
                                             Antennaria carpatica
                                                   [Antennaria carpathica]
                                             Antennaria caucasica
                                             Antennaria chilensis
                                                   [Antennaria magellanica]
                                             Antennaria congesta
                                             Antennaria corymbosa
                                                   [Antennaria dioica var. corymbosa]
                                                   [Antennaria hygrophila]
                                                   [Antennaria nardina]
                                             Antennaria densifolia
                                                   [Antennaria ellyae]
                                             Antennaria dimorpha
                                                   [Antennaria dimorpha var. integra]
                                                   [Antennaria dimorpha var. latisquama]
                                                   [Antennaria dimorpha var. macrocephala]
                                                   [Antennaria latisquama]
                                                   [Antennaria macrocephala]
                                                   [Gnaphalium dimorphum]
                                             Antennaria dioica
                                                   [Antennaria dioica var. hyperborea]
                                                   [Antennaria hyperborea]
                                                   [Antennaria insularis]
                                                   [Gnaphalium dioicum]
                                             Antennaria ekmaniana
                                             Antennaria exilis
                                             Antennaria fallax
                                             Antennaria farwellii
                                             Antennaria fernaldiana
                                             Antennaria flagellaris
                                                   [Antennaria dimorpha var. flagellaris]
                                             Antennaria foliacea
                                             Antennaria friesiana
                                               Antennaria friesiana ssp. alaskana
                                               Antennaria friesiana ssp. friesiana
                                                     [Antennaria alpina var. friesiana]
                                               Antennaria friesiana ssp. neoalaskana
                                             Antennaria geyeri
                                                   [Gnaphalium alienum]
                                             Antennaria greenei
                                             Antennaria howellii
                                               Antennaria howellii ssp. canadensis
                                                     [Antennaria canadensis]
                                                     [Antennaria neglecta var. canadensis]
                                                     [Antennaria neglecta var. randii]
                                                     [Antennaria neodioica ssp. canadensis]
                                                     [Antennaria neodioica var. randii]
                                                     [Antennaria randii]
                                                     [Antennaria spathulata]
                                               Antennaria howellii ssp. howellii
                                                     [Antennaria callilepis]
                                                     [Antennaria eximia]
                                                     [Antennaria neeglecta var. howellii]
                                                     [Antennaria neglecta ssp. howellii]
                                                     [Antennaria neglecta var. howellii]
                                                     [Antennaria neodioica ssp. howellii]
                                               Antennaria howellii ssp. petaloidea
                                                     [Antennaria appendiculata]
                                                     [Antennaria concolor]
                                                     [Antennaria neglecta var. petaloidea]
                                                     [Antennaria neodioica ssp. petaloidea]
                                                     [Antennaria neodioica var. petaloidea]
                                                     [Antennaria pedicellata]
                                                     [Antennaria petaloidea var. scariosa]
                                                     [Antennaria petaloidea var. subcorymbosa]
                                                     [Antennaria petaloidea]
                                                     [Antennaria stenolepis]
                                               Antennaria howellii ssp. neodioica
                                                     [Antennaria grandis]
                                                     [Antennaria neglecta var. attenuata]
                                                     [Antennaria neglecta var. neodioica]
                                                     [Antennaria neodioica var. attenuata]
                                                     [Antennaria neodioica var. chlorophylla]
                                                     [Antennaria neodioica var. grandis]
                                                     [Antennaria neodioica var. interjecta]
                                                     [Antennaria neodioica var. intertjecta]
                                                     [Antennaria neodioica var. rupicola]
                                                     [Antennaria neodioica]
                                                     [Antennaria obovata]
                                                     [Antennaria rhodantha]
                                                     [Antennaria rupicola]
                                                     [Antennaria russellii]
                                             Antennaria hudsonica
                                             Antennaria lanata
                                                   [Antennaria carpathica var. lanata]
                                                   [Antennaria carpatica var. lanata]
                                             Antennaria luzuloides
                                               Antennaria luzuloides ssp. aberrans
                                                     [Antennaria argentea ssp. aberrans]
                                                     [Antennaria luzuloides var. microcephala]
                                                     [Antennaria microcephala]
                                                     [Antennaria pyramidata]
                                               Antennaria luzuloides ssp. luzuloides
                                                     [Antennaria luzuloides var. oblanceolata]
                                                     [Antennaria oblanceolata]
                                             Antennaria marginata
                                                   [Antennaria dioica var. marginata]
                                                   [Antennaria fendleri]
                                                   [Antennaria peramoena]
                                             Antennaria media
                                                   [Antennaria alpina var. media]
                                                   [Antennaria austromontana]
                                                   [Antennaria candida]
                                                   [Antennaria densa]
                                                   [Antennaria gormanii]
                                                   [Antennaria modesta]
                                                   [Antennaria mucronata]
                                             Antennaria megacephala
                                             Antennaria mesochora
                                             Antennaria microphylla
                                                   [Antennaria bracteosa]
                                                   [Antennaria nitida]
                                                   [Antennaria parvifolia var. bracteosa]
                                                   [Antennaria rosea var. nitida]
                                                   [Antennaria solstitialis]
                                             Antennaria monocephala
                                                   [Antennaria monocephala var. latisquamea]
                                               Antennaria monocephala ssp. angustata
                                                     [Antennaria friesiana var. megacephala]
                                                     [Antennaria monocephala ssp. angustifolia]
                                               Antennaria monocephala ssp. monocephala
                                                     [Antennaria monocephala ssp. philonipha]
                                                     [Antennaria monocephala var. exilis]
                                             Antennaria munda
                                             Antennaria neeglecta
                                             Antennaria neglecta
                                                   [Antennaria angustiarum]
                                                   [Antennaria athabascensis]
                                                   [Antennaria campestris var. athabascensis]
                                                   [Antennaria campestris]
                                                   [Antennaria chelonica]
                                                   [Antennaria erosa]
                                                   [Antennaria howellii var. athabascensis]
                                                   [Antennaria howellii var. campestris]
                                                   [Antennaria longifolia]
                                                   [Antennaria lunellii]
                                                   [Antennaria nebraskensis]
                                                   [Antennaria neglecta var. athabascensis]
                                                   [Antennaria neglecta var. campestris]
                                                   [Antennaria parvula]
                                                   [Antennaria wilsonii]
                                             Antennaria neoalaskana
                                             Antennaria nitens
                                             Antennaria occidentalis
                                             Antennaria parlinii
                                               Antennaria parlinii ssp. fallax
                                                     [Antennaria arnoglossa var. ambigens]
                                                     [Antennaria fallax var. calophylla]
                                                     [Antennaria parlinii var. farwellii]
                                                     [Antennaria plantaginifolia var. ambigens]
                                               Antennaria parlinii ssp. parlinii
                                                     [Antennaria parlinii var. arnoglossa]
                                                     [Antennaria plantaginifolia var. arnoglossa]
                                                     [Antennaria plantaginifolia var. parlinii]
                                             Antennaria parvifolia
                                                   [Antennaria aprica var. minuscula]
                                                   [Antennaria aprica]
                                                   [Antennaria aureola]
                                                   [Antennaria holmii]
                                                   [Antennaria latisquamea]
                                                   [Antennaria minuscula]
                                                   [Antennaria obtusata]
                                                   [Antennaria pumila]
                                                   [Antennaria recurva]
                                                   [Antennaria rhodanthus]
                                             Antennaria philonipha
                                             Antennaria plantaginifolia
                                                   [Antennaria caroliniana]
                                                   [Antennaria decipiens]
                                                   [Antennaria denikeana]
                                                   [Antennaria nemoralis]
                                                   [Antennaria petiolata]
                                                   [Antennaria pinetorum]
                                                   [Antennaria plantaginifolia var. petiolata]
                                                   [Gnaphalium plantaginifolium]
                                             Antennaria pulchella
                                                   [Antennaria alpina var. scabra]
                                                   [Antennaria media ssp. ciliata]
                                                   [Antennaria media ssp. pulchella]
                                                   [Antennaria scabra]
                                             Antennaria pulcherrima
                                                   [Antennaria carpathica var. pulcherrima]
                                                   [Antennaria carpatica var. pulcherrima]
                                                   [Antennaria pulcherrima var. angustisquama]
                                                   [Antennaria pulcherrima var. sordida]
                                               Antennaria pulcherrima ssp. eucosma
                                                     [Antennaria carpatica var. humilis]
                                                     [Antennaria eucosma]
                                               Antennaria pulcherrima ssp. anaphaloides
                                             Antennaria pulcherrima ssp. pulcherrima
                                             Antennaria pulvinata
                                             Antennaria pygmaea
                                             Antennaria racemosa
                                                   [Antennaria petasites]
                                                   [Antennaria piperi]
                                             Antennaria rosea
                                               Antennaria rosea ssp. arida
                                                     [Antennaria arida ssp. viscidula]
                                                     [Antennaria arida]
                                                     [Antennaria scariosa]
                                               Antennaria rosea ssp. confinis
                                                     [Antennaria albicans]
                                                     [Antennaria arida var. humilis]
                                                     [Antennaria breitungii]
                                                     [Antennaria concinna]
                                                     [Antennaria confinis]
                                                     [Antennaria dioica var. kernensis]
                                                     [Antennaria elegans]
                                                     [Antennaria foliacea var. humilis]
                                                     [Antennaria incarnata]
                                                     [Antennaria laingii]
                                                     [Antennaria leontopodioides]
                                                     [Antennaria leuchippii]
                                                     [Antennaria rosea ssp. elegans]
                                                     [Antennaria rosea var. angustifolia]
                                                     [Antennaria sedoides]
                                                     [Antennaria sordida]
                                                     [Antennaria subviscosa]
                                                     [Antennaria tomentella]
                                               Antennaria rosea ssp. pulvinata
                                                     [Antennaria affinis]
                                                     [Antennaria albescens]
                                                     [Antennaria fusca]
                                                     [Antennaria gaspensis]
                                                     [Antennaria howellii ssp. gaspensis]
                                                     [Antennaria isolepis]
                                                     [Antennaria maculata]
                                                     [Antennaria manicouagana]
                                                     [Antennaria media ssp. fusca]
                                                     [Antennaria neglecta var. gaspensis]
                                                     [Antennaria neodioica var. gaspensis]
                                                     [Antennaria peasei]
                                                     [Antennaria pulvinata ssp. albescens]
                                                     [Antennaria pulvinata]
                                                     [Antennaria sansonii]
                                                     [Antennaria straminea]
                                               Antennaria rosea ssp. rosea
                                                     [Antennaria acuminata]
                                                     [Antennaria alborosea]
                                                     [Antennaria chlorantha]
                                                     [Antennaria dioica var. rosea]
                                                     [Antennaria formosa]
                                                     [Antennaria hendersonii]
                                                     [Antennaria imbricata]
                                                     [Antennaria lanulosa]
                                                     [Antennaria neodioica var. chlorantha]
                                                     [Antennaria oxyphylla]
                                                     [Antennaria rosea ssp. divaricata]
                                                     [Antennaria rosea var. imbricata]
                                                     [Antennaria speciosa]
                                             Antennaria rosulata
                                                   [Antennaria bakeri]
                                                   [Antennaria sierrae-blancae]
                                             Antennaria schumaginensis
                                             Antennaria shumaginensis
                                             Antennaria soliceps
                                             Antennaria solitaria
                                                   [Antennaria plantaginifolia var. monocephala]
                                             Antennaria stenophylla
                                                   [Antennaria alpina var. stenophylla]
                                                   [Antennaria leucophaea]
                                             Antennaria suffrutescens
                                             Antennaria tansleyi
                                             Antennaria tweedsmurii
                                             Antennaria umbellata
                                             Antennaria umbrinella
                                                   [Antennaria aizoides]
                                                   [Antennaria flavescens]
                                                   [Antennaria reflexa]
                                             Antennaria unbellata
                                             Antennaria virginica
                                                   [Antennaria neglecta var. argillicola]
                                                   [Antennaria virginica var. argillicola]
                                     Anthemis
                                             Anthemis altissima
                                                   [Cota altissima]
                                             Anthemis arvensis
                                                   [Anthemis arvensis var. agrestis]
                                                   [Anthemis arvensis var. arvensis]
                                             Anthemis austriaca
                                             Anthemis cotula
                                                   [Maruta cotula]
                                             Anthemis fuscata
                                             Anthemis mixta
                                             Anthemis nobilis
                                             Anthemis secundiramea
                                             Anthemis tinctoria
                                     Antheropeas
                                     Apargia
                                             Apargia nudicaulis
                                     Aphanostephus
                                             Aphanostephus arizonicus
                                             Aphanostephus humilis
                                             Aphanostephus kidderi
                                             Aphanostephus pilosus
                                             Aphanostephus potosinus
                                             Aphanostephus ramosissimus
                                               Aphanostephus ramosissimus var. humilis
                                               Aphanostephus ramosissimus var. ramosissimus
                                             Aphanostephus riddellii
                                             Aphanostephus skirrhobasis
                                               Aphanostephus skirrhobasis var. kidderi
                                               Aphanostephus skirrhobasis var. skirrhobasis
                                               Aphanostephus skirrhobasis var. thalassius
                                     Aphantochaeta
                                             Aphantochaeta exilis
                                     Aplopappus
                                             Aplopappus sphaerocephalus
                                     Arctanthemum
                                             Arctanthemum arcticum
                                                   [Chrysanthemum arcticum ssp. arcticum]
                                                   [Dendranthema arcticum ssp. arcticum]
                                                   [Dendranthema arcticum]
                                                   [Dendranthema articum]
                                               Arctanthemum arcticum ssp. arcticum
                                               Arctanthemum arcticum ssp. polare
                                                     [Dendranthema arcticum ssp. polare]
                                     Arctium
                                             Arctium X mixtum
                                             Arctium X nothum
                                             Arctium lappa
                                                   [Arctium minus ssp. nemorosum]
                                                   [Arctium nemorosum]
                                                   [Arctium vulgare]
                                                   [Lappa major]
                                             Arctium minus
                                                   [Lappa minor]
                                             Arctium tomentosum
                                     Arctotheca
                                             Arctotheca calendula
                                     Arctotis
                                             Arctotis angustifolia
                                             Arctotis fastuosa
                                             Arctotis stoechadifolia
                                                   [Arctotis grandis]
                                                   [Arctotis stoechadifolia var. grandis]
                                     Argyranthemum
                                             Argyranthemum foeniculum
                                                   [Argyranthemum anethifolium]
                                                   [Pyrethrum anethifolium]
                                             Argyranthemum frutescens
                                             Argyranthemum gracilis
                                     Argyroxiphium
                                             Argyroxiphium X kai
                                                   [Argyroxiphium caliginis var. kai]
                                             Argyroxiphium caliginis
                                             Argyroxiphium grayanum
                                                   [Wilkesia grayana]
                                             Argyroxiphium kauense
                                                   [Argyroxiphium sandwicense var. kauense]
                                             Argyroxiphium macrocephalum
                                             Argyroxiphium sandwicense
                                               Argyroxiphium sandwicense ssp. macrocephalum
                                               Argyroxiphium sandwicense ssp. sandwicense
                                             Argyroxiphium virescens
                                                   [Argyroxiphium forbesii]
                                     Arida
                                             Arida arizonica
                                                   [Machaeranthera coulteri var. arida]
                                                   [Psilactis coulteri]
                                             Arida blepharophylla
                                             Arida carnosa
                                                   [Bigelovia intricata]
                                                   [Leucosyris carnosa var. intricata]
                                                   [Leucosyris carnosa]
                                                   [Linosyris carnosa]
                                                   [Machaeranthera carnosa var. carnosa]
                                                   [Machaeranthera carnosa var. intricata]
                                             Arida mattturneri
                                             Arida parviflora
                                             Arida riparia
                                     Arnica
                                           [Whitneya]
                                             Arnica acaulis
                                                   [Doronicum acaule]
                                             Arnica alpina
                                               Arnica alpina ssp. tomentosa
                                             Arnica amplexicaulis
                                             Arnica amplexifolia
                                             Arnica angustifolia
                                               Arnica angustifolia ssp. angustifolia
                                                     [Arnica alpina ssp. angustifolia]
                                                     [Arnica alpina ssp. attenuata]
                                                     [Arnica alpina ssp. sornborgeri]
                                                     [Arnica alpina var. angustifolia]
                                                     [Arnica alpina var. attenuata]
                                                     [Arnica alpina var. linearis]
                                                     [Arnica alpina var. plantaginea]
                                                     [Arnica alpina var. ungavensis]
                                                     [Arnica alpina var. vestita]
                                                     [Arnica angustifolia ssp. attenuata]
                                               Arnica angustifolia ssp. tomentosa
                                                     [Arnica alpina var. tomentosa]
                                                     [Arnica angustifolia var. tomentosa]
                                             Arnica cernua
                                                   [Arnica chandleri]
                                             Arnica chamissonis
                                                   [Arnica bernardina]
                                                   [Arnica chamissonis ssp. chamissonis]
                                                   [Arnica chamissonis ssp. foliosa]
                                                   [Arnica chamissonis ssp. genuina]
                                                   [Arnica chamissonis ssp. incana]
                                                   [Arnica chamissonis var. foliosa]
                                                   [Arnica chamissonis var. jepsoniana]
                                                   [Arnica foliosa var. incana]
                                                   [Arnica foliosa]
                                               Arnica chamissonis ssp. foliosa
                                             Arnica cordifolia
                                                   [Arnica cordifolia ssp. genuina]
                                                   [Arnica cordifolia var. humilis]
                                                   [Arnica cordifolia var. pumila]
                                                   [Arnica cordifolia var. whitneyi]
                                                   [Arnica hardinae]
                                                   [Arnica humilis]
                                                   [Arnica paniculata]
                                                   [Arnica whitneyi]
                                             Arnica dealbata
                                                   [Whitneya dealbata]
                                             Arnica discoidea
                                                   [Arnica discoidea var. alata]
                                                   [Arnica discoidea var. eradiata]
                                                   [Arnica grayi]
                                                   [Arnica parviflora ssp. alata]
                                                   [Arnica parviflora]
                                             Arnica frigida
                                             Arnica fulgens
                                             Arnica gracilis
                                                   [Arnica latifolia var. gracilis]
                                             Arnica griscomii
                                                   [Arnica frigida ssp. griscomii]
                                                   [Arnica louiseana ssp. griscomii]
                                                   [Arnica louiseana var. griscomii]
                                               Arnica griscomii ssp. frigida
                                                     [Arnica frigida ssp. frigida]
                                                     [Arnica frigida var. glandulosa]
                                                     [Arnica louiseana ssp. frigida]
                                                     [Arnica louiseana var. brevifolia]
                                                     [Arnica louiseana var. frigida]
                                                     [Arnica louiseana var. illiamnae]
                                                     [Arnica louiseana var. mendenhallii]
                                                     [Arnica louiseana var. pilosa]
                                               Arnica griscomii ssp. griscomii
                                             Arnica lanceolata
                                               Arnica lanceolata ssp. lanceolata
                                               Arnica lanceolata ssp. prima
                                                     [Arnica amplexicaulis ssp. genuina]
                                                     [Arnica amplexicaulis ssp. prima]
                                                     [Arnica amplexicaulis var. piperi]
                                                     [Arnica amplexicaulis var. prima]
                                             Arnica latifolia
                                                   [Arnica latifolia var. angustifolia]
                                             Arnica lessingii
                                                   [Arnica lessingii ssp. norbergii]
                                             Arnica lonchophylla
                                                   [Arnica alpina ssp. lonchophylla]
                                                   [Arnica alpina var. lonchophylla]
                                                   [Arnica angustifolia ssp. lonchophylla]
                                                   [Arnica arnoglossa]
                                                   [Arnica chionopappa]
                                                   [Arnica gaspensis]
                                                   [Arnica lonchophylla ssp. arnoglossa]
                                                   [Arnica lonchophylla ssp. chionopappa]
                                                   [Arnica lonchophylla ssp. lonchophylla]
                                                   [Arnica lonchophylla var. arnoglossa]
                                             Arnica longifolia
                                                   [Arnica longifolia ssp. genuina]
                                                   [Arnica longifolia ssp. myriadenia]
                                             Arnica louiseana
                                                   [Arnica louiseana var. genuina]
                                             Arnica mollis
                                                   [Arnica mollis var. silvatica]
                                               Arnica mollis var. aspera
                                               Arnica mollis var. petiolaris
                                             Arnica montana
                                             Arnica nevadensis
                                                   [Arnica tomentella]
                                             Arnica ovata
                                                   [Arnica X diversifolia]
                                             Arnica parryi
                                                   [Arnica parryi ssp. genuina]
                                                   [Arnica parryi ssp. parryi]
                                                   [Arnica parryi ssp. sonnei]
                                                   [Arnica parryi var. sonnei]
                                                   [Arnica sonnei]
                                             Arnica plantaginea
                                             Arnica rydbergii
                                                   [Arnica cascadensis]
                                             Arnica snyderi
                                             Arnica sornborgeri
                                             Arnica sororia
                                                   [Arnica fulgens var. sororia]
                                             Arnica spathulata
                                                   [Arnica cusickii]
                                                   [Arnica spathulata ssp. eastwoodiae]
                                                   [Arnica spathulata var. eastwoodiae]
                                             Arnica terrae-novae
                                             Arnica tomentosa
                                             Arnica unalaschcensis
                                             Arnica venosa
                                             Arnica viscosa
                                                   [Chrysopsis shastensis]
                                     Arnoglossum
                                             Arnoglossum album
                                             Arnoglossum atriplicifolium
                                                   [Cacalia atriplicifolia]
                                                   [Cacalia paniculata]
                                                   [Cacalia rotundifolia]
                                                   [Mesadenia atriplicifolia]
                                             Arnoglossum diversifolium
                                                   [Cacalia diversifolia]
                                                   [Mesadenia diversifolia]
                                             Arnoglossum floridanum
                                                   [Cacalia floridana]
                                                   [Mesadenia floridana]
                                             Arnoglossum ovatum
                                                   [Cacalia elliottii]
                                                   [Cacalia lanceolata var. elliottii]
                                                   [Cacalia lanceolata var. virescens]
                                                   [Cacalia lanceolata]
                                                   [Cacalia ovata]
                                                   [Mesadenia elliottii]
                                                   [Mesadenia lanceolata var. virescens]
                                                   [Mesadenia lanceolata]
                                                   [Mesadenia maxima]
                                             Arnoglossum plantagineum
                                                   [Cacalia plantaginea]
                                                   [Cacalia pteranthes]
                                                   [Cacalia tuberosa]
                                                   [Mesadenia tuberosa]
                                             Arnoglossum reniforme
                                                   [Arnoglossum muehlenbergii]
                                                   [Cacalia muehlenbergii]
                                                   [Cacalia muhlenbergii]
                                                   [Cacalia reniformis]
                                                   [Mesadenia reniformis]
                                             Arnoglossum sulcatum
                                                   [Cacalia sulcata]
                                                   [Mesadenia sulcata]
                                     Arnoseris
                                             Arnoseris minima
                                                   [Hyoseris minima]
                                     Artemisia
                                             Artemisia abrotanum
                                                   [Artemisia procera]
                                             Artemisia absinthium
                                                   [Artemisia absinthium var. absinthium]
                                                   [Artemisia absinthium var. insipida]
                                             Artemisia alaskana
                                                   [Artemisia tyrellii]
                                             Artemisia aleutica
                                             Artemisia alpina
                                                   [Artemisia caucasica]
                                             Artemisia angusta
                                             Artemisia angustifolia
                                             Artemisia annua
                                             Artemisia arbuscula
                                               Artemisia arbuscula ssp. arbuscula
                                                     [Artemisia tridentata ssp. arbuscula]
                                               Artemisia arbuscula ssp. longicaulis
                                               Artemisia arbuscula ssp. longiloba
                                                     [Artemisia arbuscula var. longiloba]
                                                     [Artemisia spiciformis var. longiloba]
                                               Artemisia arbuscula ssp. thermopola
                                             Artemisia arctica
                                               Artemisia arctica ssp. saxicola
                                             Artemisia argentea
                                             Artemisia argilosa
                                             Artemisia aucheri
                                             Artemisia australis
                                                   [Artemisia hillebrandii]
                                             Artemisia biennis
                                                   [Artemisia biennis var. biennis]
                                                   [Artemisia biennis var. diffusa]
                                             Artemisia bigelovii
                                             Artemisia bolanderi
                                             Artemisia borealis
                                                   [Artemisia campestris ssp. borealis]
                                               Artemisia borealis ssp. borealis
                                                     [Artemisia borealis ssp. purshii]
                                                     [Artemisia borealis var. latisecta]
                                                     [Artemisia borealis var. purshii]
                                                     [Artemisia campestris var. strutziae]
                                               Artemisia borealis ssp. richardsoniana
                                             Artemisia californica
                                             Artemisia campestris
                                               Artemisia campestris ssp. campestris
                                               Artemisia campestris ssp. canadensis
                                                     [Artemisia campestris var. canadensis]
                                               Artemisia campestris ssp. caudata
                                                     [Artemisia campestris var. caudata]
                                                     [Artemisia caudata var. calvens]
                                                     [Oligosporus campestris ssp. caudatus]
                                               Artemisia campestris ssp. glutinosa
                                               Artemisia campestris ssp. pacifica
                                                     [Artemisia campestris var. pacifica]
                                                     [Oligosporus campestris ssp. pacificus]
                                             Artemisia camporum
                                             Artemisia cana
                                               Artemisia cana ssp. bolanderi
                                                     [Artemisia tridentata ssp. bolanderi]
                                                     [Artemisia tridentata var. bolanderi]
                                               Artemisia cana ssp. cana
                                                     [Artemisia cana var. cana]
                                               Artemisia cana ssp. viscidula
                                                     [Artemisia cana var. viscidula]
                                             Artemisia canadensis
                                             Artemisia carruthii
                                                   [Artemisia carruthii var. wrightii]
                                                   [Artemisia kansana]
                                             Artemisia caudata
                                             Artemisia chamaemelifolia
                                             Artemisia cina
                                             Artemisia comata
                                             Artemisia douglasiana
                                                   [Artemisia campestris var. douglasiana]
                                                   [Artemisia heterophylla]
                                                   [Artemisia vulgaris ssp. heterophylla]
                                                   [Artemisia vulgaris var. douglasiana]
                                             Artemisia dracunculus
                                                   [Artemisia dracunculoides var. dracunculina]
                                                   [Artemisia dracunculoides]
                                                   [Artemisia dracunculus ssp. dracunculus]
                                                   [Artemisia dracunculus ssp. glauca]
                                                   [Artemisia dracunculus var. glauca]
                                                   [Artemisia glauca var. dracunculina]
                                                   [Artemisia glauca var. dracunculus]
                                                   [Artemisia glauca]
                                                   [Oligosporus dracunculus ssp. dracunculinus]
                                                   [Oligosporus dracunculus ssp. glaucus]
                                                   [Oligosporus dracunculus]
                                             Artemisia filifolia
                                                   [Oligosporus filifolius]
                                             Artemisia forwoodii
                                             Artemisia franserioides
                                             Artemisia frigida
                                                   [Artemisia frigida var. williamsiae]
                                             Artemisia furcata
                                                   [Artemisia furcata var. furcata]
                                                   [Artemisia furcata var. heterophylla]
                                                   [Artemisia hyperborea]
                                                   [Artemisia tacomensis]
                                                   [Artemisia trifurcata]
                                             Artemisia globularia
                                                   [Artemisia flava]
                                                   [Artemisia globularia var. lutea]
                                             Artemisia glomerata
                                                   [Artemisia glomerata var. glomerata]
                                                   [Artemisia glomerata var. subglabrata]
                                             Artemisia gmelinii
                                                   [Artemisia sacrorum]
                                             Artemisia gorgonum
                                             Artemisia herba-alba
                                             Artemisia kauaiensis
                                                   [Artemisia hillebrandii var. kauaiensis]
                                             Artemisia krushiana
                                             Artemisia laciniata
                                                   [Artemisia laciniatiformis]
                                               Artemisia laciniata ssp. laciniata
                                               Artemisia laciniata ssp. parryi
                                                     [Artemisia parryi]
                                             Artemisia lessingiana
                                             Artemisia longifolia
                                             Artemisia longiloba
                                             Artemisia ludoviciana
                                               Artemisia ludoviciana ssp. candicans
                                                     [Artemisia candicans]
                                                     [Artemisia ludoviciana var. latiloba]
                                               Artemisia ludoviciana ssp. estesii
                                               Artemisia ludoviciana ssp. redolens
                                                     [Artemisia ludoviciana var. redolens]
                                                     [Artemisia redolens]
                                               Artemisia ludoviciana ssp. sulcata
                                                     [Artemisia sulcata]
                                               Artemisia ludoviciana var. ludoviciana
                                               Artemisia ludoviciana ssp. albula
                                                     [Artemisia albula]
                                                     [Artemisia ludoviciana var. albula]
                                               Artemisia ludoviciana ssp. incompta
                                                     [Artemisia incompta]
                                                     [Artemisia lindleyana]
                                                     [Artemisia ludoviciana var. incompta]
                                                     [Artemisia prescottiana]
                                               Artemisia ludoviciana ssp. ludoviciana
                                                     [Artemisia diversifolia]
                                                     [Artemisia gnaphalodes]
                                                     [Artemisia herriotii]
                                                     [Artemisia ludoviciana ssp. typica]
                                                     [Artemisia ludoviciana var. americana]
                                                     [Artemisia ludoviciana var. brittonii]
                                                     [Artemisia ludoviciana var. gnaphalodes]
                                                     [Artemisia ludoviciana var. latifolia]
                                                     [Artemisia ludoviciana var. pabularis]
                                                     [Artemisia pabularis]
                                                     [Artemisia purshiana]
                                                     [Artemisia vulgaris ssp. ludoviciana]
                                                     [Artemisia vulgaris var. ludoviciana]
                                               Artemisia ludoviciana ssp. mexicana
                                                     [Artemisia ludoviciana var. mexicana]
                                                     [Artemisia mexicana]
                                                     [Artemisia neomexicana]
                                                     [Artemisia vulgaris var. mexicana]
                                             Artemisia macrobotrys
                                             Artemisia maritima
                                             Artemisia mauiensis
                                                   [Artemisia mauiensis var. diffusa]
                                             Artemisia michauxiana
                                                   [Artemisia vulgaris ssp. michauxiana]
                                             Artemisia minima
                                             Artemisia nesiotica
                                                   [Artemisia californica var. insularis]
                                             Artemisia norvegica
                                               Artemisia norvegica ssp. norvegica
                                               Artemisia norvegica var. norvegica
                                               Artemisia norvegica ssp. saxatilis
                                                     [Artemisia arctica ssp. arctica]
                                                     [Artemisia arctica ssp. beringensis]
                                                     [Artemisia arctica ssp. comata]
                                                     [Artemisia arctica var. beringensis]
                                                     [Artemisia norvegica var. comata]
                                                     [Artemisia norvegica var. piceetorum]
                                                     [Artemisia norvegica var. saxatilis]
                                             Artemisia nova
                                                   [Artemisia arbuscula ssp. nova]
                                                   [Artemisia arbuscula var. nova]
                                                   [Artemisia nova var. duchesnicola]
                                                   [Artemisia nova var. nova]
                                                   [Artemisia tridentata ssp. nova]
                                                   [Seriphidium novum]
                                             Artemisia pacifica
                                             Artemisia packardiae
                                             Artemisia palmeri
                                             Artemisia papposa
                                             Artemisia pattersonii
                                             Artemisia pedatifida
                                                   [Oligosporus pedatifidus]
                                             Artemisia pontica
                                             Artemisia porteri
                                             Artemisia pycnocephala
                                             Artemisia pygmaea
                                                   [Seriphidium pygmaeum]
                                             Artemisia richardsoniana
                                             Artemisia rigida
                                                   [Artemisia trifida var. rigida]
                                                   [Seriphidium rigidum]
                                             Artemisia ripicola
                                             Artemisia rothrockii
                                                   [Artemisia tridentata ssp. rothrockii]
                                                   [Artemisia tridentata var. rothrockii]
                                                   [Seriphidium rothrockii]
                                             Artemisia rupestris
                                                   [Artemisia rupestris ssp. rupestris]
                                                   [Artemisia rupestris ssp. woodii]
                                             Artemisia scoparia
                                             Artemisia scopulorum
                                             Artemisia selengensis
                                             Artemisia senjavinensis
                                             Artemisia serrata
                                             Artemisia sibirica
                                             Artemisia spiciformis
                                                   [Artemisia tridentata ssp. spiciformis]
                                                   [Artemisia tridentata var. spiciformis]
                                             Artemisia spithamea
                                             Artemisia stelleriana
                                             Artemisia suksdorfii
                                             Artemisia thuscula
                                                   [Artemisia canariensis]
                                             Artemisia tilesii
                                                   [Artemisia elatior]
                                                   [Artemisia gormanii]
                                                   [Artemisia hookeriana]
                                                   [Artemisia tilesii ssp. elatior]
                                                   [Artemisia tilesii ssp. gormanii]
                                                   [Artemisia tilesii ssp. tilesii]
                                                   [Artemisia tilesii ssp. unalaschcensis]
                                                   [Artemisia tilesii var. aleutica]
                                                   [Artemisia tilesii var. elatior]
                                                   [Artemisia tilesii var. unalaschcensis]
                                                   [Artemisia unalaskensis var. aleutica]
                                                   [Artemisia unalaskensis]
                                             Artemisia tridentata
                                               Artemisia tridentata ssp. parishii
                                                     [Artemisia tridentata var. parishii]
                                               Artemisia tridentata ssp. tridentata
                                                     [Artemisia tridentata ssp. xericensis]
                                                     [Artemisia tridentata var. angustifolia]
                                               Artemisia tridentata ssp. vaseyana
                                                     [Artemisia tridentata var. pauciflora]
                                                     [Artemisia tridentata var. vaseyana]
                                               Artemisia tridentata ssp. wyomingensis
                                                     [Artemisia tridentata var. wyomingensis]
                                             Artemisia trifida
                                             Artemisia tripartita
                                               Artemisia tripartita ssp. rupicola
                                                     [Artemisia tripartita var. rupicola]
                                               Artemisia tripartita ssp. tripartita
                                                     [Artemisia tridentata ssp. trifida]
                                             Artemisia umbelliformis
                                                   [Artemisia laxa]
                                             Artemisia vaseyana
                                             Artemisia vulgaris
                                                   [Artemisia vulgaris var. coarctata]
                                               Artemisia vulgaris var. vulgaris
                                                     [Artemisia vulgaris var. glabra]
                                                     [Artemisia vulgaris var. kamtschatica]
                                                     [Artemisia vulgaris var. latiloba]
                                                     [Artemisia vulgaris var. selengensis]
                                     Asanthus
                                             Asanthus squamulosus
                                     Askellia
                                             Askellia nana
                                     Aster
                                             Aster X blakei
                                             Aster X herveyi
                                             Aster abatus
                                             Aster acadiensis
                                             Aster acuminatus
                                             Aster adenolepis
                                             Aster adsurgens
                                             Aster agrostifolius
                                             Aster alpigenus
                                               Aster alpigenus ssp. alpigenus
                                               Aster alpigenus ssp. andersonii
                                               Aster alpigenus ssp. haydenii
                                               Aster alpigenus var. andersonii
                                               Aster alpigenus var. haydenii
                                             Aster alpinus
                                               Aster alpinus ssp. vierhapperi
                                                     [Aster alpinus var. vierhapperi]
                                                     [Diplactis alpina ssp. vierhapperi]
                                                     [Diplactis alpina]
                                               Aster alpinus var. alpinus
                                                     [Aster garibaldii]
                                               Aster alpinus var. serpentimontanus
                                                     [Aster serpentimontanus]
                                               Aster alpinus var. vierhapperi
                                             Aster altaicus
                                             Aster amellus
                                                   [Aster amelloides]
                                               Aster amellus ssp. ibericus
                                             Aster amplifolius
                                             Aster andersonii
                                             Aster apricus
                                             Aster aquifolius
                                             Aster asteroides
                                             Aster avitus
                                             Aster behringensis
                                             Aster bellidiflorus
                                             Aster bietii
                                             Aster bifoliatus
                                             Aster bigelovii
                                             Aster blakei
                                             Aster blepharophyllus
                                             Aster boltoniae
                                             Aster boykinii
                                             Aster bracei
                                             Aster brachytrichus
                                             Aster bracteolatus
                                             Aster calderi
                                             Aster calvus
                                             Aster canescens
                                               Aster canescens var. aristatus
                                               Aster canescens var. viscosus
                                             Aster carmesinus
                                             Aster carolinianus
                                             Aster castaneus
                                             Aster caucasicus
                                             Aster chasei
                                             Aster chinensis
                                             Aster chlorolepis
                                             Aster cichoriaceus
                                             Aster claytoni
                                             Aster claytonii
                                             Aster coloradoensis
                                             Aster commutatus
                                             Aster compactus
                                             Aster concinnus
                                             Aster condupicatus
                                             Aster conduplicatus
                                             Aster conspicuus
                                             Aster continuus
                                             Aster cordidifolius
                                             Aster cordineri
                                             Aster coridifolius
                                             Aster covillei
                                             Aster crassulus
                                             Aster crenifolius
                                             Aster curtus
                                             Aster curvescens
                                             Aster delectabilis
                                             Aster demissus
                                             Aster diabolicus
                                             Aster diffusus
                                             Aster diplostephioides
                                             Aster discoideus
                                             Aster divaricatus
                                             Aster dracunculoides
                                             Aster drummondii
                                             Aster dumosus
                                             Aster elatus
                                             Aster elegantulus
                                             Aster eliasii
                                             Aster elodes
                                             Aster eminens
                                             Aster eryngiifolius
                                             Aster excavatus
                                             Aster exiguus
                                             Aster exilis
                                             Aster falcidens
                                             Aster farreri
                                             Aster faxoni
                                             Aster faxonii
                                             Aster filaginifolius
                                             Aster flaccidus
                                               Aster flaccidus var. flaccidus
                                             Aster flexilis
                                             Aster flexilus
                                             Aster foliaceus
                                               Aster foliaceus var. apricus
                                               Aster foliaceus var. arcuans
                                               Aster foliaceus var. burkei
                                               Aster foliaceus var. canbyi
                                               Aster foliaceus var. foliaceus
                                               Aster foliaceus var. frondeus
                                               Aster foliaceus var. parryi
                                               Aster foliaceus var. sublinearis
                                               Aster foliaceus var. subpetiolatus
                                             Aster forwoodii
                                             Aster fremonti
                                             Aster fremontii
                                             Aster frondeus
                                             Aster fruticosus
                                             Aster furcatus
                                             Aster gattingeri
                                             Aster geyeri
                                             Aster glauca
                                             Aster glaucodew
                                             Aster glehnii
                                             Aster glomeratus
                                             Aster glossophyllus
                                             Aster goodingii
                                             Aster gracilipes
                                             Aster gracilis
                                             Aster gymnocephalus
                                             Aster haydenii
                                             Aster hemisphericus
                                             Aster herveyi
                                             Aster hesperius
                                               Aster hesperius var. laetevirens
                                               Aster hesperius var. wootonii
                                             Aster himalaicus
                                             Aster hirsuticaulis
                                             Aster horizontalis
                                             Aster humilis
                                             Aster hybridus
                                             Aster ianthinus
                                             Aster ibericus
                                             Aster inconspicuus
                                             Aster infirmus
                                             Aster inornatus
                                             Aster integrifolius
                                             Aster interior
                                             Aster intricatus
                                             Aster johannensis
                                             Aster jonesiae
                                             Aster junciformis
                                             Aster laetevirens
                                             Aster laevis
                                               Aster laevis var. concinnus
                                               Aster laevis var. falcatus
                                               Aster laevis var. geyeri
                                               Aster laevis var. guadalupensis
                                               Aster laevis var. laevis
                                               Aster laevis var. purpuratus
                                             Aster lamarckianus
                                               Aster lanceolatus ssp. hesperius
                                             Aster latissimifolius
                                             Aster laxifolius
                                             Aster laxus
                                             Aster ledophyllus
                                             Aster leiodes
                                             Aster leucanthemifolius
                                             Aster linariifolius
                                             Aster linearis
                                             Aster linosyris
                                             Aster longifolius
                                             Aster maackii
                                             Aster macrophyllus
                                             Aster major
                                             Aster meritus
                                             Aster mirabilis
                                             Aster modestus
                                             Aster mohavensis
                                             Aster mongolicus
                                             Aster multiflorus
                                             Aster multiformis
                                             Aster nemoralis
                                             Aster neomexicana
                                             Aster neomexicanus
                                             Aster nobilis
                                             Aster novi-belgii
                                             Aster occidentalis
                                             Aster oregonensis
                                               Aster oregonensis ssp. californicus
                                               Aster oregonensis ssp. oregonensis
                                             Aster oreophilus
                                             Aster orthophyllus
                                             Aster osterhoutii
                                             Aster palmeri
                                             Aster paludicola
                                             Aster paludosus
                                             Aster paniculatus
                                               Aster paniculatus var. simplex
                                             Aster pansus
                                             Aster parviflorus
                                             Aster parvulus
                                             Aster patens
                                             Aster patentissimus
                                             Aster paternus
                                             Aster pattersonii
                                             Aster pedionomus
                                             Aster peirsonii
                                             Aster pendulus
                                             Aster phyllodes
                                             Aster pickettianus
                                             Aster pinnatifidus
                                             Aster polycephalus
                                             Aster polyphyllus
                                             Aster porteri
                                             Aster pringlei
                                             Aster pubentior
                                             Aster punctatus
                                             Aster puniceus
                                             Aster purpuratus
                                             Aster pyrenaeus
                                             Aster radula
                                             Aster radulinus
                                             Aster ramosissimus
                                             Aster ramulosus
                                             Aster reticulatus
                                             Aster richardsonii
                                             Aster riciniatus
                                             Aster riparius
                                             Aster rolandii
                                             Aster roscidus
                                             Aster rotundifolius
                                             Aster rubrotinctus
                                             Aster sagittifolius
                                             Aster sandwicensis
                                             Aster saxicastellii
                                             Aster scaber
                                             Aster scabricaulis
                                             Aster schreberi
                                             Aster scopulorum
                                             Aster sedifolius
                                               Aster sedifolius ssp. dracunculoides
                                             Aster sericocarpoides
                                             Aster shastensis
                                               Aster shastensis var. eradiatus
                                               Aster shastensis var. glossophyllus
                                               Aster shastensis var. latifolius
                                             Aster sibiricus
                                             Aster simplex
                                               Aster simplex var. estuarinus
                                               Aster simplex var. interior
                                               Aster simplex var. ramosissimus
                                             Aster simulatus
                                             Aster smallii
                                             Aster solidagineus
                                             Aster sonorae
                                             Aster spatelliformis
                                             Aster spathulatus
                                             Aster spectabilis
                                             Aster spinosus
                                             Aster spinulosus
                                             Aster squamatus
                                             Aster steeleorum
                                             Aster stenomeres
                                             Aster stilettiformis
                                             Aster stricticaulis
                                             Aster strictus
                                             Aster subintegerrimus
                                             Aster subsessilis
                                             Aster surculosus
                                             Aster tataricus
                                             Aster tenebrosus
                                             Aster tenerrimus
                                             Aster tenuicaulis
                                             Aster tephrodes
                                             Aster texanus
                                             Aster thomsonii
                                             Aster tibeticus
                                             Aster tongolensis
                                             Aster tradescantii
                                             Aster trigonicus
                                             Aster tripolium
                                             Aster tweedyi
                                             Aster umbellatus
                                               Aster umbellatus var. pubens
                                               Aster umbellatus var. umbellatus
                                             Aster unalaschkensis
                                             Aster ursinus
                                             Aster vahlii
                                             Aster verutifolius
                                             Aster villosus
                                             Aster vimineus
                                             Aster violaris
                                             Aster virgatus
                                             Aster wootonii
                                             Aster yosemitanus
                                             Aster yunnanensis
                                     Asterago
                                     Astranthium
                                           [Astranthuim]
                                             Astranthium ciliatum
                                                   [Astranthium integrifolium ssp. ciliatum]
                                                   [Astranthium integrifolium var. ciliatum]
                                                   [Astranthium integrifolium var. triflorum]
                                                   [Astranthuim integrifolium var. ciliatum]
                                             Astranthium integrifolium
                                                   [Astranthuim integrifolium]
                                               Astranthium integrifolium ssp. integrifolium
                                                     [Astranthuim integrifolium var. integrifolium]
                                             Astranthium robustum
                                                   [Astranthium integrifolium var. robustum]
                                                   [Astranthuim robustum]
                                     Atrichoseris
                                           [Astrichoseris]
                                             Atrichoseris platyphylla
                                                   [Astrichoseris platyphylla]
                                     Ayapana
                                             Ayapana triplinervis
                                     Baccharis
                                             Baccharis angustifolia
                                             Baccharis bigelovii
                                             Baccharis brachyphylla
                                             Baccharis concava
                                             Baccharis dioica
                                             Baccharis douglasii
                                             Baccharis glomeruliflora
                                             Baccharis halimifolia
                                                   [Baccharis halimifolia var. angustior]
                                                   [Baccharis halimifolia var. halimifolia]
                                             Baccharis havardii
                                             Baccharis malibuensis
                                             Baccharis myrsinites
                                             Baccharis neglecta
                                             Baccharis pedunculata
                                                   [Baccharis cotinifolia]
                                                   [Baccharis speciosa]
                                                   [Conyza pedunculata]
                                             Baccharis pilularis
                                               Baccharis pilularis ssp. consanguinea
                                                     [Baccharis pilularis var. consanguinea]
                                               Baccharis pilularis ssp. pilularis
                                                     [Baccharis pilularis var. pilularis]
                                             Baccharis plummerae
                                               Baccharis plummerae ssp. glabrata
                                               Baccharis plummerae ssp. plummerae
                                             Baccharis pteronioides
                                             Baccharis salicifolia
                                                   [Baccharis glutinosa]
                                                   [Baccharis viminea]
                                                   [Molina salicifolia]
                                             Baccharis salicina
                                                   [Baccharis emoryi]
                                             Baccharis sarothroides
                                             Baccharis sergiloides
                                             Baccharis texana
                                                   [Linosyris texana]
                                             Baccharis thesioides
                                             Baccharis vanessae
                                             Baccharis wrightii
                                     Baeria
                                             Baeria bakeri
                                             Baeria chrysostoma
                                             Baeria hirsutula
                                             Baeria macrantha
                                     Bahia
                                             Bahia absinthifolia
                                                   [Bahia absinthifolia var. absinthifolia]
                                                   [Bahia absinthifolia var. dealbata]
                                             Bahia bigelovii
                                             Bahia biternata
                                             Bahia dissecta
                                             Bahia pedata
                                             Bahia schaffneri
                                             Bahia wallacei
                                     Bahiopsis
                                             Bahiopsis laciniata
                                                   [Viguiera laciniata]
                                             Bahiopsis parishii
                                                   [Viguiera deltoidea var. parishii]
                                                   [Viguiera parishii]
                                             Bahiopsis reticulata
                                                   [Viguiera reticulata]
                                     Baileya
                                             Baileya multiradiata
                                                   [Baileya multiradiata var. thurberi]
                                             Baileya pauciradiata
                                             Baileya pleniradiata
                                                   [Baileya multiradiata var. pleniradiata]
                                                   [Baileya perennis]
                                     Baillieria
                                     Balduina
                                           [Actinospermum]
                                             Balduina angustifolia
                                                   [Actinospermum angustifolium]
                                             Balduina atropurpurea
                                                   [Endorima atropurpurea]
                                             Balduina uniflora
                                                   [Endorima uniflora]
                                     Balsamita
                                             Balsamita major
                                     Balsamorhiza
                                             Balsamorhiza X bonseri
                                                   [Balsamorhiza bonseri]
                                             Balsamorhiza X terebinthacea
                                             Balsamorhiza X tomentosa
                                             Balsamorhiza bolanderi
                                             Balsamorhiza careyana
                                                   [Balsamorhiza careyana var. careyana]
                                                   [Balsamorhiza careyana var. intermedia]
                                             Balsamorhiza deltoidea
                                             Balsamorhiza hispidula
                                                   [Balsamorhiza hookeri var. hispidula]
                                             Balsamorhiza hookeri
                                                   [Balsamorhiza hirsuta var. lagocephala]
                                                   [Balsamorhiza hirsuta var. neglecta]
                                                   [Balsamorhiza hirsuta]
                                                   [Balsamorhiza hookeri var. hirsuta]
                                                   [Balsamorhiza hookeri var. hookeri]
                                                   [Balsamorhiza hookeri var. lagocephala]
                                                   [Balsamorhiza hookeri var. neglecta]
                                                   [Balsamorhiza hookeri var. platylepis]
                                                   [Balsamorhiza macrolepis var. platylepis]
                                                   [Balsamorhiza platylepis]
                                             Balsamorhiza incana
                                             Balsamorhiza lanata
                                                   [Balsamorhiza hookeri var. lanata]
                                             Balsamorhiza macrolepis
                                                   [Balsamorhiza macrolepis var. macrolepis]
                                             Balsamorhiza macrophylla
                                                   [Balsamorhiza hookeri var. idahoensis]
                                                   [Balsamorhiza macrophylla var. idahoensis]
                                             Balsamorhiza rosea
                                             Balsamorhiza sagittata
                                             Balsamorhiza sericea
                                             Balsamorhiza serrata
                                     Baltimora
                                             Baltimora recta
                                     Barkleyanthus
                                             Barkleyanthus salicifolius
                                                   [Cineraria salicifolia]
                                     Bartlettia
                                             Bartlettia scaposa
                                     Bartlettina
                                     Bebbia
                                             Bebbia juncea
                                               Bebbia juncea var. aspera
                                               Bebbia juncea var. juncea
                                     Bellis
                                             Bellis integrifolia
                                             Bellis perennis
                                     Benitoa
                                             Benitoa occidentalis
                                                   [Lessingia occidentalis]
                                     Berkheya
                                             Berkheya heterophylla
                                     Berlandiera
                                             Berlandiera X betonicifolia
                                                   [Berlandiera betonicifolia]
                                                   [Berlandiera pumila var. scabrella]
                                                   [Berlandiera texana var. bentonicifolia]
                                                   [Berlandiera texana var. betonicifolia]
                                             Berlandiera X humilis
                                             Berlandiera X macrophylla
                                                   [Berlandiera lyrata var. macrophylla]
                                             Berlandiera lyrata
                                                   [Berlandiera incisa]
                                             Berlandiera monocephala
                                             Berlandiera pumila
                                                   [Berlandiera dealbata]
                                                   [Berlandiera pumila var. pumila]
                                                   [Berlandiera tomentosa var. dealbata]
                                                   [Berlandiera tomentosa]
                                             Berlandiera subacaulis
                                             Berlandiera texana
                                     Berthelotia
                                     Berylsimpsonia
                                             Berylsimpsonia vanillosma
                                                   [Proustia krugiana]
                                                   [Proustia vanillosma]
                                                   [Tephroseris atropurpurea]
                                     Bethencourtia
                                             Bethencourtia palmensis
                                     Bidens
                                           [Megalodonta]
                                             Bidens X magnidisca
                                             Bidens X micranthoides
                                             Bidens X multiceps
                                             Bidens alba
                                             Bidens amplectens
                                             Bidens amplissima
                                                   [Bidens cernua var. elata]
                                                   [Bidens elata]
                                             Bidens aristosa
                                                   [Bidens aristosa var. fritcheyi]
                                                   [Bidens aristosa var. mutica]
                                                   [Bidens aristosa var. retrorsa]
                                             Bidens asymmetrica
                                                   [Bidens gracilis]
                                                   [Bidens halawana]
                                             Bidens aurea
                                                   [Bidens aurea var. wrightii]
                                                   [Bidens ferulifolia]
                                                   [Bidens heterophylla]
                                                   [Coreopsis aurea]
                                                   [Coreopsis ferulifolia]
                                             Bidens beckii
                                                   [Megalodonta beckii var. beckii]
                                                   [Megalodonta beckii var. hendersonii]
                                                   [Megalodonta beckii var. oregonensis]
                                                   [Megalodonta beckii]
                                             Bidens bidentoides
                                                   [Bidens bidentoides var. mariana]
                                                   [Bidens mariana]
                                             Bidens bigelovii
                                                   [Bidens bigelovii var. angustiloba]
                                                   [Bidens bigelovii var. bigelovii]
                                             Bidens bipinnata
                                                   [Bidens bipinnata var. biternatoides]
                                             Bidens campylotheca
                                               Bidens campylotheca ssp. campylotheca
                                               Bidens campylotheca ssp. pentamera
                                                     [Bidens campylotheca var. pentamera]
                                               Bidens campylotheca ssp. waihoiensis
                                             Bidens cernua
                                                   [Bidens cernua var. cernua]
                                                   [Bidens cernua var. dentata]
                                                   [Bidens cernua var. elliptica]
                                                   [Bidens cernua var. integra]
                                                   [Bidens cernua var. minima]
                                                   [Bidens cernua var. oligodonta]
                                                   [Bidens cernua var. radiata]
                                                   [Bidens glaucescens]
                                             Bidens cervicata
                                                   [Bidens asplenioides]
                                                   [Bidens fecunda]
                                                   [Bidens ferax]
                                                   [Bidens stokesii]
                                             Bidens coartata
                                             Bidens comosa
                                             Bidens conjuncta
                                             Bidens connata
                                                   [Bidens connata var. ambiversa]
                                                   [Bidens connata var. anomala]
                                                   [Bidens connata var. fallax]
                                                   [Bidens connata var. gracilipes]
                                                   [Bidens connata var. inundata]
                                                   [Bidens connata var. petiolata]
                                                   [Bidens connata var. pinnata]
                                                   [Bidens connata var. submutica]
                                             Bidens cosmoides
                                                   [Bidens X dimidiata]
                                                   [Bidens cosmoides var. refracta]
                                             Bidens ctenophylla
                                             Bidens cynapiifolia
                                                   [Bidens bipinnata var. cynapiifolia]
                                                   [Bidens cynapiifolia var. portoricensis]
                                                   [Bidens cynapiifolia var. tenuis]
                                             Bidens degeneri
                                             Bidens discoidea
                                             Bidens distans
                                             Bidens eatonii
                                                   [Bidens eatonii var. fallax]
                                                   [Bidens eatonii var. illicita]
                                                   [Bidens eatonii var. interstes]
                                                   [Bidens eatonii var. kennebecensis]
                                                   [Bidens eatonii var. major]
                                                   [Bidens eatonii var. mutabilis]
                                                   [Bidens eatonii var. simulans]
                                             Bidens forbesii
                                               Bidens forbesii ssp. forbesii
                                                     [Bidens asymmetrica var. subocculata]
                                               Bidens forbesii ssp. kahiliensis
                                             Bidens frondosa
                                                   [Bidens frondosa var. anomala]
                                                   [Bidens frondosa var. caudata]
                                                   [Bidens frondosa var. pallida]
                                                   [Bidens frondosa var. stenodonta]
                                               Bidens frondosa var. puberula
                                               Bidens frondosa var. var frondosa
                                             Bidens gardneri
                                             Bidens graciloides
                                             Bidens hawaiensis
                                                   [Bidens skottsbergii var. conglutinata]
                                                   [Bidens skottsbergii var. pololuensis]
                                                   [Bidens skottsbergii]
                                             Bidens heterodoxa
                                                   [Bidens heterodoxa var. agnostica]
                                                   [Bidens heterodoxa var. atheistica]
                                                   [Bidens heterodoxa var. heterodoxa]
                                                   [Bidens heterodoxa var. monardifolia]
                                                   [Bidens heterodoxa var. orthodoxa]
                                                   [Bidens infirma]
                                                   [Bidens tripartita var. heterodoxa]
                                             Bidens heterosperma
                                             Bidens hillebrandiana
                                               Bidens hillebrandiana ssp. hillebrandiana
                                               Bidens hillebrandiana ssp. polycephala
                                             Bidens hyperborea
                                                   [Bidens hyperborea var. arcuans]
                                                   [Bidens hyperborea var. cathancensis]
                                                   [Bidens hyperborea var. colpophila]
                                                   [Bidens hyperborea var. gaspensis]
                                                   [Bidens hyperborea var. hyperborea]
                                                   [Bidens hyperborea var. laurentiana]
                                                   [Bidens hyperborea var. svensonii]
                                             Bidens laevis
                                                   [Bidens elegans]
                                                   [Bidens nashii]
                                                   [Helianthus laevis]
                                             Bidens lemmonii
                                             Bidens leptocephala
                                             Bidens macrocarpa
                                                   [Bidens macrocarpa var. ovatifolia]
                                             Bidens mauiensis
                                                   [Bidens awaluana]
                                                   [Bidens mauiensis var. ciliata]
                                                   [Bidens mauiensis var. cuneatoides]
                                                   [Bidens mauiensis var. forbesiana]
                                                   [Bidens mauiensis var. lanaiensis]
                                                   [Bidens mauiensis var. media]
                                             Bidens menziesii
                                               Bidens menziesii ssp. filiformis
                                                     [Bidens menziesii var. filiformis]
                                                     [Bidens menziesii var. leptondontia]
                                               Bidens menziesii ssp. menziesii
                                                     [Bidens menziesii var. lepida]
                                             Bidens micrantha
                                               Bidens micrantha ssp. ctenophylla
                                               Bidens micrantha ssp. kalealaha
                                                     [Bidens micrantha var. rudimentifera]
                                               Bidens micrantha ssp. micrantha
                                                     [Bidens degeneri var. apioides]
                                                     [Bidens micrantha var. caduca]
                                                     [Bidens micrantha var. laciniata]
                                                     [Bidens perversa var. aquilonalis]
                                                     [Bidens sandvicensis var. caduca]
                                                     [Bidens sandvicensis var. leiocarpa]
                                             Bidens mitis
                                                   [Bidens mitis var. leptophylla]
                                             Bidens molokaiensis
                                                   [Bidens cuneata]
                                             Bidens napaliensis
                                             Bidens nivea
                                             Bidens obtusiloba
                                             Bidens pentamera
                                             Bidens perversa
                                             Bidens pilosa
                                                   [Bidens alba var. radiata]
                                                   [Bidens odorata]
                                                   [Bidens pilosa var. bimucronata]
                                                   [Bidens pilosa var. minor]
                                                   [Bidens pilosa var. pilosa]
                                                   [Bidens pilosa var. radiata]
                                                   [Coreopsis alba]
                                             Bidens polylepis
                                                   [Bidens involucrata]
                                                   [Bidens polylepis var. retrorsa]
                                             Bidens populifolia
                                             Bidens pulchella
                                             Bidens reptans
                                               Bidens reptans var. reptans
                                             Bidens salicoides
                                             Bidens sandvicensis
                                               Bidens sandvicensis ssp. confusa
                                               Bidens sandvicensis ssp. sandvicensis
                                                     [Bidens sandvicensis var. antrorsa]
                                                     [Bidens sandvicensis var. imminuta]
                                                     [Bidens sandvicensis var. setosa]
                                             Bidens scandens
                                             Bidens squarrosa
                                             Bidens tenuisecta
                                             Bidens torta
                                                   [Bidens fulvescens]
                                                   [Bidens micrantha var. kaalana]
                                                   [Bidens waianensis]
                                             Bidens trichosperma
                                                   [Bidens coronata var. brachyodonta]
                                                   [Bidens coronata var. tenuiloba]
                                                   [Bidens coronata var. trichosperma]
                                                   [Bidens coronata]
                                             Bidens tripartita
                                                   [Bidens acuta]
                                                   [Bidens comosa]
                                             Bidens urbanii
                                                   [Bidens reptans var. urbanii]
                                             Bidens valida
                                             Bidens vulgata
                                                   [Bidens frondosa var. puberula]
                                                   [Bidens puberula]
                                                   [Bidens vulgata var. puberula]
                                                   [Bidens vulgata var. schizantha]
                                             Bidens waimeana
                                             Bidens wiebkei
                                                   [Bidens nematocera]
                                     Bigelovia
                                     Bigelowia
                                             Bigelowia nudata
                                               Bigelowia nudata var. australis
                                                     [Bigelowia nudata ssp. australis]
                                               Bigelowia nudata var. nudata
                                                     [Bigelowia nudata ssp. nudata]
                                             Bigelowia nuttallii
                                             Bigelowia virgata
                                     Blennosperma
                                             Blennosperma bakeri
                                             Blennosperma nanum
                                               Blennosperma nanum var. nanum
                                               Blennosperma nanum var. robustum
                                     Blepharipappus
                                             Blepharipappus scaber
                                                   [Blepharipappus scaber ssp. laevis]
                                                   [Blepharipappus scaber ssp. scaber]
                                     Blepharizonia
                                             Blepharizonia laxa
                                                   [Blepharizonia plumosa ssp. viscida]
                                             Blepharizonia plumosa
                                               Blepharizonia plumosa ssp. plumosa
                                     Blumea
                                             Blumea balsamifera
                                             Blumea lacera
                                             Blumea laciniata
                                             Blumea sessiliflora
                                             Blumea viscosa
                                                   [Eschenbachia lyrata]
                                     Boebera
                                     Bolophyta
                                             Bolophyta alpina
                                             Bolophyta ligulata
                                             Bolophyta tetraneuris
                                     Boltonia
                                             Boltonia apalachicolensis
                                             Boltonia asteroides
                                               Boltonia asteroides var. asteroides
                                                     [Boltonia asteroides var. glastifolia]
                                               Boltonia asteroides var. latisquama
                                               Boltonia asteroides var. recognita
                                                     [Boltonia latisquama var. microcephala]
                                                     [Boltonia latisquama var. occidentalis]
                                                     [Boltonia latisquama var. recognita]
                                             Boltonia caroliniana
                                                   [Boltonia ravenelii]
                                             Boltonia decurrens
                                                   [Boltonia asteroides var. decurrens]
                                                   [Boltonia latisquama var. decurrens]
                                             Boltonia diffusa
                                               Boltonia diffusa var. diffusa
                                               Boltonia diffusa var. interior
                                             Boltonia interior
                                             Boltonia latisquama
                                             Boltonia lautureana
                                             Boltonia recognita
                                     Bombycilaena
                                             Bombycilaena californica
                                     Borrichia
                                             Borrichia X cubana
                                             Borrichia arborescens
                                                   [Buphthalmum arborescens]
                                             Borrichia frutescens
                                     Brachyactis
                                               Brachyactis ciliata ssp. angusta
                                             Brachyactis frondosa
                                     Brachychaeta
                                     Brachyris
                                     Bracyrhamphus
                                     Bradburia
                                             Bradburia hirtella
                                                   [Chrysopsis texana]
                                             Bradburia pilosa
                                                   [Chrysopsis nuttallii]
                                     Brauneria
                                     Breea
                                             Breea arvensis
                                             Breea incana
                                     Brickellia
                                             Brickellia amplexicaulis
                                                   [Brickellia amplexicaulis var. amplexicaulis]
                                                   [Brickellia amplexicaulis var. lanceolata]
                                             Brickellia arguta
                                             Brickellia atractyloides
                                               Brickellia atractyloides var. arguta
                                                     [Brickellia arguta var. arguta]
                                               Brickellia atractyloides var. atractyloides
                                               Brickellia atractyloides var. odontolepis
                                                     [Brickellia arguta var. odontolepis]
                                             Brickellia baccharidea
                                             Brickellia betonicifolia
                                             Brickellia brachiata
                                             Brickellia brachyphylla
                                                   [Brickellia brachyphylla var. brachyphylla]
                                               Brickellia brachyphylla var. hinckleyi
                                               Brickellia brachyphylla var. terlinguensis
                                             Brickellia californica
                                                   [Brickellia californica var. californica]
                                                   [Brickellia californica var. jepsonii]
                                                   [Bulbostylis californica]
                                             Brickellia chenopodina
                                             Brickellia conduplicata
                                             Brickellia cordifolia
                                                   [Coleosanthus cordifolius]
                                             Brickellia coulteri
                                               Brickellia coulteri var. brachiata
                                               Brickellia coulteri var. coulteri
                                             Brickellia cylindracea
                                             Brickellia dentata
                                             Brickellia desertorum
                                                   [Brickellia californica var. desertorum]
                                                   [Coleosanthus desertorum]
                                             Brickellia diffusa
                                             Brickellia eupatorioides
                                               Brickellia eupatorioides var. chlorolepis
                                                     [Brickellia chlorolepis]
                                                     [Brickellia leptophylla var. mexicana]
                                                     [Brickellia rosemarinifolia var. chlorolepis]
                                                     [Brickellia rosmarinifolia ssp. chlorolepis]
                                                     [Brickellia shaffneri]
                                                     [Kuhnia chlorolepis]
                                                     [Kuhnia eupatorioides var. chlorolepis]
                                                     [Kuhnia leptophylla var. mexicana]
                                                     [Kuhnia microphylla]
                                                     [Kuhnia rosemarinifolia var. chlorolepis]
                                                     [Kuhnia rosmarinifolia var. chlorolepis]
                                                     [Kuhnia shaffneri]
                                               Brickellia eupatorioides var. corymbulosa
                                                     [Kuhnia eupatorioides var. corymbulosa]
                                                     [Kuhnia hitchcockii]
                                               Brickellia eupatorioides var. eupatorioides
                                                     [Brickellia rosemarinifolia]
                                                     [Brickellia rosmarinifolia]
                                                     [Kuhnia eupatorioides var. angustifolia]
                                                     [Kuhnia eupatorioides var. pyramidalis]
                                                     [Kuhnia eupatorioides]
                                                     [Kuhnia glutinosa]
                                                     [Kuhnia rosemarinifolia]
                                                     [Kuhnia rosmarinifolia]
                                               Brickellia eupatorioides var. floridana
                                                     [Brickellia eupatorioides var. gracilis]
                                                     [Brickellia mosieri]
                                                     [Kuhnia eupatorioides var. floridana]
                                                     [Kuhnia eupatorioides var. gracilis]
                                                     [Kuhnia mosieri]
                                               Brickellia eupatorioides var. gracillima
                                                     [Brickellia leptophylla]
                                                     [Kuhnia eupatorioides var. gracillima]
                                                     [Kuhnia leptophylla]
                                               Brickellia eupatorioides var. texana
                                                     [Brickellia eupatorioides var. ozarkana]
                                                     [Kuhnia eupatorioides var. ozarkana]
                                                     [Kuhnia eupatorioides var. texana]
                                             Brickellia fendleri
                                             Brickellia floribunda
                                             Brickellia frutescens
                                             Brickellia grandiflora
                                                   [Brickellia grandiflora var. petiolaris]
                                                   [Coleosanthus grandiflorus]
                                             Brickellia greenei
                                             Brickellia hinckleyi
                                               Brickellia hinckleyi var. hinckleyi
                                               Brickellia hinckleyi var. terlinguensis
                                             Brickellia incana
                                             Brickellia knappiana
                                             Brickellia laciniata
                                             Brickellia lemmonii
                                               Brickellia lemmonii var. conduplicata
                                               Brickellia lemmonii var. lemmonii
                                                     [Brickellia lemmonii var. nelsonii]
                                                     [Brickellia lemmonii var. wootonii]
                                             Brickellia longifolia
                                               Brickellia longifolia var. longifolia
                                               Brickellia longifolia var. multiflora
                                                     [Brickellia multiflora]
                                             Brickellia microphylla
                                               Brickellia microphylla var. microphylla
                                                     [Brickellia microphylla var. watsonii]
                                               Brickellia microphylla var. scabra
                                               Brickellia microphylla ssp. scabra
                                             Brickellia nelsonii
                                             Brickellia nevinii
                                             Brickellia oblongifolia
                                               Brickellia oblongifolia var. linifolia
                                                     [Brickellia linifolia]
                                               Brickellia oblongifolia var. oblongifolia
                                                     [Brickellia oblongifolia var. typica]
                                             Brickellia parvula
                                             Brickellia pringlei
                                             Brickellia rosmarinifolia
                                               Brickellia rosmarinifolia ssp. chlorolepis
                                             Brickellia rusbyi
                                             Brickellia scabra
                                             Brickellia shineri
                                             Brickellia simplex
                                             Brickellia squamulosa
                                             Brickellia venosa
                                                   [Coleosanthus venosus]
                                             Brickellia veronicifolia
                                                   [Brickellia veronicifolia var. petrophila]
                                                   [Brickellia veronicifolia var. veronicifolia]
                                                   [Eupatorium veronicifolium]
                                             Brickellia viejensis
                                             Brickellia watsonii
                                     Brickelliastrum
                                             Brickelliastrum fendleri
                                     Brintonia
                                             Brintonia discoidea
                                     Buphthalmum
                                             Buphthalmum salicifolium
                                     Cacaliopsis
                                             Cacaliopsis nardosmia
                                                   [Cacalia nardosmia var. glabrata]
                                                   [Cacalia nardosmia]
                                                   [Cacaliopsis nardosmia var. glabrata]
                                                   [Luina nardosmia var. glabrata]
                                                   [Luina nardosmia]
                                     Calea
                                     Calendula
                                             Calendula arvensis
                                             Calendula officinalis
                                                   [Calendula officinalis var. prolifera]
                                     Calliopsis
                                     Callistephus
                                             Callistephus chinensis
                                     Calotis
                                             Calotis cuneifolia
                                     Calycadenia
                                             Calycadenia fremontii
                                                   [Calycadenia ciliosa]
                                                   [Hemizonia fremontii]
                                                   [Hemizonia multiglandulosa var. sparsa]
                                             Calycadenia hooveri
                                             Calycadenia micrantha
                                                   [Calycadenia truncata ssp. microcephala]
                                             Calycadenia mollis
                                                   [Hemizonia mollis]
                                             Calycadenia multiglandulosa
                                                   [Calycadenia campestris]
                                                   [Calycadenia hispida ssp. hispida]
                                                   [Calycadenia hispida ssp. reducta]
                                                   [Calycadenia hispida]
                                                   [Calycadenia multiglandulosa ssp. bicolor]
                                                   [Calycadenia multiglandulosa ssp. cephalotes]
                                                   [Calycadenia multiglandulosa ssp. robusta]
                                                   [Hemizonia hispida]
                                             Calycadenia oppositifolia
                                                   [Hemizonia oppositifolia]
                                             Calycadenia pauciflora
                                                   [Calycadenia elegans]
                                                   [Calycadenia pauciflora var. elegans]
                                                   [Calycadenia ramulosa]
                                                   [Hemizonia pauciflora]
                                             Calycadenia spicata
                                                   [Hemizonia spicata]
                                             Calycadenia truncata
                                                   [Calycadenia scabrella]
                                                   [Calycadenia truncata ssp. scabrella]
                                                   [Calycadenia truncata var. scabrella]
                                                   [Hemizonia scabrella]
                                                   [Lagophylla scabrella]
                                               Calycadenia truncata ssp. truncata
                                             Calycadenia villosa
                                                   [Hemizonia douglasii]
                                     Calycoseris
                                             Calycoseris parryi
                                             Calycoseris wrightii
                                     Calymmandra
                                     Calyptocarpus
                                             Calyptocarpus vialis
                                                   [Calyptocarpus blepharolepis]
                                                   [Synedrella vialis]
                                                   [Synedrellopsis grisebachii]
                                     Canadanthus
                                             Canadanthus modestus
                                                   [Aster unalaschkensis var. major]
                                                   [Weberaster modestus]
                                     Carduus
                                             Carduus X orthocephalus
                                             Carduus acanthoides
                                               Carduus acanthoides ssp. acanthoides
                                             Carduus araneosus
                                             Carduus crispus
                                             Carduus macounii
                                             Carduus marianus
                                             Carduus nutans
                                                   [Carduus macrocephalus]
                                                   [Carduus macrolepis]
                                                   [Carduus nutans ssp. leiophyllus]
                                                   [Carduus nutans ssp. macrocephalus]
                                                   [Carduus nutans ssp. nutans]
                                                   [Carduus nutans var. leiophyllus]
                                                   [Carduus nutans var. macrocephalus]
                                                   [Carduus nutans var. vestitus]
                                                   [Carduus thoermeri]
                                               Carduus nutans ssp. macrolepis
                                             Carduus pinetorum
                                             Carduus pulchellus
                                             Carduus pumilus
                                             Carduus pycnocephalus
                                             Carduus smallii
                                             Carduus spathulatus
                                             Carduus spinosissimus
                                             Carduus tenuiflorus
                                             Carduus truncatus
                                     Carlina
                                             Carlina vulgaris
                                               Carlina vulgaris ssp. vulgaris
                                                     [Carlina vulgaris ssp. longifolia]
                                     Carlquistia
                                             Carlquistia muirii
                                                   [Raillardella muirii]
                                                   [Raillardiopsis muirii]
                                     Carminatia
                                             Carminatia tenuiflora
                                     Carphephorus
                                           [Litrisa]
                                           [Trilisa]
                                             Carphephorus bellidifolius
                                             Carphephorus carnosus
                                                   [Litrisa carnosa]
                                             Carphephorus corymbosus
                                             Carphephorus odoratissimus
                                                   [Trilisa odoratissima]
                                               Carphephorus odoratissimus var. odoratissimus
                                               Carphephorus odoratissimus var. subtropicanus
                                             Carphephorus paniculatus
                                                   [Trilisa paniculata]
                                             Carphephorus pseudoliatris
                                             Carphephorus tomentosus
                                                   [Carphephorus tomentosus var. walteri]
                                     Carphochaete
                                             Carphochaete bigelovii
                                     Carthamus
                                           [Cathamus]
                                             Carthamus creticus
                                                   [Carthamus baeticus]
                                                   [Carthamus lanatus ssp. baeticus]
                                                   [Carthamus lanatus ssp. creticus]
                                                   [Cathamus baeticus]
                                             Carthamus laevis
                                             Carthamus lanatus
                                                   [Carthamus lanatus ssp. lanatus]
                                                   [Cathamus lanatus]
                                             Carthamus leucocaulos
                                             Carthamus oxyacanthus
                                                   [Carthamus oxyacantha]
                                             Carthamus tinctorius
                                                   [Cathamus tinctorius]
                                     Castalis
                                     Catananche
                                             Catananche caerulea
                                     Celmisia
                                             Celmisia spectabilis
                                     Centaurea
                                           [Cnicus]
                                             Centaurea X moncktonii
                                                   [Centaurea debeauxii ssp. thuillieri]
                                                   [Centaurea nigra var. radiata]
                                                   [Centaurea pratensis]
                                             Centaurea X pouzinii
                                             Centaurea X psammogena
                                             Centaurea americana
                                             Centaurea aspera
                                             Centaurea babylonica
                                             Centaurea benedicta
                                                   [Cirsium pugnax]
                                                   [Cnicus benedictus]
                                             Centaurea besseriana
                                             Centaurea biebersteinii
                                             Centaurea bovina
                                             Centaurea calcitrapa
                                             Centaurea calcitrapoides
                                             Centaurea cineraria
                                             Centaurea cyanus
                                                   [Leucacantha cyanus]
                                             Centaurea dealbata
                                             Centaurea debeauxii
                                                   [Centaurea debauxii]
                                             Centaurea depressa
                                             Centaurea diffusa
                                                   [Acosta diffusa]
                                             Centaurea diluta
                                             Centaurea eriophora
                                                   [Jacea pratensis]
                                             Centaurea hypoleuca
                                             Centaurea iberica
                                             Centaurea jacea
                                             Centaurea macrocephala
                                             Centaurea maculosa
                                             Centaurea melitensis
                                             Centaurea montana
                                                   [Centaurea montana var. alba]
                                             Centaurea moschata
                                             Centaurea muricata
                                             Centaurea nervosa
                                                   [Centaurea uniflora ssp. nervosa]
                                             Centaurea nigra
                                             Centaurea nigrescens
                                                   [Centaurea dubia ssp. vochinensis]
                                                   [Centaurea dubia]
                                                   [Centaurea transalpina]
                                                   [Centaurea vochinensis]
                                             Centaurea orientalis
                                             Centaurea ovina
                                               Centaurea ovina ssp. besseriana
                                             Centaurea paniculata
                                             Centaurea phrygia
                                                   [Centaurea austriaca]
                                             Centaurea picris
                                             Centaurea pratensis
                                             Centaurea repens
                                             Centaurea rothrockii
                                             Centaurea salmantica
                                             Centaurea scabiosa
                                                   [Centaurea scabiosa var. vertesensis]
                                             Centaurea solstitialis
                                                   [Leucantha solstitialis]
                                             Centaurea squarrosa
                                             Centaurea stoebe
                                               Centaurea stoebe ssp. micranthos
                                               Centaurea stoebe ssp. stoebe
                                             Centaurea sulphurea
                                             Centaurea trichocephala
                                             Centaurea triumfettii
                                                   [Centaurea variegata]
                                             Centaurea uniflora
                                             Centaurea virgata
                                               Centaurea virgata ssp. squarrosa
                                                     [Centaurea variegata var. squarrosa]
                                                     [Centaurea virgata var. squarrosa]
                                               Centaurea virgata ssp. virgata
                                     Centipeda
                                             Centipeda minima
                                     Centratherum
                                             Centratherum punctatum
                                     Centromadia
                                             Centromadia fitchii
                                                   [Hemizonia fitchii]
                                             Centromadia parryi
                                               Centromadia parryi ssp. australis
                                                     [Hemizonia parryi ssp. australis]
                                               Centromadia parryi ssp. congdonii
                                                     [Hemizonia parryi ssp. congdonii]
                                               Centromadia parryi ssp. parryi
                                                     [Hemizonia parryi ssp. parryi]
                                               Centromadia parryi ssp. rudis
                                                     [Hemizonia parryi ssp. rudis]
                                             Centromadia pungens
                                               Centromadia pungens ssp. laevis
                                                     [Hemizonia pugens var. laevis]
                                                     [Hemizonia pungens ssp. laevis]
                                               Centromadia pungens ssp. pungens
                                                     [Centromadia pungens ssp. maritima]
                                                     [Centromadia pungens ssp. septentrionalis]
                                                     [Hemizonia pugens var. maritima]
                                                     [Hemizonia pugens var. pugens]
                                                     [Hemizonia pugens var. septentrionalis]
                                                     [Hemizonia pungens ssp. maritima]
                                                     [Hemizonia pungens ssp. pungens]
                                                     [Hemizonia pungens ssp. septentrionalis]
                                                     [Hemizonia pungens var. septentrionalis]
                                     Chaenactis
                                             Chaenactis alpigena
                                             Chaenactis alpina
                                             Chaenactis artemisiifolia
                                             Chaenactis carphoclinia
                                               Chaenactis carphoclinia var. carphoclinia
                                                     [Chaenactis carphoclinia var. attenuata]
                                               Chaenactis carphoclinia var. peirsonii
                                             Chaenactis cusickii
                                             Chaenactis douglasii
                                               Chaenactis douglasii var. alpina
                                                     [Chaenactis alpina var. leucopsis]
                                                     [Chaenactis alpina var. rubella]
                                                     [Chaenactis alpina]
                                                     [Chaenactis leucopsis]
                                                     [Chaenactis minuscula]
                                                     [Chaenactis panamintensis]
                                               Chaenactis douglasii var. douglasii
                                                     [Chaenactis angustifolia]
                                                     [Chaenactis brachiata var. stansburiana]
                                                     [Chaenactis brachiata]
                                                     [Chaenactis cineria]
                                                     [Chaenactis douglasii var. achilleifolia]
                                                     [Chaenactis douglasii var. glandulosa]
                                                     [Chaenactis douglasii var. montana]
                                                     [Chaenactis douglasii var. nana]
                                                     [Chaenactis douglasii var. rubricaulis]
                                                     [Chaenactis douglasii var. typicus]
                                                     [Chaenactis humilis]
                                                     [Chaenactis ramosa]
                                                     [Chaenactis rubricaulis]
                                                     [Chaenactis suksdorfii]
                                             Chaenactis evermannii
                                                   [Chaenactis nevadensis var. mainsiana]
                                             Chaenactis fremontii
                                             Chaenactis glabriuscula
                                               Chaenactis glabriuscula var. glabriuscula
                                                     [Chaenactis glabriuscula var. aurea]
                                                     [Chaenactis glabriuscula var. curta]
                                                     [Chaenactis glabriuscula var. tenuifolia]
                                               Chaenactis glabriuscula var. heterocarpha
                                                     [Chaenactis glabriuscula var. gracilenta]
                                                     [Chaenactis tanacetifolia var. gracilenta]
                                               Chaenactis glabriuscula var. lanosa
                                                     [Chaenactis glabriuscula var. denudata]
                                               Chaenactis glabriuscula var. megacephala
                                               Chaenactis glabriuscula var. orcuttiana
                                                     [Chaenactis tenuifolia var. orcuttiana]
                                             Chaenactis heterocarpha
                                             Chaenactis lanosa
                                             Chaenactis macrantha
                                             Chaenactis nevadensis
                                             Chaenactis nevii
                                             Chaenactis orcuttiana
                                             Chaenactis parishii
                                             Chaenactis santolinoides
                                                   [Chaenactis santolinoides var. indurata]
                                             Chaenactis stevioides
                                                   [Chaenactis furcata]
                                                   [Chaenactis gillespiei]
                                                   [Chaenactis latifolia]
                                                   [Chaenactis mexicana]
                                                   [Chaenactis stevioides var. brachypappa]
                                                   [Chaenactis stevioides var. thornberi]
                                             Chaenactis suffrutescens
                                                   [Chaenactis suffrutescens var. incana]
                                             Chaenactis tanacetifolia
                                             Chaenactis tenuifolia
                                             Chaenactis thompsonii
                                             Chaenactis xantiana
                                     Chaetadelpha
                                           [Chaetadelphia]
                                             Chaetadelpha wheeleri
                                                   [Chaetadelphia wheeleri]
                                     Chaetopappa
                                           [Leucelene]
                                             Chaetopappa alsinoides
                                             Chaetopappa asteroides
                                               Chaetopappa asteroides var. asteroides
                                               Chaetopappa asteroides var. grandis
                                             Chaetopappa aurea
                                             Chaetopappa bellidiflora
                                             Chaetopappa bellidifolia
                                                   [Keerlia bellidifolia]
                                             Chaetopappa bellioides
                                                   [Chaetopappa bellioides var. hirticaulis]
                                                   [Diplostelma bellioides]
                                             Chaetopappa effusa
                                                   [Keerlia effusa]
                                             Chaetopappa elegans
                                             Chaetopappa ericoides
                                                   [Aster arenosus]
                                                   [Aster bellus]
                                                   [Aster ericaefolius]
                                                   [Aster hirtifolius]
                                                   [Aster leucelene]
                                                   [Inula ericoides]
                                                   [Leucelene ericoides]
                                             Chaetopappa exilis
                                             Chaetopappa fragilis
                                             Chaetopappa hersheyi
                                             Chaetopappa imberbis
                                                   [Chaetopappa asteroides var. imberbis]
                                             Chaetopappa lyonii
                                             Chaetopappa parryi
                                     Chamaechaenactis
                                             Chamaechaenactis scaposa
                                                   [Chaenactis scaposa]
                                                   [Chamaechaenactis scaposa var. parva]
                                                   [Chamaechaenactis scaposa var. scaposa]
                                     Chamaemelum
                                             Chamaemelum fuscatum
                                             Chamaemelum nobile
                                     Chaptalia
                                             Chaptalia albicans
                                             Chaptalia dentata
                                             Chaptalia nutans
                                                   [Tussilago nutans]
                                             Chaptalia texana
                                                   [Chaptalia nutans var. texana]
                                             Chaptalia tomentosa
                                     Chloracantha
                                             Chloracantha spinosa
                                                   [Chloracantha spinosa var. spinosa]
                                                   [Leucosyris spinosa]
                                     Chlorocrepis
                                             Chlorocrepis albiflora
                                             Chlorocrepis fendleri
                                               Chlorocrepis tristis ssp. gracilis
                                     Chondrilla
                                             Chondrilla juncea
                                     Chondrophora
                                             Chondrophora nudata
                                             Chondrophora virgata
                                     Chorisiva
                                             Chorisiva nevadensis
                                     Chromolaena
                                             Chromolaena bigelovii
                                             Chromolaena borinquensis
                                                   [Osmia borinquensis]
                                             Chromolaena corymbosa
                                                   [Osmia corymbosa]
                                             Chromolaena frustrata
                                                   [Osmia frustrata]
                                             Chromolaena geraniifolia
                                                   [Osmia geraniifolia]
                                             Chromolaena impetiolaris
                                             Chromolaena integrifolia
                                             Chromolaena ivifolia
                                                   [Osmia ivifolia]
                                             Chromolaena macrodon
                                             Chromolaena odorata
                                                   [Osmia odorata]
                                             Chromolaena oteroi
                                             Chromolaena sinuata
                                                   [Osmia sinuata]
                                             Chromolaena trigonocarpa
                                                   [Chromolaena mononeura]
                                     Chrysactinia
                                             Chrysactinia mexicana
                                     Chrysanthellum
                                             Chrysanthellum americanum
                                                   [Chrysanthellum americana]
                                     Chrysanthemoides
                                             Chrysanthemoides monilifera
                                     Chrysanthemum
                                             Chrysanthemum X morifolium
                                                   [Chrysanthemum morifolium]
                                                   [Dendranthema X grandiflorum]
                                                   [Dendranthema grandiflorum]
                                                   [Dendranthema morifolium]
                                             Chrysanthemum alpinum
                                             Chrysanthemum arcticum
                                               Chrysanthemum arcticum ssp. polare
                                               Chrysanthemum arcticum var. polare
                                             Chrysanthemum carinatum
                                             Chrysanthemum cinerariifolium
                                                   [Pyrethrum cinerariifolium]
                                                   [Tanacetum cinerariifolium]
                                             Chrysanthemum coccineum
                                             Chrysanthemum coronarium
                                               Chrysanthemum coronarium var. coronarium
                                               Chrysanthemum coronarium var. spatiosum
                                             Chrysanthemum frutescens
                                             Chrysanthemum indicum
                                             Chrysanthemum integrifolium
                                             Chrysanthemum majus
                                             Chrysanthemum nipponicum
                                             Chrysanthemum segetum
                                             Chrysanthemum serotinum
                                             Chrysanthemum spatiosum
                                             Chrysanthemum uliginosum
                                     Chrysocoma
                                             Chrysocoma nudata
                                     Chrysogonum
                                             Chrysogonum australe
                                             Chrysogonum virginianum
                                               Chrysogonum virginianum var. australe
                                               Chrysogonum virginianum var. brevistolon
                                               Chrysogonum virginianum var. virginianum
                                                     [Chrysogonum virginianum var. dentatum]
                                     Chrysoma
                                             Chrysoma pauciflosculosa
                                                   [Chrysoma solidaginoides]
                                     Chrysopsis
                                             Chrysopsis adenolepis
                                             Chrysopsis arenicola
                                             Chrysopsis aspera
                                             Chrysopsis cruiseana
                                             Chrysopsis decumbens
                                             Chrysopsis floridana
                                                   [Chrysopsis mariana var. floridana]
                                                   [Heterotheca mariana ssp. floridana]
                                             Chrysopsis gigantea
                                             Chrysopsis godfreyi
                                             Chrysopsis gossypina
                                               Chrysopsis gossypina ssp. cruiseana
                                               Chrysopsis gossypina ssp. gossypina
                                               Chrysopsis gossypina ssp. hyssopifolia
                                             Chrysopsis graminifolia
                                             Chrysopsis hyssopifolia
                                             Chrysopsis lanuginosa
                                             Chrysopsis latisquamea
                                             Chrysopsis linearifolia
                                               Chrysopsis linearifolia ssp. dressii
                                               Chrysopsis linearifolia ssp. linearifolia
                                             Chrysopsis longii
                                             Chrysopsis mariana
                                                   [Chrysopsis mariana var. macradenia]
                                                   [Heterotheca mariana var. macradenia]
                                                   [Inula mariana]
                                             Chrysopsis microcephala
                                             Chrysopsis mixta
                                             Chrysopsis nervosa
                                             Chrysopsis scabrella
                                             Chrysopsis subulata
                                                   [Heterotheca hyssopifolia var. subulata]
                                             Chrysopsis tracyi
                                             Chrysopsis trichophylla
                                     Chrysothamnus
                                           [Vanclevea]
                                             Chrysothamnus baileyi
                                             Chrysothamnus depressus
                                                   [Ericameria depressa]
                                             Chrysothamnus eremobius
                                                   [Ericameria eremobia]
                                             Chrysothamnus frigidus
                                             Chrysothamnus gramineus
                                             Chrysothamnus graveolens
                                             Chrysothamnus greenei
                                                   [Chrysothamnus greenei ssp. filifolius]
                                                   [Chrysothamnus greenei var. filifolius]
                                                   [Ericameria filifolia]
                                               Chrysothamnus greenei ssp. greenei
                                               Chrysothamnus greenei ssp. filifolius
                                             Chrysothamnus howardii
                                             Chrysothamnus humilis
                                                   [Chrysothamnus viscidiflorus ssp. humilis]
                                                   [Chrysothamnus viscidiflorus var. humilis]
                                                   [Ericameria humilis]
                                             Chrysothamnus linifolius
                                             Chrysothamnus molestus
                                                   [Chrysothamnus viscidiflorus var. molestus]
                                                   [Ericameria molesta]
                                             Chrysothamnus nauseosus
                                               Chrysothamnus nauseosus ssp. albicaulis
                                               Chrysothamnus nauseosus ssp. arenarius
                                               Chrysothamnus nauseosus ssp. bernardinus
                                               Chrysothamnus nauseosus ssp. ceruminosus
                                               Chrysothamnus nauseosus ssp. gnaphalodes
                                               Chrysothamnus nauseosus ssp. iridis
                                               Chrysothamnus nauseosus ssp. junceus
                                               Chrysothamnus nauseosus ssp. latisquameus
                                               Chrysothamnus nauseosus ssp. mohavensis
                                               Chrysothamnus nauseosus ssp. nanus
                                               Chrysothamnus nauseosus ssp. nitidus
                                               Chrysothamnus nauseosus ssp. pinifolius
                                               Chrysothamnus nauseosus ssp. psilocarpus
                                               Chrysothamnus nauseosus ssp. salicifolius
                                               Chrysothamnus nauseosus ssp. speciosus
                                               Chrysothamnus nauseosus ssp. texensis
                                               Chrysothamnus nauseosus ssp. turbinatus
                                               Chrysothamnus nauseosus ssp. washoensis
                                               Chrysothamnus nauseosus var. abbreviatus
                                               Chrysothamnus nauseosus var. albicaulis
                                               Chrysothamnus nauseosus var. arenarius
                                               Chrysothamnus nauseosus var. artus
                                               Chrysothamnus nauseosus var. bigelovii
                                               Chrysothamnus nauseosus var. consimilis
                                               Chrysothamnus nauseosus var. glabratus
                                               Chrysothamnus nauseosus var. glareosus
                                               Chrysothamnus nauseosus var. gnaphalodes
                                               Chrysothamnus nauseosus var. graveolens
                                               Chrysothamnus nauseosus var. hololeucus
                                               Chrysothamnus nauseosus var. iridis
                                               Chrysothamnus nauseosus var. junceus
                                               Chrysothamnus nauseosus var. latisquameus
                                               Chrysothamnus nauseosus var. leiospermus
                                               Chrysothamnus nauseosus var. linearifolius
                                               Chrysothamnus nauseosus var. mohavensis
                                               Chrysothamnus nauseosus var. nanus
                                               Chrysothamnus nauseosus var. nauseosus
                                               Chrysothamnus nauseosus var. nitidus
                                               Chrysothamnus nauseosus var. oreophilus
                                               Chrysothamnus nauseosus var. petrophilus
                                               Chrysothamnus nauseosus var. psilocarpus
                                               Chrysothamnus nauseosus var. salicifolius
                                               Chrysothamnus nauseosus var. speciosus
                                               Chrysothamnus nauseosus var. turbinatus
                                               Chrysothamnus nauseosus var. typicus
                                               Chrysothamnus nauseosus var. washoensis
                                               Chrysothamnus nauseosus ssp. bigelovii
                                               Chrysothamnus nauseosus ssp. consimilis
                                               Chrysothamnus nauseosus ssp. graveolens
                                               Chrysothamnus nauseosus ssp. hololeucus
                                               Chrysothamnus nauseosus ssp. leiospermus
                                               Chrysothamnus nauseosus ssp. nauseosus
                                             Chrysothamnus parryi
                                               Chrysothamnus parryi ssp. asper
                                               Chrysothamnus parryi ssp. imulus
                                               Chrysothamnus parryi ssp. latior
                                               Chrysothamnus parryi ssp. monocephalus
                                               Chrysothamnus parryi ssp. montanus
                                               Chrysothamnus parryi ssp. nevadensis
                                               Chrysothamnus parryi ssp. salmonensis
                                               Chrysothamnus parryi ssp. typicus
                                               Chrysothamnus parryi ssp. vulcanicus
                                               Chrysothamnus parryi var. affinis
                                               Chrysothamnus parryi var. asper
                                               Chrysothamnus parryi var. attenuatus
                                               Chrysothamnus parryi var. howardii
                                               Chrysothamnus parryi var. monocephalus
                                               Chrysothamnus parryi var. nevadensis
                                               Chrysothamnus parryi var. vulcanicus
                                               Chrysothamnus parryi ssp. affinis
                                               Chrysothamnus parryi ssp. attenuatus
                                               Chrysothamnus parryi ssp. howardii
                                               Chrysothamnus parryi ssp. parryi
                                             Chrysothamnus pulchellus
                                               Chrysothamnus pulchellus ssp. baileyi
                                             Chrysothamnus scopulorum
                                                   [Haplopappus scopulorum var. hirtellus]
                                                   [Haplopappus scopulorum]
                                                   [Hesperodoria scopulorum]
                                             Chrysothamnus spathulatus
                                             Chrysothamnus stylosus
                                                   [Grindelia stylosa]
                                                   [Vanclevea stylosa]
                                             Chrysothamnus vaseyi
                                                   [Bigelovia vaseyi]
                                                   [Ericameria vaseyi]
                                             Chrysothamnus viscidiflorus
                                               Chrysothamnus viscidiflorus ssp. linifolius
                                               Chrysothamnus viscidiflorus ssp. planifolius
                                                     [Ericameria viscidiflora ssp. planifolia]
                                               Chrysothamnus viscidiflorus ssp. puberulus
                                                     [Chrysothamnus viscidiflorus var. puberulus]
                                                     [Ericameria viscidiflora ssp. puberula]
                                               Chrysothamnus viscidiflorus var. linifolius
                                               Chrysothamnus viscidiflorus var. ludens
                                             Chrysothamnus viscidiflorus ssp elegans (Greene) Hall & Clement
                                             Chrysothamnus viscidiflorus ssp latifolius (D. C. Eaton) Hall &
                                             Chrysothamnus viscidiflorus ssp puberulus (D. C. Eaton) Hall &
                                               Chrysothamnus viscidiflorus ssp. axillaris
                                                     [Chrysothamnus axillaris]
                                                     [Ericameria viscidiflora ssp. axillaris]
                                               Chrysothamnus viscidiflorus ssp. lanceolatus
                                                     [Chrysothamnus viscidiflorus ssp. elegans]
                                                     [Chrysothamnus viscidiflorus var. elegans]
                                                     [Chrysothamnus viscidiflorus var. lanceolatus]
                                                     [Ericameria viscidiflora ssp. lanceolata]
                                               Chrysothamnus viscidiflorus ssp. pumilus
                                               Chrysothamnus viscidiflorus ssp. stenophyllus
                                               Chrysothamnus viscidiflorus ssp. viscidiflorus
                                                     [Chrysothamnus viscidiflorus ssp. latifolius]
                                                     [Chrysothamnus viscidiflorus ssp. pumilus]
                                                     [Chrysothamnus viscidiflorus ssp. stenophyllus]
                                                     [Chrysothamnus viscidiflorus ssp. typicus]
                                                     [Chrysothamnus viscidiflorus var. pumilus]
                                                     [Chrysothamnus viscidiflorus var. typicus]
                                                     [Ericameria viscidiflora var. latifolia]
                                                     [Ericameria viscidiflora var. stenophylla]
                                                     [Ericameria viscidiflora]
                                     Chthonia
                                     Cichorium
                                             Cichorium endivia
                                             Cichorium intybus
                                                   [Cichorium intybus var. foliosum]
                                                   [Cichorium intybus var. sativum]
                                     Cineraria
                                             Cineraria multiflora
                                             Cineraria saxifraga
                                     Cirsium
                                             Cirsium X canalense
                                             Cirsium X crassum
                                             Cirsium X iowense
                                             Cirsium X vancouverense
                                             Cirsium acanthodontum
                                             Cirsium acaule
                                             Cirsium altissimum
                                                   [Carduus altissimus]
                                                   [Cirsium altissimum var. biltmoreanum]
                                             Cirsium amblylepis
                                             Cirsium andersonii
                                             Cirsium andrewsii
                                                   [Cnicus amplifolius]
                                             Cirsium araneans
                                             Cirsium arizonicum
                                               Cirsium arizonicum var. arizonicum
                                                     [Cirsium arizonicum var. nidulum]
                                                     [Cnicus arizonicus]
                                               Cirsium arizonicum var. bipinnatum
                                                     [Cirsium pulchellum ssp. bipinnatum]
                                                     [Cirsium pulchellum ssp. diffusum]
                                                     [Cirsium pulchellum var. glabrescens]
                                                     [Cnicus calcareus]
                                               Cirsium arizonicum var. chellyense
                                               Cirsium arizonicum var. rothrockii
                                               Cirsium arizonicum var. tenuisectum
                                             Cirsium arvense
                                                   [Breea arvensis]
                                                   [Breea incana]
                                                   [Carduus arvensis]
                                                   [Cirsium arvense var. argenteum]
                                                   [Cirsium arvense var. horridum]
                                                   [Cirsium arvense var. integrifolium]
                                                   [Cirsium arvense var. mite]
                                                   [Cirsium arvense var. vestitum]
                                                   [Cirsium incanum]
                                                   [Cirsium setosum]
                                                   [Serratula arvensis]
                                             Cirsium barnebyi
                                             Cirsium bipinnatum
                                             Cirsium botrys
                                             Cirsium brevifolium
                                                   [Cirsium palousense]
                                             Cirsium brevistylum
                                             Cirsium breweri
                                             Cirsium calcareum
                                               Cirsium calcareum var. bipinnatum
                                               Cirsium calcareum var. pulchellum
                                             Cirsium californicum
                                             Cirsium callilepis
                                             Cirsium campylon
                                             Cirsium candidissimum
                                             Cirsium canescens
                                                   [Carduus undulatus var. canescens]
                                                   [Cirsium nebraskense]
                                                   [Cirsium nelsonii]
                                                   [Cirsium plattense]
                                             Cirsium canovirens
                                             Cirsium canum
                                             Cirsium carolinianum
                                                   [Carduus carolinianus]
                                                   [Cirsium flaccidum]
                                             Cirsium centaureae
                                             Cirsium chellyense
                                             Cirsium chuskaense
                                             Cirsium ciliolatum
                                                   [Cirsium howellii]
                                             Cirsium clavatum
                                               Cirsium clavatum var. americanum
                                               Cirsium clavatum var. clavatum
                                               Cirsium clavatum var. osterhoutii
                                             Cirsium coulteri
                                             Cirsium crassicaule
                                             Cirsium cymosum
                                               Cirsium cymosum var. canovirens
                                               Cirsium cymosum var. cymosum
                                             Cirsium davisii
                                             Cirsium diffusum
                                             Cirsium discolor
                                                   [Carduus discolor]
                                             Cirsium douglasii
                                               Cirsium douglasii var. breweri
                                                     [Cirsium breweri var. lanosissimum]
                                                     [Cirsium douglasii var. canescens]
                                               Cirsium douglasii var. douglasii
                                                     [Cirsium breweri var. wrangelii]
                                             Cirsium drummondii
                                                   [Cirsium coccinatum]
                                             Cirsium eatonii
                                                   [Cirsium eriocephalum var. leiocephalum]
                                               Cirsium eatonii var. clokeyi
                                                     [Cirsium clokeyi]
                                               Cirsium eatonii var. eatonii
                                                     [Cirsium eatonii var. harrisonii]
                                               Cirsium eatonii var. eriocephalum
                                                     [Cirsium eriocephalum]
                                                     [Cirsium hookerianum var. eriocephalum]
                                                     [Cirsium scopulorum]
                                               Cirsium eatonii var. hesperium
                                                     [Cirsium hesperium]
                                               Cirsium eatonii var. murdockii
                                                     [Cirsium murdockii]
                                                     [Cirsium polyphyllum]
                                               Cirsium eatonii var. peckii
                                                     [Cirsium peckii]
                                               Cirsium eatonii var. viperinum
                                             Cirsium edule
                                               Cirsium edule var. edule
                                               Cirsium edule var. macounii
                                               Cirsium edule var. wenatchense
                                             Cirsium engelmannii
                                                   [Cirsium altissimum var. filipendulum]
                                                   [Cirsium filipendulum]
                                                   [Cirsium terraenigrae]
                                             Cirsium flodmanii
                                                   [Cirsium nebraskense var. discissum]
                                                   [Cirsium oblanceolatum]
                                             Cirsium foliosum
                                                   [Cirsium foliosum var. minganense]
                                             Cirsium fontinale
                                               Cirsium fontinale var. campylon
                                               Cirsium fontinale var. fontinale
                                               Cirsium fontinale var. obispoense
                                             Cirsium grahamii
                                             Cirsium griseum
                                             Cirsium hallii
                                             Cirsium helenioides
                                                   [Carduus helenioides]
                                                   [Carduus helenoides]
                                                   [Cirsium heterophyllum]
                                             Cirsium hesperium
                                             Cirsium hillii
                                             Cirsium hookerianum
                                             Cirsium horridulum
                                               Cirsium horridulum var. horridulum
                                                     [Cirsium horridulum var. elliottii]
                                               Cirsium horridulum var. megacanthum
                                               Cirsium horridulum var. vittatum
                                             Cirsium hydrophilum
                                               Cirsium hydrophilum var. hydrophilum
                                                     [Cirsium vaseyi var. hydrophilum]
                                               Cirsium hydrophilum var. vaseyi
                                                     [Cnicus breweri var. vaseyi]
                                             Cirsium inamoenum
                                                   [Carduus inamoenus]
                                                   [Cirsium wallowense]
                                               Cirsium inamoenum var. davisii
                                               Cirsium inamoenum var. inamoenum
                                             Cirsium japonicum
                                             Cirsium joanne
                                             Cirsium kamtschaticum
                                             Cirsium laterifolium
                                             Cirsium lecontei
                                                   [Carduus lecontei]
                                             Cirsium longistylum
                                             Cirsium macounii
                                             Cirsium mendocinum
                                             Cirsium mexicanum
                                             Cirsium modestum
                                             Cirsium mohavense
                                                   [Cirsium rusbyi]
                                                   [Cirsium virginense]
                                             Cirsium montigenum
                                             Cirsium muticum
                                                   [Carduus muticus]
                                                   [Cirsium bigelovii]
                                                   [Cirsium muticum var. monticola]
                                                   [Cirsium muticum var. subpinnatifidum]
                                             Cirsium navajoense
                                             Cirsium neomexicanum
                                                   [Carduus nevadensis]
                                                   [Cirsium arcuum]
                                                   [Cirsium humboldtense]
                                                   [Cirsium neomexicanum var. neomexicanum]
                                                   [Cirsium neomexicanum var. utahense]
                                                   [Cirsium utahense]
                                             Cirsium nidulum
                                             Cirsium nuttallii
                                                   [Carduus nuttallii]
                                             Cirsium occidentale
                                               Cirsium occidentale var. californicum
                                                     [Cirsium californicum ssp. pseudoreglense]
                                                     [Cirsium californicum var. bernardinum]
                                                     [Cirsium californicum var. californicum]
                                               Cirsium occidentale var. candidissimum
                                               Cirsium occidentale var. compactum
                                               Cirsium occidentale var. coulteri
                                               Cirsium occidentale var. lucianum
                                               Cirsium occidentale var. occidentale
                                               Cirsium occidentale var. venustum
                                             Cirsium ochrocentrum
                                               Cirsium ochrocentrum ssp. martinii
                                               Cirsium ochrocentrum ssp. ochrocentrum
                                                     [Cnicus ochrocentrus]
                                             Cirsium odoratum
                                             Cirsium oreganum
                                             Cirsium oreophilum
                                             Cirsium osterhoutii
                                             Cirsium ownbeyi
                                             Cirsium pallidum
                                             Cirsium palustre
                                             Cirsium parryi
                                                   [Cirsium gilense]
                                                   [Cirsium inornatum]
                                                   [Cirsium pallidum]
                                                   [Cirsium parryi ssp. mogollonicum]
                                                   [Cirsium parryi ssp. parryi]
                                                   [Cnicus parryi]
                                             Cirsium pastoris
                                             Cirsium perplexans
                                                   [Cirsium vernale]
                                             Cirsium pitcheri
                                             Cirsium praeteriens
                                             Cirsium proteanum
                                             Cirsium pulchellum
                                             Cirsium pulcherrimum
                                               Cirsium pulcherrimum var. aridum
                                                     [Cirsium aridum]
                                               Cirsium pulcherrimum var. pulcherrimum
                                             Cirsium pumilum
                                               Cirsium pumilum var. hillii
                                                     [Cirsium pumilum ssp. hillii]
                                               Cirsium pumilum var. pumilum
                                             Cirsium pyrenaicum
                                             Cirsium quercetorum
                                                   [Cirsium quercetorum var. mendocinum]
                                                   [Cirsium quercetorum var. quercetorum]
                                                   [Cirsium quercetorum var. walkerianum]
                                                   [Cirsium quercetorum var. xerolepis]
                                                   [Cirsium walkerianum]
                                             Cirsium remotifolium
                                                   [Cirsium stenolepidum]
                                               Cirsium remotifolium var. odontolepis
                                                     [Cirsium callilepis var. callilepis]
                                                     [Cirsium callilepis var. oregonense]
                                                     [Cirsium callilepis var. pseudocarlinoides]
                                                     [Cirsium remotifolium ssp. oregonense]
                                                     [Cirsium remotifolium ssp. pseudocarlinoides]
                                               Cirsium remotifolium var. remotifolium
                                                     [Cirsium remotifolium ssp. remotifolium]
                                               Cirsium remotifolium var. rivulare
                                             Cirsium repandum
                                                   [Carduus repandus]
                                             Cirsium rhothophilum
                                                   [Cirsium maritimum]
                                             Cirsium rothrockii
                                             Cirsium rydbergii
                                                   [Cirsium lactucinum]
                                             Cirsium scabrum
                                             Cirsium scapanolepis
                                             Cirsium scariosum
                                               Cirsium scariosum var. americanum
                                                     [Carduus americanus]
                                                     [Cirsium acaule var. americanum]
                                                     [Cirsium acaulescens]
                                                     [Cirsium americanum]
                                                     [Cirsium coloradense ssp. acaulescens]
                                                     [Cirsium coloradense ssp. longissimum]
                                                     [Cirsium drummondii ssp. lanatum]
                                                     [Cirsium drummondii ssp. latisquamum]
                                                     [Cirsium drummondii ssp. vexans]
                                                     [Cirsium drummondii var. acaulescens]
                                                     [Cirsium drummondii var. oregonense]
                                                     [Cirsium tioganum var. tioganum]
                                                     [Cirsium tioganum]
                                                     [Cnicus drummondii var. acaulescens]
                                                     [Cnicus tioganus]
                                               Cirsium scariosum var. citrinum
                                                     [Cirsium loncholepis]
                                                     [Cirsium quercetorum var. citrinum]
                                               Cirsium scariosum var. coloradense
                                                     [Carduus coloradensis]
                                                     [Cirsium X erosum]
                                                     [Cirsium coloradense]
                                                     [Cirsium erosum]
                                                     [Cirsium kelseyi]
                                                     [Cirsium olivescens]
                                                     [Cirsium tioganum var. coloradense]
                                               Cirsium scariosum var. congdonii
                                                     [Cirsium congdonii]
                                               Cirsium scariosum var. robustum
                                               Cirsium scariosum var. scariosum
                                                     [Cirsium butleri]
                                                     [Cirsium lacerum]
                                                     [Cirsium magnificum]
                                                     [Cirsium minganense]
                                               Cirsium scariosum var. thorneae
                                               Cirsium scariosum var. toiyabense
                                             Cirsium scopulorum
                                             Cirsium smallii
                                             Cirsium spathulifolium
                                             Cirsium spinosissimum
                                             Cirsium subniveum
                                             Cirsium texanum
                                                   [Carduus austrinus]
                                                   [Carduus helleri]
                                                   [Cirsium helleri]
                                                   [Cirsium ochrocentrum var. helleri]
                                                   [Cirsium texanum var. stenolepis]
                                             Cirsium tracyi
                                                   [Carduus tracyi]
                                                   [Cirsium acuatum]
                                                   [Cirsium floccosum]
                                                   [Cirsium undulatum var. tracyi]
                                             Cirsium triacanthum
                                             Cirsium turneri
                                             Cirsium tweedyi
                                             Cirsium undulatum
                                               Cirsium undulatum var. undulatum
                                                     [Carduus undulatus]
                                                     [Cirsium megacephalum]
                                                     [Cirsium undulatum var. megacephalum]
                                                     [Cnicus undulatus var. megacephalus]
                                             Cirsium validus
                                             Cirsium vaseyi
                                             Cirsium vinaceum
                                             Cirsium virginianum
                                                   [Carduus virginianus]
                                                   [Cirsium revolutum]
                                             Cirsium vittatum
                                             Cirsium vulgare
                                                   [Carduus lanceolatus]
                                                   [Carduus vulgaris]
                                                   [Cirsium lanceolatum var. hypoleucum]
                                                   [Cirsium lanceolatum]
                                             Cirsium wheeleri
                                                   [Cirsium blumeri]
                                                   [Cirsium perennans]
                                                   [Cnicus wheeleri]
                                             Cirsium wrightii
                                     Cladanthus
                                             Cladanthus mixtus
                                                   [Chamaemelum mixtum]
                                                   [Ormenis mixta]
                                     Clappia
                                             Clappia suaedifolia
                                     Clibadium
                                             Clibadium erosum
                                                   [Trixis erosa]
                                                   [Trixis erosum]
                                             Clibadium surinamense
                                             Clibadium sylvestre
                                                   [Baillieria sylvestris]
                                                   [Clibadium badieri]
                                                   [Clibadium terebinthinaceum var. badieri]
                                                   [Clibadium vargasii]
                                             Clibadium terebinthinaceum
                                     Coleosanthus
                                     Columbiadoria
                                             Columbiadoria hallii
                                                   [Haplopappus hallii]
                                                   [Hesperodoria hallii]
                                     Condylidium
                                             Condylidium iresinoides
                                                   [Eupatorium iresinoides var. integrum]
                                     Conoclinium
                                             Conoclinium betonicifolium
                                               Conoclinium betonicifolium var. betonicifolium
                                               Conoclinium betonicifolium var. integrifolium
                                             Conoclinium coelestinum
                                                   [Conoclinium colelestinum]
                                             Conoclinium dissectum
                                                   [Conoclinium greggii]
                                     Constancea
                                             Constancea nevinii
                                                   [Eriophyllum nevinii]
                                     Conyza
                                             Conyza asteroides
                                             Conyza bifoliata
                                             Conyza bonariensis
                                                   [Conyza bonariensis var. bonariensis]
                                                   [Erigeron bonariensis]
                                                   [Erigeron crispus]
                                                   [Erigeron linifolius]
                                                   [Leptilon bonariense]
                                                   [Leptilon linifolium]
                                             Conyza canadensis
                                                   [Conyza canadensis var. canadensis]
                                                   [Conyza canadensis var. glabrata]
                                                   [Conyza canadensis var. pusilla]
                                                   [Conyza parva]
                                                   [Erigeron canadensis var. glabratus]
                                                   [Erigeron canadensis var. pusillus]
                                                   [Erigeron canadensis]
                                                   [Erigeron pusillus]
                                                   [Leptilon canadense]
                                                   [Leptilon pusillum]
                                             Conyza carolinensis
                                             Conyza cinerea
                                             Conyza cortesii
                                             Conyza coulteri
                                               Conyza coulteri var. tenuisecta
                                               Conyza coulteri var. virgata
                                             Conyza eriophylla
                                             Conyza filaginoides
                                             Conyza floribunda
                                                   [Conyza bilboana]
                                                   [Conyza bonariensis var. leiotheca]
                                                   [Erigeron bilboanus]
                                                   [Erigeron floribundus]
                                             Conyza laevigata
                                                   [Conyza apurensis]
                                                   [Conyza subspathulata]
                                                   [Erigeron apurensis]
                                                   [Erigeron chinensis]
                                                   [Erigeron laevigatus]
                                                   [Erigeron spathulatus]
                                                   [Leptilon chinense]
                                             Conyza linifolia
                                             Conyza lobata
                                             Conyza lyrata
                                             Conyza odorata
                                             Conyza primulifolia
                                                   [Conyza chilensis]
                                             Conyza ramosissima
                                                   [Erigeron divaricatus]
                                                   [Leptilon divaricatum]
                                             Conyza salicifolia
                                             Conyza schiedeana
                                             Conyza sophiifolia
                                             Conyza symphytifolia
                                             Conyza viscosa
                                     Coreocarpus
                                             Coreocarpus arizonicus
                                     Coreopsis
                                             Coreopsis auriculata
                                             Coreopsis basalis
                                                   [Calliopsis basalis]
                                                   [Coreopsis basalis var. wrightii]
                                                   [Coreopsis drummondii var. wrightii]
                                                   [Coreopsis drummondii]
                                                   [Coreopsis wrightii]
                                             Coreopsis bigelovii
                                                   [Leptosyne bigelovii]
                                                   [Pugiopappus bigelovii]
                                             Coreopsis californica
                                                   [Coreopsis californica var. newberryi]
                                                   [Coreopsis newberryi]
                                               Coreopsis californica var. californica
                                                     [Leptosyne californica]
                                             Coreopsis calliopsidea
                                                   [Agarista calliopsidea]
                                             Coreopsis delphiniifolia
                                                   [Coreopsis delphiniifolia var. chlooidea]
                                                   [Coreopsis major var. linearis]
                                             Coreopsis douglasii
                                                   [Coreopsis stillmanii var. jonesii]
                                                   [Leptosyne douglasii]
                                             Coreopsis gigantea
                                                   [Leptosyne gigantea]
                                                   [Tuckermannia gigantea]
                                             Coreopsis gladiata
                                                   [Coreopsis angustifolia]
                                                   [Coreopsis falcata]
                                                   [Coreopsis floridana]
                                                   [Coreopsis gladiata var. linifolia]
                                                   [Coreopsis helianthoides]
                                                   [Coreopsis linifolia]
                                                   [Coreopsis longifolia var. godfreyi]
                                                   [Coreopsis longifolia]
                                                   [Coreopsis oniscicarpa var. simulans]
                                                   [Coreopsis oniscicarpa]
                                                   [Coreopsis saxicoloidea]
                                             Coreopsis grandiflora
                                                   [Coreopsis grandiflora var. grandiflora]
                                                   [Coreopsis grandiflora var. harveyana]
                                                   [Coreopsis grandiflora var. inclinata]
                                                   [Coreopsis grandiflora var. longipes]
                                                   [Coreopsis grandiflora var. pilosa]
                                                   [Coreopsis grandiflora var. saxicola]
                                                   [Coreopsis heterolepis]
                                                   [Coreopsis longipes]
                                                   [Coreopsis saxicola var. duncanii]
                                                   [Coreopsis saxicola]
                                             Coreopsis hamiltonii
                                                   [Leptosyne hamiltonii]
                                             Coreopsis integrifolia
                                             Coreopsis intermedia
                                             Coreopsis lanceolata
                                                   [Coreopsis crassifolia]
                                                   [Coreopsis heterogyna]
                                                   [Coreopsis lanceolata var. villosa]
                                             Coreopsis latifolia
                                                   [Leiodon latifolius]
                                             Coreopsis leavenworthii
                                                   [Coreopsis angustata]
                                                   [Coreopsis leavenworthii var. curtissii]
                                                   [Coreopsis leavenworthii var. garberi]
                                                   [Coreopsis leavenworthii var. lewtonii]
                                                   [Coreopsis lewtonii]
                                             Coreopsis major
                                                   [Coreopsis major var. oemleri]
                                                   [Coreopsis major var. rigida]
                                                   [Coreopsis major var. stellata]
                                             Coreopsis maritima
                                                   [Tuckermannia maritima]
                                             Coreopsis nudata
                                             Coreopsis nuecensis
                                             Coreopsis nuecensoides
                                             Coreopsis palmata
                                             Coreopsis pubescens
                                                   [Coreopsis corninsularis]
                                                   [Coreopsis debilis]
                                                   [Coreopsis pubescens var. debilis]
                                                   [Coreopsis pubescens var. pubescens]
                                                   [Coreopsis pubescens var. robusta]
                                             Coreopsis pulchra
                                             Coreopsis reptans
                                             Coreopsis rosea
                                             Coreopsis stillmanii
                                                   [Leptosyne stillmanii]
                                             Coreopsis tinctoria
                                                   [Coreopsis atkinsoniana]
                                                   [Coreopsis cardaminefolia]
                                                   [Coreopsis similis]
                                                   [Coreopsis stenophylla]
                                                   [Coreopsis tinctoria var. atkinsoniana]
                                                   [Coreopsis tinctoria var. imminuta]
                                                   [Coreopsis tinctoria var. similis]
                                                   [Coreopsis tinctoria var. tinctoria]
                                             Coreopsis tripteris
                                                   [Coreopsis tripteris var. deamii]
                                                   [Coreopsis tripteris var. intercedens]
                                                   [Coreopsis tripteris var. smithii]
                                                   [Coreopsis tripteris var. subrhomboidea]
                                             Coreopsis verticillata
                                     Corethrogyne
                                             Corethrogyne filaginifolia
                                                   [Corethrogyne californica var. californica]
                                                   [Corethrogyne californica var. lyonii]
                                                   [Corethrogyne californica var. obovata]
                                                   [Corethrogyne californica]
                                                   [Corethrogyne filaginifolia var. bernardina]
                                                   [Corethrogyne filaginifolia var. brevicula]
                                                   [Corethrogyne filaginifolia var. californica]
                                                   [Corethrogyne filaginifolia var. filaginifolia]
                                                   [Corethrogyne filaginifolia var. glomerata]
                                                   [Corethrogyne filaginifolia var. hamiltonensis]
                                                   [Corethrogyne filaginifolia var. incana]
                                                   [Corethrogyne filaginifolia var. latifolia]
                                                   [Corethrogyne filaginifolia var. linifolia]
                                                   [Corethrogyne filaginifolia var. peirsonii]
                                                   [Corethrogyne filaginifolia var. pinetorum]
                                                   [Corethrogyne filaginifolia var. rigida]
                                                   [Corethrogyne filaginifolia var. robusta]
                                                   [Corethrogyne filaginifolia var. sessilis]
                                                   [Corethrogyne filaginifolia var. virgata]
                                                   [Corethrogyne filaginifolia var. viscidula]
                                                   [Corethrogyne flagellaris]
                                                   [Corethrogyne floccosa]
                                                   [Corethrogyne incana]
                                                   [Corethrogyne leucophylla]
                                                   [Corethrogyne linifolia]
                                                   [Corethrogyne obovata]
                                                   [Corethrogyne scabra]
                                                   [Corethrogyne sessilis]
                                                   [Corethrogyne tomentella]
                                                   [Corethrogyne viscidula]
                                                   [Lessingia filaginifolia var. californica]
                                                   [Lessingia filaginifolia var. filaginifolia]
                                                   [Lessingia filaginifolia]
                                     Cosmos
                                             Cosmos bipinnatus
                                             Cosmos caudatus
                                                   [Bidens caudatus]
                                             Cosmos parviflorus
                                                   [Coreopsis parviflora]
                                             Cosmos sulphureus
                                     Cota
                                             Cota tinctoria
                                     Cotula
                                             Cotula australis
                                             Cotula coronopifolia
                                             Cotula mexicana
                                     Crassina
                                     Crassocephalum
                                             Crassocephalum crepidioides
                                             Crassocephalum vitellinum
                                     Crepis
                                             Crepis acuminata
                                                   [Crepis acuminata ssp. acuminata]
                                                   [Crepis acuminata ssp. pluriflora]
                                                   [Crepis acuminata ssp. typica]
                                                   [Psilochenia acuminata ssp. pluriflora]
                                                   [Psilochenia acuminata]
                                             Crepis alpicola
                                             Crepis atribarba
                                                   [Crepis atribarba ssp. atribarba]
                                                   [Crepis atribarba ssp. cytotaxonomicorum]
                                                   [Crepis atribarba ssp. originalis]
                                                   [Crepis atribarba ssp. typicus]
                                                   [Crepis atribarba var. cytotaxonomicorum]
                                                   [Psilochenia atribarba]
                                             Crepis bakeri
                                               Crepis bakeri ssp. bakeri
                                               Crepis bakeri ssp. cusickii
                                                     [Psilochenia bakeri ssp. cusickii]
                                               Crepis bakeri ssp. idahoensis
                                                     [Psilochenia bakeri ssp. idahoensis]
                                             Crepis barbata
                                             Crepis barberi
                                             Crepis barbigera
                                                   [Crepis baruigera]
                                             Crepis biennis
                                             Crepis bulbosa
                                             Crepis bursifolia
                                             Crepis capillaris
                                             Crepis elegans
                                                   [Askellia elegans]
                                             Crepis foetida
                                                   [Crepis foetida var. foetida]
                                                   [Crepis foetida var. rhoeadifolia]
                                             Crepis glauca
                                             Crepis glaucella
                                             Crepis intermedia
                                                   [Psilochenia intermedia]
                                             Crepis japonica
                                             Crepis kotschyana
                                             Crepis modocensis
                                               Crepis modocensis ssp. glareosa
                                                     [Crepis modocensis ssp. glabraeosa]
                                               Crepis modocensis ssp. modocensis
                                                     [Crepis modocensis ssp. typica]
                                               Crepis modocensis ssp. rostrata
                                                     [Crepis modocensis var. rostrata]
                                               Crepis modocensis ssp. subacaulis
                                             Crepis monticola
                                                   [Psilochenia monticola]
                                             Crepis nana
                                                   [Askellia nana ssp. ramosa]
                                                   [Askellia nana]
                                                   [Crepis nana ssp. clivicola]
                                                   [Crepis nana ssp. nana]
                                                   [Crepis nana ssp. ramosa]
                                                   [Crepis nana ssp. typica]
                                                   [Crepis nana var. lyratifolia]
                                                   [Crepis nana var. ramosa]
                                             Crepis neomexicana
                                             Crepis nicaeensis
                                             Crepis occidentalis
                                               Crepis occidentalis ssp. conjuncta
                                               Crepis occidentalis ssp. costata
                                                     [Crepis occidentalis var. costata]
                                               Crepis occidentalis ssp. occidentalis
                                                     [Crepis occidentalis ssp. typica]
                                               Crepis occidentalis ssp. pumila
                                                     [Crepis occidentalis var. pumila]
                                             Crepis paludosa
                                             Crepis pannonica
                                                   [Crepis rigida]
                                             Crepis perplexans
                                             Crepis platyphylla
                                             Crepis pleurocarpa
                                                   [Psilochenia pleurocarpa]
                                             Crepis pulchra
                                             Crepis riparia
                                             Crepis rubra
                                             Crepis runcinata
                                               Crepis runcinata ssp. andersonii
                                                     [Crepis runcinata var. andersonii]
                                               Crepis runcinata ssp. barberi
                                                     [Crepis glauca ssp. barberi]
                                                     [Crepis runcinata var. barberi]
                                               Crepis runcinata ssp. glauca
                                                     [Crepis runcinata var. glauca]
                                               Crepis runcinata ssp. hallii
                                               Crepis runcinata ssp. hispidulosa
                                                     [Crepis runcinata var. hispidulosa]
                                               Crepis runcinata ssp. imbricata
                                                     [Crepis runcinata var. imbricata]
                                               Crepis runcinata ssp. runcinata
                                                     [Crepis runcinata ssp. typica]
                                             Crepis setosa
                                             Crepis tectorum
                                             Crepis vesicaria
                                                   [Crepis vesicaria ssp. haenseleri]
                                                   [Crepis vesicaria ssp. taraxacifolia]
                                                   [Crepis vesicaria ssp. vesicaria]
                                                   [Crepis vesicaria var. taraxacifolia]
                                                   [Crepis vesicaria var. taraxicifolia]
                                                   [Crepis vesicaria var. vesicaris]
                                             Crepis zacintha
                                     Critonia
                                             Critonia macropoda
                                                   [Critonia dominicensis]
                                             Critonia portoricensis
                                     Crocidium
                                             Crocidium multicaule
                                     Crockeria
                                     Croptilon
                                             Croptilon divaricatum
                                                   [Haplopappus divaricatus]
                                                   [Inula divaricata]
                                                   [Isopappus divaricatus]
                                             Croptilon hookerianum
                                               Croptilon hookerianum var. graniticum
                                                     [Croptilon divaricatum var. graniticum]
                                                     [Haplopappus validus ssp. graniticus]
                                               Croptilon hookerianum var. hookerianum
                                                     [Croptilon divaricatum var. hookerianum]
                                                     [Haplopappus divaricatus var. hookerianus]
                                                     [Haplopappus validus ssp. torreyi]
                                               Croptilon hookerianum var. validum
                                             Croptilon rigidifolium
                                                   [Croptilon divaricatum var. hirtellum]
                                                   [Haplopappus rigidifolius]
                                     Crupina
                                             Crupina vulgaris
                                               Crupina vulgaris var. brachypappa
                                               Crupina vulgaris var. vulgaris
                                     Cuniculotinus
                                             Cuniculotinus gramineus
                                     Cupularia
                                     Curio
                                             Curio talinoides
                                               Curio talinoides var. mandraliscae
                                     Cyanthillium
                                             Cyanthillium cinereum
                                                   [Senecioides cinerea]
                                                   [Vernonia cinerea var. parviflora]
                                     Cyclachaena
                                             Cyclachaena xanthifolia
                                             Cyclachaena xanthiifolia
                                                   [Cyclachaena xanthifolia]
                                                   [Iva xanthifolia]
                                                   [Iva xanthiifolia]
                                     Cymbia
                                     Cymophora
                                             Cymophora accedens
                                                   [Tridax accedens]
                                     Cynara
                                             Cynara cardunculus
                                               Cynara cardunculus ssp. cardunculus
                                               Cynara cardunculus ssp. flavescens
                                             Cynara scolymus
                                     Cynthia
                                     Dahlia
                                             Dahlia coccinea
                                             Dahlia pinnata
                                                   [Dahlia rosea]
                                     Deinandra
                                             Deinandra arida
                                                   [Hemizonia arida]
                                             Deinandra bacigalupii
                                             Deinandra clementina
                                                   [Hemizonia clementina]
                                             Deinandra conjugens
                                                   [Hemizonia conjugens]
                                             Deinandra corymbosa
                                                   [Deinandra corymbosa ssp. corymbosa]
                                                   [Deinandra corymbosa ssp. macrocephala]
                                                   [Hemizonia corymbosa ssp. corymbosa]
                                                   [Hemizonia corymbosa ssp. macrocephala]
                                                   [Hemizonia corymbosa]
                                             Deinandra fasciculata
                                                   [Hemizonia fasciculata]
                                                   [Hemizonia ramosissima]
                                             Deinandra floribunda
                                                   [Hemizonia floribunda]
                                             Deinandra halliana
                                                   [Hemizonia halliana]
                                             Deinandra increscens
                                               Deinandra increscens ssp. increscens
                                                     [Hemizonia increscens ssp. increscens]
                                                     [Hemizonia paniculata ssp. increscens]
                                               Deinandra increscens ssp. villosa
                                                     [Hemizonia increscens ssp. villosa]
                                             Deinandra kelloggii
                                                   [Hemizonia kelloggii]
                                             Deinandra lobbii
                                                   [Hemizonia lobbii]
                                             Deinandra minthornii
                                                   [Hemizonia minthornii]
                                             Deinandra mohavensis
                                                   [Hemizonia mohavensis]
                                             Deinandra pallida
                                                   [Hemizonia pallida]
                                             Deinandra paniculata
                                                   [Deinandra increscens ssp. foliosa]
                                                   [Hemizonia increscens ssp. foliosa]
                                                   [Hemizonia paniculata var. paniculata]
                                                   [Hemizonia paniculata]
                                             Deinandra pentactis
                                                   [Hemizonia pentactis]
                                     Delairea
                                             Delairea odorata
                                     Delwiensia
                                             Delwiensia pattersonii
                                     Dendranthema
                                             Dendranthema hultenii
                                             Dendranthema indicum
                                     Dendrophorbium
                                             Dendrophorbium lucidum
                                                   [Cineraria lucida]
                                     Diaperia
                                             Diaperia candida
                                                   [Calymmandra candida]
                                                   [Filago candida]
                                             Diaperia drummondii
                                             Diaperia prolifera
                                                   [Filago nuttallii]
                                                   [Filago prolifera]
                                               Diaperia prolifera var. barnebyi
                                               Diaperia prolifera var. prolifera
                                             Diaperia verna
                                                   [Diaperia multicaulis]
                                                   [Evax verna var. verna]
                                                   [Filaginopsis multicaulis]
                                                   [Filago nivea]
                                                   [Filago verna]
                                               Diaperia verna var. drummondii
                                                     [Filago verna var. drummondii]
                                               Diaperia verna var. verna
                                     Dichaetophora
                                             Dichaetophora campestris
                                     Dicoria
                                             Dicoria brandegei
                                             Dicoria canescens
                                                   [Dicoria brandegeei]
                                                   [Dicoria canescens ssp. brandegeei]
                                                   [Dicoria canescens ssp. canescens]
                                                   [Dicoria canescens ssp. clarkiae]
                                                   [Dicoria canescens ssp. hispidula]
                                                   [Dicoria canescens ssp. wetherillii]
                                                   [Dicoria canescens var. brandegeei]
                                                   [Dicoria canescens var. hispidula]
                                                   [Dicoria canescens var. wetherillii]
                                                   [Dicoria clarkiae]
                                                   [Dicoria oblongifolia]
                                                   [Dicoria paniculata]
                                                   [Dicoria wetherillii]
                                     Dicranocarpus
                                             Dicranocarpus parviflorus
                                     Dieteria
                                             Dieteria asteroides
                                                   [Aster canescens var. latifolius]
                                                   [Machaeranthera asteroides var. asteroides]
                                               Dieteria asteroides var. asteroides
                                               Dieteria asteroides var. glandulosa
                                               Dieteria asteroides var. lagunensis
                                             Dieteria bigelovii
                                               Dieteria bigelovii var. bigelovii
                                               Dieteria bigelovii var. commixta
                                               Dieteria bigelovii var. mucronata
                                             Dieteria canescens
                                               Dieteria canescens var. ambigua
                                               Dieteria canescens var. aristata
                                               Dieteria canescens var. canescens
                                               Dieteria canescens var. glabra
                                               Dieteria canescens var. incana
                                               Dieteria canescens var. leucanthemifolia
                                               Dieteria canescens var. nebraskana
                                               Dieteria canescens var. sessiliflora
                                               Dieteria canescens var. shastensis
                                               Dieteria canescens var. ziegleri
                                             Dieteria divaricata
                                             Dieteria incana
                                             Dieteria pulverulenta
                                             Dieteria sessiliflora
                                             Dieteria viscosa
                                     Dimeresia
                                           [Dimersia]
                                             Dimeresia howellii
                                                   [Dimersia howelli]
                                     Dimorphotheca
                                             Dimorphotheca pluvialis
                                                   [Dimorphotheca annua]
                                             Dimorphotheca sinuata
                                             Dimorphotheca tragus
                                                   [Castalis tragus]
                                                   [Dimorphotheca aurantiaca]
                                     Diplactis
                                     Diplopappus
                                             Diplopappus incanus
                                     Diplostelma
                                     Distasis
                                     Dittrichia
                                             Dittrichia graveolens
                                                   [Inula graveolens]
                                             Dittrichia viscosa
                                                   [Cupularia viscosa]
                                                   [Inula viscosa]
                                     Doellingeria
                                             Doellingeria infirma
                                                   [Doellingeria humilis]
                                             Doellingeria scabra
                                             Doellingeria sericocarpoides
                                                   [Aster umbellatus var. brevisquamis]
                                                   [Aster umbellatus var. latifolius]
                                                   [Doellingeria umbellata var. latifolia]
                                             Doellingeria umbellata
                                               Doellingeria umbellata var. pubens
                                                     [Doellingeria umbellata ssp. pubens]
                                               Doellingeria umbellata var. umbellata
                                     Doronicum
                                             Doronicum austriacum
                                             Doronicum orientale
                                                   [Doronicum caucasicum]
                                             Doronicum pardalianches
                                                   [Doronicum cordatum]
                                                   [Doronicum paralianches]
                                             Doronicum plantagineum
                                     Dubautia
                                           [Railliautia]
                                             Dubautia X demissifolia
                                                   [Dubautia montana var. robustior]
                                                   [Railliardia demissifolia]
                                                   [Railliardia montana var. robustior]
                                             Dubautia X fallax
                                                   [Dubautia X fucosa]
                                                   [Dubautia kohalae]
                                                   [Dubautia lonchophylla]
                                                   [Railliardia kohalae]
                                                   [Railliautia X fallax]
                                                   [Railliautia X fucosa]
                                             Dubautia X media
                                                   [Dubautia X mendax]
                                             Dubautia X molokaiensis
                                                   [Dubautia molokaiensis var. oppositifolia]
                                                   [Railliardia molokaiensis var. oppositifolia]
                                                   [Railliardia molokaiensis]
                                             Dubautia X montana
                                                   [Railliardia montana]
                                             Dubautia X thyrsiflora
                                                   [Dubautia coriacea]
                                                   [Dubautia ternifolia]
                                                   [Dubautia thyrsiflora var. cernua]
                                                   [Railliardia demissifolia var. dolichophylla]
                                                   [Railliardia ternifolia]
                                                   [Railliardia thyrsiflora var. cernua]
                                                   [Railliardia thyrsiflora]
                                             Dubautia X vafra
                                             Dubautia arborea
                                                   [Railliardia arborea]
                                             Dubautia ciliolata
                                               Dubautia ciliolata ssp. ciliolata
                                                     [Dubautia ciliolata var. juniperoides]
                                                     [Railliardia ciliolata var. juniperoides]
                                               Dubautia ciliolata ssp. glutinosa
                                             Dubautia herbstobatae
                                                   [Railliardia herbstobatae]
                                             Dubautia hillebrandii
                                             Dubautia imbricata
                                               Dubautia imbricata ssp. acronaea
                                               Dubautia imbricata ssp. imbricata
                                             Dubautia kalalauensis
                                             Dubautia kenwoodii
                                             Dubautia knudsenii
                                               Dubautia knudsenii ssp. filiformis
                                               Dubautia knudsenii ssp. knudsenii
                                               Dubautia knudsenii ssp. nagatae
                                             Dubautia laevigata
                                                   [Dubautia X mendacoides]
                                                   [Dubautia laevigata var. parvifolia]
                                             Dubautia latifolia
                                                   [Railliardia latifolia var. helleri]
                                                   [Railliardia latifolia]
                                             Dubautia laxa
                                               Dubautia laxa ssp. bryanii
                                                     [Dubautia laxa var. bryanii]
                                               Dubautia laxa ssp. hirsuta
                                                     [Dubautia laxa var. hirsuta]
                                                     [Dubautia laxa var. intercedens]
                                                     [Dubautia laxa var. pedicellata]
                                                     [Dubautia laxa var. skottsbergii]
                                                     [Dubautia laxa var. waianensis]
                                               Dubautia laxa ssp. laxa
                                                     [Dubautia knudsenii var. degeneri]
                                                     [Dubautia laxa var. greenwelliae]
                                                     [Dubautia laxa var. hispida]
                                                     [Dubautia laxa var. obovata]
                                               Dubautia laxa ssp. pseudoplantaginea
                                                     [Dubautia laxa var. pseudoplantaginea]
                                             Dubautia linearis
                                               Dubautia linearis ssp. hillebrandii
                                                     [Railliardia ciliolata var. leptocephala]
                                               Dubautia linearis ssp. linearis
                                               Dubautia linearis ssp. opposita
                                                     [Dubautia linearis var. opposita]
                                                     [Railliardia linearis var. opposita]
                                             Dubautia magnifolia
                                             Dubautia menziesii
                                                   [Dubautia ciliolata var. trinervia]
                                                   [Dubautia menziesii var. angustifolia]
                                                   [Dubautia rockii]
                                                   [Dubautia struthioloides]
                                                   [Railliardia ciliolata var. trinervia]
                                                   [Railliardia menziesii var. angustifolia]
                                                   [Railliardia menziesii]
                                                   [Railliardia rockii]
                                                   [Railliardia struthioloides]
                                             Dubautia microcephala
                                             Dubautia molokaiensis
                                             Dubautia montana
                                             Dubautia nagatae
                                             Dubautia paleata
                                                   [Dubautia X paludicola]
                                             Dubautia pauciflorula
                                             Dubautia plantaginea
                                               Dubautia plantaginea ssp. humilis
                                               Dubautia plantaginea ssp. magnifolia
                                               Dubautia plantaginea ssp. plantaginea
                                                     [Dubautia plantaginea var. acridentata]
                                                     [Dubautia plantaginea var. glandulosa]
                                                     [Dubautia plantaginea var. pauoaensis]
                                                     [Dubautia plantaginea var. platyphylla]
                                                     [Dubautia plantaginea var. strigosa]
                                             Dubautia platyphylla
                                                   [Dubautia platyphylla var. leptophylla]
                                                   [Railliardia platyphylla var. leptophylla]
                                                   [Railliardia platyphylla var. trillioidea]
                                                   [Railliardia platyphylla]
                                             Dubautia raillardioides
                                             Dubautia reticulata
                                                   [Dubautia montana var. longifolia]
                                                   [Railliardia montana var. longifolia]
                                                   [Railliardia reticulata]
                                             Dubautia scabra
                                               Dubautia scabra ssp. leiophylla
                                                     [Dubautia molokaiensis var. stipitata]
                                                     [Dubautia scabra var. leiophylla]
                                                     [Dubautia scabra var. munroi]
                                                     [Railliardia lonchophylla var. stipitata]
                                                     [Railliardia molokaiensis var. stipitata]
                                                     [Railliardia scabra var. leiophylla]
                                                     [Railliardia scabra var. munroi]
                                               Dubautia scabra ssp. scabra
                                             Dubautia sherffiana
                                                   [Dubautia sherffiana var. paucinervia]
                                                   [Railliardia sherffiana var. paucinervia]
                                                   [Railliardia sherffiana]
                                             Dubautia syndetica
                                             Dubautia thyrsiflora
                                             Dubautia waialealae
                                             Dubautia waianapanapaenis
                                                   [Dubautia dolosa]
                                                   [Railliardia X dolosa]
                                                   [Railliardia waianapanapaenis]
                                     Dugaldia
                                             Dugaldia hoopesii
                                     Dysodiopsis
                                             Dysodiopsis tagetoides
                                                   [Hymenatherum tagetoides]
                                     Dysodium
                                     Dyssodia
                                             Dyssodia aurea
                                             Dyssodia belenidium
                                             Dyssodia cooperi
                                             Dyssodia hartwegii
                                             Dyssodia neomexicana
                                             Dyssodia papposa
                                                   [Boebera papposa]
                                                   [Tagetes papposa]
                                             Dyssodia pentachaeta
                                             Dyssodia porophylla
                                             Dyssodia porophylloides
                                             Dyssodia setifolia
                                             Dyssodia tagetoides
                                             Dyssodia tenuiloba
                                             Dyssodia texana
                                             Dyssodia thurberi
                                             Dyssodia treculii
                                             Dyssodia wrightii
                                     Eastwoodia
                                             Eastwoodia elegans
                                     Eatonella
                                             Eatonella nivea
                                     Echinacea
                                             Echinacea angustifolia
                                                   [Brauneria angustifolia]
                                                   [Echinacea angustifolia var. angustifolia]
                                                   [Echinacea angustifolia var. strigosa]
                                                   [Echinacea pallida var. angustifolia]
                                                   [Echinacea pallida var. strigosa]
                                             Echinacea atrorubens
                                             Echinacea laevigata
                                                   [Echinacea purpurea var. laevigata]
                                             Echinacea pallida
                                                   [Brauneria pallida]
                                                   [Rudbeckia pallida]
                                             Echinacea paradoxa
                                               Echinacea paradoxa var. neglecta
                                               Echinacea paradoxa var. paradoxa
                                                     [Echinacea atrorubens var. paradoxa]
                                             Echinacea purpurea
                                                   [Brauneria purpurea]
                                                   [Echinacea purpurea var. arkansana]
                                                   [Rudbeckia purpurea]
                                             Echinacea sanguinea
                                                   [Echinacea pallida var. sanguinea]
                                             Echinacea simulata
                                             Echinacea tennesseensis
                                                   [Echinacea angustifolia var. tennesseensis]
                                     Echinops
                                             Echinops bannaticus
                                             Echinops exaltatus
                                                   [Echinops commutatus]
                                             Echinops fruticosa
                                             Echinops fruticosus
                                             Echinops ritro
                                                   [Echinops rito]
                                               Echinops ritro ssp. ritro
                                                     [Echinops rito ssp. rito]
                                                     [Echinops ritro var. ritro]
                                               Echinops ritro ssp. ruthenicus
                                                     [Echinops rito ssp. ruthenicus]
                                                     [Echinops ritro var. ruthenicus]
                                             Echinops ruthenicus
                                             Echinops sphaerocephalus
                                     Eclipta
                                             Eclipta prostrata
                                                   [Eclipta alba]
                                                   [Eclipta erecta]
                                                   [Eclipta punctata]
                                                   [Verbesina alba]
                                                   [Verbesina prostrata]
                                     Egletes
                                             Egletes prostrata
                                             Egletes viscosa
                                                   [Cotula viscosa]
                                     Elephantopus
                                           [Orthopappus]
                                             Elephantopus angustifolius
                                                   [Orthopappus angustifolius]
                                             Elephantopus carolinianus
                                                   [Elephantopus flexuosus]
                                                   [Elephantopus violaceus]
                                             Elephantopus elatus
                                                   [Elephantopus elatus var. intermedius]
                                             Elephantopus mollis
                                                   [Elephantopus hypomalacus]
                                                   [Elephantopus martii]
                                                   [Elephantopus mollis var. bracteosus]
                                                   [Elephantopus mollis var. capitulatus]
                                                   [Elephantopus pilosus]
                                             Elephantopus nudatus
                                             Elephantopus scaber
                                             Elephantopus tomentosus
                                                   [Elephantopus carolinianus var. simplex]
                                                   [Elephantopus nudicaulis]
                                     Eleutheranthera
                                             Eleutheranthera ruderalis
                                     Emilia
                                             Emilia coccinea
                                                   [Cacalia coccinea]
                                             Emilia fosbergii
                                             Emilia sonchifolia
                                                   [Cacalia sonchifolia]
                                                   [Emilia javanica]
                                                   [Emilia sonchifolia var. javanica]
                                                   [Emilia sonchifolia var. sonchifolia]
                                     Encelia
                                             Encelia actonii
                                                   [Encelia frutescens var. actonii]
                                                   [Encelia virginensis ssp. actonii]
                                                   [Encelia virginensis var. actonii]
                                             Encelia californica
                                             Encelia farinosa
                                                   [Encelia farinosa var. farinosa]
                                                   [Encelia farinosa var. phenicodonta]
                                                   [Encelia farinosa var. radians]
                                             Encelia frutescens
                                                   [Encelia frutescens var. frutescens]
                                                   [Simsia frutescens]
                                             Encelia nutans
                                             Encelia resinifera
                                                   [Encelia frutescens var. resinosa]
                                                   [Encelia resinifera ssp. resinifera]
                                                   [Encelia resinifera ssp. tenuifolia]
                                             Encelia scaposa
                                                   [Encelia scaposa var. stenophylla]
                                                   [Simsia scaposa]
                                             Encelia virginensis
                                                   [Encelia frutescens var. virginensis]
                                                   [Encelia virginensis var. virginensis]
                                     Enceliopsis
                                             Enceliopsis argophylla
                                                   [Tithonia argophylla]
                                             Enceliopsis covillei
                                                   [Enceliopsis argophylla var. grandiflora]
                                                   [Helianthella covillei]
                                             Enceliopsis nudicaulis
                                                   [Encelia nudicaulis]
                                                   [Enceliopsis nudicaulis var. corrugata]
                                                   [Enceliopsis nudicaulis var. nudicaulis]
                                             Enceliopsis nutans
                                     Endorima
                                     Engelmannia
                                             Engelmannia peristenia
                                                   [Engelmannia pinnatifida]
                                             Engelmannia pinnatifida
                                     Enydra
                                             Enydra sessilis
                                     Epaltes
                                             Epaltes australis
                                     Erato
                                             Erato polymnioides
                                                   [Erato polymnionides]
                                     Erechtites
                                             Erechtites agrestis
                                             Erechtites hieraciifolius
                                                   [Erechtites cacalioides]
                                                   [Erechtites hieracifolia]
                                                   [Erechtites hieraciifolia]
                                               Erechtites hieraciifolius var. hieraciifolius
                                                     [Erechtites hieraciifolia var. cacalioides]
                                                     [Erechtites hieraciifolia var. hieraciifolia]
                                                     [Erechtites hieraciifolia var. intermedia]
                                                     [Erechtites hieraciifolia var. praealta]
                                                     [Erechtites hieraciifolius var. cacalioides]
                                               Erechtites hieraciifolius var. megalocarpa
                                                     [Erechtites hieraciifolia var. megalocarpa]
                                             Erechtites megalocarpa
                                             Erechtites minimus
                                                   [Erechtites minima]
                                                   [Erechtites prenanthoides]
                                             Erechtites valerianifolia
                                     Ericameria
                                             Ericameria X bolanderi
                                                   [Chrysothamnus bolanderi]
                                                   [Chrysothamnus nauseosus ssp. bolanderi]
                                             Ericameria X uintahensis
                                                   [Chrysothamnus nauseosus ssp. uintahensis]
                                                   [Chrysothamnus nauseosus var. uintahensis]
                                             Ericameria X viscosa
                                                   [Chrysothamnus nauseosus ssp. viscosus]
                                             Ericameria albida
                                                   [Chrysothamnus albidus]
                                             Ericameria arborescens
                                                   [Haplopappus arborescens]
                                                   [Linosyris arborescens]
                                             Ericameria arizonica
                                             Ericameria austrotexana
                                             Ericameria bloomeri
                                                   [Haplopappus bloomeri ssp. sonnei]
                                                   [Haplopappus bloomeri var. angustatus]
                                                   [Haplopappus bloomeri var. sonnei]
                                                   [Haplopappus bloomeri]
                                             Ericameria brachylepis
                                                   [Bigelovia brachylepis]
                                                   [Haplopappus propinquus]
                                             Ericameria cervina
                                                   [Haplopappus cervinus]
                                                   [Haplopappus crevinus]
                                             Ericameria compacta
                                                   [Haplopappus bloomeri ssp. compactus]
                                                   [Haplopappus compactus]
                                             Ericameria cooperi
                                                   [Ericameria cooperi var. cooperi]
                                                   [Haplopappus cooperi]
                                             Ericameria crispa
                                                   [Haplopappus crispus]
                                             Ericameria cuneata
                                               Ericameria cuneata var. cuneata
                                                     [Haplopappus cuneatus]
                                               Ericameria cuneata var. macrocephala
                                               Ericameria cuneata var. spathulata
                                                     [Haplopappus cuneatus var. spathulatus]
                                             Ericameria discoidea
                                               Ericameria discoidea var. discoidea
                                                     [Haplopappus macronema var. typicus]
                                                     [Haplopappus macronema]
                                                     [Macronema discoidea]
                                             Ericameria ericoides
                                                   [Diplopappus ericoides]
                                                   [Haplopappus ericoides ssp. blakei]
                                                   [Haplopappus ericoides var. ericoides]
                                                   [Haplopappus ericoides]
                                             Ericameria fasciculata
                                                   [Chrysoma fasciculata]
                                                   [Haplopappus eastwoodiae]
                                             Ericameria gilmanii
                                                   [Haplopappus gilmanii]
                                             Ericameria graminea
                                             Ericameria greenei
                                                   [Haplopappus bloomeri var. greenei]
                                                   [Haplopappus greenei var. mollis]
                                                   [Haplopappus greenei]
                                                   [Macronema greenei]
                                             Ericameria laricifolia
                                                   [Haplopappus laricifolius]
                                             Ericameria lignumviridis
                                                   [Haplopappus lignumviridis]
                                             Ericameria linearifolia
                                                   [Haplopappus linearifolius ssp. interior]
                                                   [Haplopappus linearifolius var. interior]
                                                   [Haplopappus linearifolius]
                                                   [Stenotopsis interior]
                                                   [Stenotopsis linearifolia var. interior]
                                                   [Stenotopsis linearifolia]
                                             Ericameria linearis
                                                   [Ericameria discoidea var. linearis]
                                                   [Haplopappus macronema var. canescens]
                                                   [Haplopappus macronema var. linearis]
                                                   [Macronema lineare var. canescens]
                                                   [Macronema lineare]
                                             Ericameria linifolia
                                             Ericameria microcephala
                                             Ericameria nana
                                                   [Haplopappus nanus]
                                             Ericameria nauseosa
                                               Ericameria nauseosa ssp. ammophila
                                                     [Eriocarpum scabrellum]
                                                     [Haplopappus spinulosus ssp. scabrellus]
                                                     [Haplopappus spinulosus var. scabrellus]
                                               Ericameria nauseosa ssp. consimilis
                                               Ericameria nauseosa var. arenaria
                                               Ericameria nauseosa var. ceruminosa
                                               Ericameria nauseosa var. juncea
                                               Ericameria nauseosa var. leiosperma
                                               Ericameria nauseosa var. mohavensis
                                               Ericameria nauseosa var. nitida
                                               Ericameria nauseosa var. oreophila
                                               Ericameria nauseosa var. turbinata
                                               Ericameria nauseosa ssp. nauseosa
                                               Ericameria nauseosa var. bernardina
                                               Ericameria nauseosa var. bigelovii
                                               Ericameria nauseosa var. graveolens
                                               Ericameria nauseosa var. hololeuca
                                               Ericameria nauseosa var. iridis
                                               Ericameria nauseosa var. latisquamea
                                               Ericameria nauseosa var. nana
                                               Ericameria nauseosa var. nauseosa
                                               Ericameria nauseosa var. psilocarpa
                                               Ericameria nauseosa var. salicifolia
                                               Ericameria nauseosa var. speciosa
                                               Ericameria nauseosa var. texensis
                                               Ericameria nauseosa var. washoensis
                                               Ericameria nauseosa var. arta
                                             Ericameria obovata
                                                   [Haplopappus rydbergii]
                                                   [Haplopappus watsonii var. rydbergii]
                                                   [Macronema obovatum]
                                             Ericameria ophitidis
                                                   [Haplopappus bloomeri var. ophitidis]
                                                   [Haplopappus ophitidis]
                                                   [Haplopappus ophitidus]
                                             Ericameria palmeri
                                               Ericameria palmeri var. pachylepis
                                                     [Haplopappus palmeri ssp. pachylepis]
                                                     [Xylothamia palmeri var. pachylepis]
                                               Ericameria palmeri var. palmeri
                                                     [Haplopappus palmeri]
                                             Ericameria paniculata
                                                   [Chrysothamnus paniculatus]
                                             Ericameria parishii
                                                   [Ericameria parishii var. parishii]
                                                   [Haplopappus parishii]
                                             Ericameria parryi
                                               Ericameria parryi var. affinis
                                               Ericameria parryi var. aspera
                                                     [Ericameria parryi var. aspra]
                                               Ericameria parryi var. attenuata
                                               Ericameria parryi var. howardii
                                               Ericameria parryi var. imula
                                               Ericameria parryi var. latior
                                               Ericameria parryi var. monocephala
                                               Ericameria parryi var. montana
                                               Ericameria parryi var. nevadensis
                                               Ericameria parryi var. parryi
                                               Ericameria parryi var. salmonensis
                                               Ericameria parryi var. vulcanica
                                             Ericameria pinifolia
                                                   [Haplopappus pinifolius]
                                             Ericameria pulchella
                                             Ericameria resinosa
                                                   [Haplopappus resinosus]
                                             Ericameria spathulata
                                             Ericameria suffruticosa
                                                   [Haplopappus suffruticosus]
                                                   [Macronema suffruticosum]
                                             Ericameria teretifolia
                                                   [Chrysothamnus teretifolius]
                                             Ericameria triantha
                                             Ericameria watsonii
                                                   [Haplopappus watsonii]
                                                   [Macronema watsonii]
                                             Ericameria winwardii
                                             Ericameria zionis
                                                   [Haplopappus zionis]
                                     Erigeron
                                           [Trimorpha]
                                             Erigeron abajoensis
                                                   [Erigeron awapensis]
                                             Erigeron acomanus
                                             Erigeron acris
                                               Erigeron acris ssp. decoloratus
                                               Erigeron acris ssp. droebachiensis
                                               Erigeron acris var. acris
                                                     [Erigeron acris ssp. acris]
                                               Erigeron acris var. kamtschaticus
                                                     [Erigeron acris ssp. kamtschaticus]
                                                     [Erigeron acris ssp. politus]
                                                     [Erigeron acris var. asteroides]
                                                     [Erigeron asteroides ssp. politus]
                                                     [Trimorpha acris var. asteroides]
                                                     [Trimorpha acris var. kamtschatica]
                                             Erigeron aequifolius
                                             Erigeron algidus
                                                   [Erigeron petiolaris]
                                             Erigeron aliceae
                                             Erigeron allocotus
                                             Erigeron alpiniformis
                                                   [Erigeron borealis]
                                                   [Trimorpha borealis]
                                             Erigeron alpinus
                                               Erigeron alpinus ssp. intermedius
                                             Erigeron anchana
                                             Erigeron andersonii
                                             Erigeron angulosus
                                             Erigeron annuus
                                                   [Erigeron annuus var. discoideus]
                                                   [Stenactis annua]
                                             Erigeron aphanactis
                                               Erigeron aphanactis var. aphanactis
                                               Erigeron aphanactis var. congestus
                                             Erigeron arenarioides
                                             Erigeron argentatus
                                             Erigeron arisolius
                                             Erigeron arizonicus
                                                   [Erigeron rusbyi]
                                             Erigeron asperugineus
                                             Erigeron asteroides
                                             Erigeron atticus
                                                   [Erigeron villarsii]
                                             Erigeron aurantiacus
                                             Erigeron aureus
                                                   [Erigeron X arthurii]
                                                   [Erigeron aureus var. acutifolius]
                                                   [Erigeron aureus var. aureus]
                                                   [Haplopappus brandegeei]
                                             Erigeron austiniae
                                             Erigeron barbellulatus
                                             Erigeron basalticus
                                             Erigeron bellidiastrum
                                               Erigeron bellidiastrum var. arenarius
                                                     [Erigeron arenarius]
                                               Erigeron bellidiastrum var. bellidiastrum
                                               Erigeron bellidiastrum var. robustus
                                             Erigeron bellioides
                                             Erigeron bigelovii
                                                   [Erigeron biglovii]
                                             Erigeron biolettii
                                                   [Erigeron inornatus var. biolettii]
                                             Erigeron blochmaniae
                                                   [Erigeron foliosus var. blochmaniae]
                                             Erigeron bloomeri
                                               Erigeron bloomeri var. bloomeri
                                                     [Erigeron bloomeri var. pubens]
                                                     [Erigeron bloomeri var. typicus]
                                               Erigeron bloomeri var. nudatus
                                             Erigeron breweri
                                               Erigeron breweri var. bisanctus
                                               Erigeron breweri var. breweri
                                               Erigeron breweri var. covillei
                                                     [Erigeron foliosus var. covillei]
                                               Erigeron breweri var. jacinteus
                                               Erigeron breweri var. porphyreticus
                                             Erigeron caespitosus
                                                   [Erigeron caespitosus var. laccoliticus]
                                             Erigeron calvus
                                             Erigeron canaani
                                             Erigeron candidus
                                             Erigeron canus
                                             Erigeron cascadensis
                                             Erigeron caucasicus
                                               Erigeron caucasicus ssp. venustus
                                             Erigeron cavernensis
                                             Erigeron cervinus
                                                   [Erigeron delicatus]
                                             Erigeron chrysopsidis
                                               Erigeron chrysopsidis var. austiniae
                                                     [Erigeron chrysopsidis ssp. austinae]
                                                     [Erigeron chrysopsidis ssp. austiniae]
                                               Erigeron chrysopsidis var. brevifolius
                                               Erigeron chrysopsidis var. chrysopsidis
                                                     [Erigeron chrysopsidis ssp. chrysopsidis]
                                             Erigeron clokeyi
                                               Erigeron clokeyi var. clokeyi
                                               Erigeron clokeyi var. pinzliae
                                             Erigeron colo-mexicanus
                                             Erigeron compactus
                                             Erigeron compositus
                                                   [Erigeron compositus var. compositus]
                                                   [Erigeron compositus var. discoideus]
                                                   [Erigeron compositus var. glabratus]
                                                   [Erigeron compositus var. multifidus]
                                                   [Erigeron compositus var. typicus]
                                             Erigeron concinnus
                                               Erigeron concinnus var. aphanactis
                                               Erigeron concinnus var. concinnus
                                                     [Distasis concinna]
                                                     [Erigeron brandegeei]
                                                     [Erigeron pumilus ssp. concinnoides]
                                                     [Erigeron pumilus var. concinnus]
                                                     [Erigeron pumilus var. euconcinnoides]
                                               Erigeron concinnus var. condensatus
                                                     [Erigeron condensatus]
                                                     [Erigeron pumilus var. condensatus]
                                               Erigeron concinnus var. subglaber
                                                     [Erigeron perglaber]
                                                     [Erigeron pumilus var. subglaber]
                                                     [Erigeron zothecinus]
                                             Erigeron consimilis
                                                   [Erigeron compactus var. consimilis]
                                             Erigeron corymbosus
                                             Erigeron coulteri
                                             Erigeron cronquistii
                                             Erigeron cuneifolius
                                             Erigeron davisii
                                                   [Erigeron engelmannii ssp. davisii]
                                                   [Erigeron engelmannii var. davisii]
                                             Erigeron decumbens
                                               Erigeron decumbens var. decumbens
                                             Erigeron delphiniifolius
                                             Erigeron denalii
                                                   [Erigeron mexiae]
                                                   [Erigeron purpuratus var. dilatatus]
                                             Erigeron disparipilus
                                             Erigeron divergens
                                                   [Erigeron divergens var. typicus]
                                             Erigeron droebachensis
                                                   [Erigeron droebachianus]
                                             Erigeron eatonii
                                               Erigeron eatonii var. eatonii
                                                     [Erigeron eatonii ssp. typicus]
                                               Erigeron eatonii var. lavandulus
                                               Erigeron eatonii var. nevadincola
                                                     [Erigeron nevadincola]
                                               Erigeron eatonii var. plantagineus
                                                     [Erigeron eatonii ssp. plantagineus]
                                               Erigeron eatonii var. sonnei
                                                     [Erigeron nevadensis var. sonnei]
                                                     [Erigeron sonnei]
                                               Erigeron eatonii var. villosus
                                                     [Erigeron eatonii ssp. villosus]
                                             Erigeron elatior
                                                   [Erigeron grandiflorus var. elatior]
                                             Erigeron elatus
                                                   [Erigeron acris var. elatus]
                                                   [Erigeron alpinus var. elatus]
                                                   [Erigeron elatus var. oligocephalus]
                                                   [Trimorpha elata]
                                             Erigeron elegantulus
                                                   [Erigeron linearis var. elegantulus]
                                             Erigeron elmeri
                                                   [Aster elmeri]
                                                   [Erigeron breweri var. elmeri]
                                             Erigeron elongatus
                                             Erigeron engelmannii
                                                   [Erigeron engelmannii ssp. typicus]
                                                   [Erigeron engelmannii var. engelmannii]
                                             Erigeron eriocephalus
                                             Erigeron eriophyllis
                                             Erigeron eriophyllus
                                             Erigeron evermannii
                                             Erigeron eximius
                                                   [Erigeron superbus]
                                             Erigeron filifolius
                                                   [Erigeron filifolius var. filifolius]
                                                   [Erigeron filifolius var. robustior]
                                                   [Erigeron filifolius var. typicus]
                                             Erigeron flabellifolius
                                             Erigeron flagellaris
                                                   [Erigeron flagellaris var. typicus]
                                                   [Erigeron nudiflorus]
                                               Erigeron flagellaris var. trilobatus
                                               Erigeron flagellaris fma. breviligulatus
                                             Erigeron flettii
                                             Erigeron flexuosus
                                             Erigeron foliosus
                                                   [Erigeron filiosus]
                                               Erigeron foliosus var. confinis
                                               Erigeron foliosus var. foliosus
                                                     [Erigeron foliosus var. stenophyllus]
                                               Erigeron foliosus var. franciscensis
                                               Erigeron foliosus var. hartwegii
                                               Erigeron foliosus var. mendocinus
                                             Erigeron formosissimus
                                                   [Erigeron formosissimus var. formosissimus]
                                                   [Erigeron formosissimus var. typicus]
                                                   [Erigeron formosissimus var. viscidus]
                                                   [Erigeron glabellus var. viscidus]
                                                   [Erigeron viscidus]
                                               Erigeron formosissimus var. formosissimus
                                               Erigeron formosissimus var. viscidus
                                             Erigeron garrettii
                                                   [Erigeron controversus]
                                             Erigeron gaudinii
                                             Erigeron geiseri
                                             Erigeron glabellus
                                               Erigeron glabellus var. glabellus
                                                     [Erigeron asper]
                                                     [Erigeron asperum]
                                                     [Erigeron glabellus ssp. typicus]
                                                     [Erigeron oblanceolatus]
                                               Erigeron glabellus var. pubescens
                                                     [Erigeron anodonta]
                                                     [Erigeron asperum var. pubescens]
                                                     [Erigeron glabellus ssp. pubescens]
                                                     [Erigeron oligodontus]
                                               Erigeron glabellus ssp. pubescens
                                             Erigeron glabratus
                                             Erigeron glacialis
                                                   [Aster glacialis]
                                                   [Erigeron callianthemus]
                                                   [Erigeron peregrinus ssp. callianthemus]
                                                   [Erigeron peregrinus var. eucallianthemus]
                                               Erigeron glacialis var. glacialis
                                               Erigeron glacialis var. hirsutus
                                             Erigeron glaucus
                                             Erigeron goodrichii
                                             Erigeron gracilis
                                             Erigeron grandiflorus
                                                   [Erigeron grandiflorus ssp. grandiflorus]
                                                   [Erigeron simplex]
                                             Erigeron greenei
                                                   [Erigeron angustatus]
                                             Erigeron heliographis
                                             Erigeron hessii
                                             Erigeron howellii
                                             Erigeron hultenii
                                             Erigeron humilis
                                                   [Erigeron uniflorus var. unalaschkensis]
                                             Erigeron hyperboreus
                                                   [Erigeron alaskanus]
                                             Erigeron hyssopifolius
                                                   [Erigeron hyssopifolius var. hyssopifolius]
                                                   [Erigeron hyssopifolius var. villicaulis]
                                             Erigeron inornatus
                                               Erigeron inornatus var. calidipetris
                                               Erigeron inornatus var. inornatus
                                               Erigeron inornatus var. keilii
                                             Erigeron jamaicensis
                                             Erigeron jonesii
                                                   [Erigeron wahwahensis]
                                             Erigeron kachinensis
                                             Erigeron kamtschaticus
                                             Erigeron karvinskianus
                                             Erigeron klamathensis
                                                   [Erigeron breweri var. klamathensis]
                                             Erigeron kuschei
                                             Erigeron lackschewitzii
                                             Erigeron lanatus
                                             Erigeron lassenianus
                                               Erigeron lassenianus var. deficiens
                                               Erigeron lassenianus var. lassenianus
                                             Erigeron latus
                                             Erigeron leibergii
                                             Erigeron leiomerus
                                             Erigeron lemmonii
                                             Erigeron linearis
                                                   [Erigeron peucephyllus]
                                             Erigeron lobatus
                                             Erigeron lonchophyllus
                                                   [Erigeron lonchophyllus var. laurentianus]
                                                   [Erigeron minor]
                                                   [Trimorpha lonchophylla var. laurentiana]
                                                   [Trimorpha lonchophylla var. lonchophylla]
                                                   [Trimorpha lonchophylla]
                                             Erigeron maguirei
                                                   [Erigeron maguirei var. harrisonii]
                                                   [Erigeron maguirei var. maguirei]
                                             Erigeron mancus
                                             Erigeron maniopotamicus
                                             Erigeron mariposanus
                                             Erigeron melanocephalus
                                                   [Erigeron uniflorus var. melanocephalus]
                                             Erigeron mendocinus
                                             Erigeron miser
                                             Erigeron modestus
                                                   [Erigeron lobatus var. warnockii]
                                                   [Erigeron plateauensis]
                                                   [Erigeron warnockii]
                                             Erigeron muirii
                                                   [Erigeron grandiflorus ssp. muirii]
                                             Erigeron multiceps
                                             Erigeron multiradiatus
                                             Erigeron myosotis
                                             Erigeron nanus
                                             Erigeron naudinii
                                             Erigeron nauseosus
                                             Erigeron nematophylloides
                                             Erigeron nematophyllus
                                             Erigeron neomexicanus
                                                   [Erigeron delphiniifolius ssp. neomexicanus]
                                                   [Erigeron delphiniifolius var. euneomexicanus]
                                             Erigeron nevadensis
                                             Erigeron nivalis
                                                   [Erigeron acris ssp. debilis]
                                                   [Erigeron angulosus ssp. debilis]
                                                   [Erigeron debilis]
                                                   [Erigeron jucundus]
                                                   [Erigeron scotteri]
                                                   [Trimorpha acris var. debilis]
                                                   [Trimorpha acris]
                                                   [Trimorpha scotteri]
                                             Erigeron ochroleucus
                                               Erigeron ochroleucus var. ochroleucus
                                                     [Erigeron ochroleucus var. scribneri]
                                               Erigeron ochroleucus var. var scribneri (Canby ex Rydb.) Cron
                                             Erigeron oreganus
                                             Erigeron oreophilus
                                                   [Erigeron delphiniifolius var. oreophilus]
                                             Erigeron orientalis
                                             Erigeron ortegae
                                             Erigeron ovinus
                                             Erigeron oxyodontus
                                             Erigeron oxyphyllus
                                             Erigeron pallens
                                                   [Erigeron purpuratus ssp. pallens]
                                             Erigeron parishii
                                             Erigeron parryi
                                             Erigeron peregrinus
                                               Erigeron peregrinus ssp. peregrinus
                                               Erigeron peregrinus var. peregrinus
                                               Erigeron peregrinus var. thompsonii
                                               Erigeron peregrinus ssp. callianthemus
                                             Erigeron petrophilus
                                               Erigeron petrophilus var. petrophilus
                                               Erigeron petrophilus var. sierrensis
                                               Erigeron petrophilus var. viscidulus
                                                     [Erigeron inornatus var. viscidulus]
                                             Erigeron philadelphicus
                                               Erigeron philadelphicus var. glaber
                                               Erigeron philadelphicus var. philadelphicus
                                                     [Erigeron philadelphicus var. scaturicola]
                                                     [Erigeron purpureus]
                                               Erigeron philadelphicus var. provancheri
                                                     [Erigeron philadelphicus ssp. provancheri]
                                                     [Erigeron provancheri]
                                             Erigeron pinnatisectus
                                                   [Erigeron compositus var. pinnatisectus]
                                             Erigeron piperianus
                                                   [Erigeron piperanus]
                                             Erigeron piscaticus
                                             Erigeron poliospermus
                                               Erigeron poliospermus var. cereus
                                               Erigeron poliospermus var. disciformis
                                               Erigeron poliospermus var. poliospermus
                                                     [Erigeron poliospermus var. typicus]
                                             Erigeron politus
                                             Erigeron polycladus
                                             Erigeron polymorphus
                                             Erigeron porsildii
                                                   [Erigeron grandiflorus ssp. arcticus]
                                             Erigeron pringlei
                                             Erigeron procumbens
                                                   [Aster procumbens]
                                                   [Erigeron myrionactis]
                                                   [Erigeron repens]
                                             Erigeron proselyticus
                                             Erigeron pubescens
                                             Erigeron pulchellus
                                                   [Erigeron bellidifolius]
                                               Erigeron pulchellus var. brauniae
                                               Erigeron pulchellus var. pulchellus
                                               Erigeron pulchellus var. tolsteadii
                                             Erigeron pulcherrimus
                                                   [Erigeron bistiensis]
                                                   [Erigeron pulcherrimus var. pulcherrimus]
                                                   [Erigeron pulcherrimus var. wyomingia]
                                                   [Erigeron wyomingia]
                                             Erigeron pumilus
                                               Erigeron pumilus var. concinnoides
                                               Erigeron pumilus var. intermedius
                                                     [Erigeron pumilus ssp. intermedius]
                                                     [Erigeron pumilus var. euintermedius]
                                               Erigeron pumilus var. pumilus
                                                     [Erigeron pumilus ssp. pumilus]
                                                     [Erigeron pumilus ssp. typicus]
                                             Erigeron purpuratus
                                                   [Erigeron purpuratus var. purpuratus]
                                             Erigeron pygmaeus
                                             Erigeron quercifolius
                                             Erigeron radicatus
                                                   [Erigeron huberi]
                                                   [Erigeron radiatus]
                                             Erigeron ramosus
                                             Erigeron reductus
                                                   [Erigeron inornatus var. reductus]
                                               Erigeron reductus var. angustatus
                                                     [Erigeron inornatus var. angustatus]
                                               Erigeron reductus var. reductus
                                             Erigeron religiosus
                                             Erigeron rhizomatus
                                             Erigeron robustior
                                                   [Erigeron decumbens ssp. robustior]
                                                   [Erigeron decumbens var. robustior]
                                             Erigeron roylei
                                             Erigeron rybius
                                             Erigeron rydbergii
                                             Erigeron salishii
                                             Erigeron salmonensis
                                             Erigeron sanctarum
                                             Erigeron saxatilis
                                             Erigeron sceptrifer
                                             Erigeron schiedeanus
                                             Erigeron scopulinus
                                             Erigeron serpentinus
                                             Erigeron simplex
                                             Erigeron sionis
                                               Erigeron sionis var. sionis
                                               Erigeron sionis var. trilobatus
                                             Erigeron sivinskii
                                             Erigeron sparsifolius
                                                   [Erigeron utahensis var. sparsifolius]
                                             Erigeron speciosus
                                                   [Erigeron conspicuus]
                                                   [Erigeron macranthus]
                                                   [Erigeron speciosus var. conspicuus]
                                                   [Erigeron speciosus var. macranthus]
                                                   [Erigeron speciosus var. speciosus]
                                                   [Erigeron speciosus var. typicus]
                                                   [Erigeron subtrinervis ssp. conspicuus]
                                                   [Erigeron subtrinervis var. conspicuus]
                                               Erigeron speciosus var. macranthus
                                               Erigeron speciosus var. speciosus
                                             Erigeron strigosus
                                               Erigeron strigosus var. calcicola
                                               Erigeron strigosus var. dolomiticola
                                               Erigeron strigosus var. septentrionalis
                                                     [Erigeron strigosus ssp. septentrionalis]
                                               Erigeron strigosus var. strigosus
                                                     [Erigeron annuus ssp. strigosus]
                                                     [Erigeron ramosus var. beyrichii]
                                                     [Erigeron strigosus var. beyrichii]
                                                     [Erigeron strigosus var. discoideus]
                                                     [Erigeron strigosus var. eligulatus]
                                                     [Erigeron strigosus var. typicus]
                                             Erigeron subglaber
                                             Erigeron subtrinervis
                                                   [Erigeron glabellus var. mollis]
                                                   [Erigeron speciosus var. mollis]
                                                   [Erigeron subtrinervis ssp. typicus]
                                                   [Erigeron subtrinervis var. subtrinervis]
                                             Erigeron supplex
                                             Erigeron tenellus
                                             Erigeron tener
                                             Erigeron tenuis
                                             Erigeron thunbergii
                                               Erigeron thunbergii ssp. glabratus
                                                     [Erigeron thunbergii var. glabratus]
                                             Erigeron tracyi
                                                   [Erigeron colomexicanus]
                                                   [Erigeron divergens var. cinereus]
                                             Erigeron traversii
                                             Erigeron trifidus
                                             Erigeron tweedyi
                                             Erigeron uintahensis
                                                   [Erigeron speciosus var. uintahensis]
                                             Erigeron uncialis
                                               Erigeron uncialis var. conjugans
                                                     [Erigeron uncialis ssp. conjugans]
                                               Erigeron uncialis var. uncialis
                                                     [Erigeron uncialis ssp. uncialis]
                                             Erigeron uniflorus
                                               Erigeron uniflorus var. eriocephalus
                                                     [Erigeron uniflorus ssp. eriocephalus]
                                               Erigeron uniflorus var. uniflorus
                                             Erigeron untermannii
                                                   [Erigeron carringtoniae]
                                             Erigeron ursinus
                                             Erigeron utahensis
                                               Erigeron utahensis var. sparsifolius
                                               Erigeron utahensis var. tetrapleuris
                                               Erigeron utahensis var. utahensis
                                                     [Erigeron utahensis var. tetrapleuris]
                                             Erigeron vagus
                                             Erigeron velutipes
                                             Erigeron venustus
                                             Erigeron vernus
                                             Erigeron versicolor
                                                   [Achaetogeron chihuahuensis]
                                                   [Achaetogeron versicolor]
                                                   [Erigeron geiseri var. calcicola]
                                                   [Erigeron gilensis]
                                                   [Erigeron mimegletes]
                                             Erigeron vetensis
                                             Erigeron vicinus
                                             Erigeron vreelandii
                                                   [Erigeron platyphyllus]
                                             Erigeron watsonii
                                                   [Aster watsonii]
                                             Erigeron wilkenii
                                             Erigeron yukonensis
                                                   [Erigeron glabellus var. yukonensis]
                                     Eriocarpum
                                     Eriophyllum
                                             Eriophyllum ambiguum
                                               Eriophyllum ambiguum var. ambiguum
                                               Eriophyllum ambiguum var. paleaceum
                                             Eriophyllum confertiflorum
                                               Eriophyllum confertiflorum var. confertiflorum
                                                     [Eriophyllum confertiflorum var. discoideum]
                                                     [Eriophyllum confertiflorum var. latum]
                                                     [Eriophyllum confertiflorum var. laxiflorum]
                                                     [Eriophyllum confertiflorum var. tridactylum]
                                               Eriophyllum confertiflorum var. tanacetiflorum
                                             Eriophyllum congdonii
                                                   [Eriophyllum nubigenum var. congdonii]
                                             Eriophyllum integrifolium
                                             Eriophyllum jepsonii
                                             Eriophyllum lanatum
                                               Eriophyllum lanatum var. achillioides
                                                     [Eriophyllum lanatum var. achillaeoides]
                                                     [Eriophyllum lanatum var. aphanactis]
                                               Eriophyllum lanatum var. arachnoideum
                                               Eriophyllum lanatum var. croceum
                                               Eriophyllum lanatum var. grandiflorum
                                               Eriophyllum lanatum var. hallii
                                               Eriophyllum lanatum var. integrifolium
                                                     [Eriophyllum lanatum var. cuneatum]
                                                     [Eriophyllum lanatum var. monoense]
                                               Eriophyllum lanatum var. lanatum
                                                     [Eriophyllum lanatum var. typicum]
                                               Eriophyllum lanatum var. lanceolatum
                                               Eriophyllum lanatum var. leucophyllum
                                               Eriophyllum lanatum var. obovatum
                                             Eriophyllum lanosum
                                                   [Antheropeas lanosum]
                                             Eriophyllum latilobum
                                             Eriophyllum mohavense
                                             Eriophyllum multicaule
                                             Eriophyllum nubigenum
                                             Eriophyllum pringlei
                                             Eriophyllum staechadifolium
                                                   [Eriophyllum staechadifolium var. artemisiifolium]
                                                   [Eriophyllum staechadifolium var. depressum]
                                                   [Eriophyllum stoechadifolium var. artemisiifolium]
                                                   [Eriophyllum stoechadifolium var. depressum]
                                                   [Eriophyllum stoechadifolium]
                                             Eriophyllum tanacetiflorum
                                             Eriophyllum wallacei
                                                   [Antheropeas wallacei]
                                                   [Eriophyllum wallacei ssp. australe]
                                                   [Eriophyllum wallacei var. calvescens]
                                                   [Eriophyllum wallacei var. rubellum]
                                     Erlangea
                                     Erythremia
                                     Eschenbachia
                                     Espeletia
                                             Espeletia schultzii
                                     Ethulia
                                     Eucephalus
                                             Eucephalus breweri
                                                   [Aster breweri]
                                                   [Chrysopsis breweri var. multibracteata]
                                                   [Chrysopsis breweri]
                                                   [Chrysopsis gracilis]
                                                   [Chrysopsis wrightii]
                                                   [Heterotheca breweri]
                                             Eucephalus covillei
                                             Eucephalus elegans
                                                   [Aster elegans]
                                                   [Aster perelegans]
                                                   [Eucephalus perelegans]
                                             Eucephalus engelmannii
                                                   [Aster elegans var. engelmannii]
                                                   [Aster engelmannii]
                                             Eucephalus formosus
                                             Eucephalus glabratus
                                                   [Aster brickellioides var. glabratus]
                                                   [Aster siskiyouensis]
                                             Eucephalus glaucescens
                                                   [Aster engelmannii var. glaucescens]
                                                   [Aster glaucescens]
                                             Eucephalus glaucus
                                             Eucephalus gormanii
                                                   [Aster gormanii]
                                             Eucephalus ledophyllus
                                               Eucephalus ledophyllus var. covillei
                                                     [Aster ledophyllus var. covillei]
                                               Eucephalus ledophyllus var. ledophyllus
                                                     [Aster engelmannii var. ledophyllus]
                                                     [Aster ledophyllus var. ledophyllus]
                                             Eucephalus paucicapitatus
                                                   [Aster engelmannii var. paucicapitatus]
                                                   [Aster paucicapitatus]
                                             Eucephalus perelegans
                                             Eucephalus tomentellus
                                                   [Aster brickellioides var. brickellioides]
                                                   [Aster brickellioides]
                                                   [Aster tomentellus]
                                                   [Eucephalus brickellioides]
                                                   [Sericocarpus tomentellus]
                                             Eucephalus vialis
                                                   [Aster vialis]
                                     Euchiton
                                             Euchiton gymnocephalus
                                             Euchiton involucratus
                                             Euchiton japonicus
                                             Euchiton sphaericus
                                     Eupatoriadelphus
                                             Eupatoriadelphus maculatus
                                             Eupatoriadelphus purpureus
                                     Eupatorium
                                             Eupatorium X cordigerum
                                                   [Eupatorium cordigerum]
                                                   [Eupatorium rotundifolium var. cordigerum]
                                             Eupatorium X pinnatifidum
                                                   [Eupatorium eugenei]
                                                   [Eupatorium pectinatum]
                                                   [Eupatorium smithii]
                                             Eupatorium album
                                               Eupatorium album var. album
                                                     [Eupatorium album var. glandulosum]
                                               Eupatorium album var. subvenosum
                                               Eupatorium album var. vaseyi
                                                     [Eupatorium album var. monardifolium]
                                                     [Eupatorium sessilifolium var. vaseyi]
                                             Eupatorium altissimum
                                                   [Eupatorium saltuense]
                                             Eupatorium anomalum
                                             Eupatorium azureum
                                             Eupatorium betonicifolium
                                             Eupatorium bigelovii
                                             Eupatorium borinquense
                                             Eupatorium bruneri
                                             Eupatorium cannabinum
                                             Eupatorium capillifolium
                                             Eupatorium celtidifolium
                                             Eupatorium coelestinum
                                             Eupatorium compositifolium
                                             Eupatorium cordatum
                                             Eupatorium corymbosum
                                             Eupatorium dolicholepis
                                             Eupatorium droserolepis
                                             Eupatorium dubium
                                             Eupatorium falcatum
                                             Eupatorium fendleri
                                             Eupatorium fernaldii
                                             Eupatorium fistulosum
                                             Eupatorium frustratum
                                             Eupatorium geraniifolium
                                             Eupatorium godfreyanum
                                             Eupatorium greggii
                                             Eupatorium holzingeri
                                             Eupatorium hyssopifolium
                                               Eupatorium hyssopifolium var. hyssopifolium
                                                     [Eupatorium hyssopifolium var. calcaratum]
                                               Eupatorium hyssopifolium var. laciniatum
                                             Eupatorium impetiolaris
                                             Eupatorium incarnatum
                                             Eupatorium integrifolium
                                             Eupatorium iresinoides
                                             Eupatorium ivifolium
                                             Eupatorium lancifolium
                                                   [Eupatorium semiserratum var. lancifolium]
                                             Eupatorium lecheifolium
                                             Eupatorium leptophyllum
                                                   [Eupatorium capillifolium var. leptophyllum]
                                             Eupatorium leucolepis
                                               Eupatorium leucolepis var. leucolepis
                                               Eupatorium leucolepis var. novae-angliae
                                             Eupatorium linearifolium
                                                   [Eupatorium cuneifolium]
                                                   [Eupatorium glaucescens]
                                                   [Eupatorium hyssopifolium var. linearifolium]
                                                   [Eupatorium tortifolium]
                                             Eupatorium macrodon
                                             Eupatorium macrophyllum
                                             Eupatorium macropus
                                             Eupatorium maculatum
                                               Eupatorium maculatum ssp. bruneri
                                               Eupatorium maculatum var. bruneri
                                               Eupatorium maculatum var. foliosum
                                               Eupatorium maculatum var. maculatum
                                             Eupatorium magdalenae
                                             Eupatorium microstemon
                                             Eupatorium mikanioides
                                             Eupatorium mohrii
                                                   [Eupatorium recurvans]
                                             Eupatorium mononeurum
                                             Eupatorium odoratum
                                             Eupatorium oteroi
                                             Eupatorium parryi
                                             Eupatorium perfoliatum
                                                   [Eupatorium X polyneuron]
                                                   [Eupatorium X truncatum]
                                                   [Eupatorium chapmanii]
                                                   [Eupatorium cuneatum]
                                                   [Eupatorium perfoliatum var. colpophilum]
                                                   [Eupatorium perfoliatum var. cuneatum]
                                                   [Eupatorium perfoliatum var. perfoliatum]
                                                   [Eupatorium perfoliatum var. truncatum]
                                                   [Eupatorium resinosum var. kentuckiense]
                                                   [Eupatorium serotinum var. polyneuron]
                                             Eupatorium petaloideum
                                             Eupatorium pilosum
                                                   [Eupatorium rotundifolium var. saundersii]
                                             Eupatorium plicatum
                                             Eupatorium polyodon
                                             Eupatorium portoricense
                                             Eupatorium pubescens
                                             Eupatorium purpureum
                                               Eupatorium purpureum var. amoenum
                                               Eupatorium purpureum var. foliosum
                                               Eupatorium purpureum var. holzingeri
                                               Eupatorium purpureum var. purpureum
                                             Eupatorium pycnocephalum
                                             Eupatorium resinosum
                                             Eupatorium roanense
                                             Eupatorium rotundifolium
                                               Eupatorium rotundifolium var. ovatum
                                                     [Eupatorium rotundifolium ssp. ovatum]
                                               Eupatorium rotundifolium var. rotundifolium
                                               Eupatorium rotundifolium var. scabridum
                                             Eupatorium rugosum
                                             Eupatorium scabridum
                                             Eupatorium semiserratum
                                                   [Eupatorium cuneifolium var. semiserratum]
                                             Eupatorium serotinum
                                             Eupatorium sessilifolium
                                                   [Eupatorium sessilifolium var. brittonianum]
                                                   [Eupatorium sessilifolium var. sessilifolium]
                                             Eupatorium sinuatum
                                             Eupatorium solidaginifolium
                                             Eupatorium sonorae
                                             Eupatorium sordidum
                                                   [Bartlettina sordida]
                                             Eupatorium steelei
                                             Eupatorium torreyanum
                                             Eupatorium trifoliatum
                                               Eupatorium trifoliatum var. foliosum
                                             Eupatorium trigonocarpum
                                             Eupatorium triplinerve
                                             Eupatorium urticifolium
                                             Eupatorium vaseyi
                                             Eupatorium verbenifolium
                                             Eupatorium villosum
                                     Euphrosyne
                                             Euphrosyne partheniifolia
                                                   [Euphrosyne parthenifolia]
                                     Eurybia
                                             Eurybia X herveyi
                                             Eurybia avita
                                             Eurybia chlorolepis
                                                   [Aster divaricatus var. chlorolepis]
                                             Eurybia compacta
                                             Eurybia conspicua
                                             Eurybia divaricata
                                             Eurybia eryngiifolia
                                             Eurybia furcata
                                             Eurybia hemispherica
                                                   [Aster paludosus ssp. hemisphericus]
                                                   [Heleastrum hemisphericum]
                                             Eurybia integrifolia
                                             Eurybia jonesiae
                                             Eurybia macrophylla
                                                   [Aster macrophyllus var. apricensis]
                                                   [Aster macrophyllus var. excelsior]
                                                   [Aster macrophyllus var. ianthinus]
                                                   [Aster macrophyllus var. macrophyllus]
                                                   [Aster macrophyllus var. pinguifolius]
                                                   [Aster macrophyllus var. sejunctus]
                                                   [Aster macrophyllus var. velutinus]
                                             Eurybia merita
                                                   [Aster sibiricus var. meritus]
                                             Eurybia mirabilis
                                             Eurybia paludosa
                                                   [Aster paludosus ssp. paludosus]
                                             Eurybia radula
                                                   [Aster radula var. radula]
                                                   [Aster radula var. strictus]
                                             Eurybia radulina
                                                   [Weberaster radulinus]
                                             Eurybia saxicastellii
                                             Eurybia schreberi
                                                   [Eurybia glomerata]
                                             Eurybia sibirica
                                                   [Aster sibiricus ssp. richardsonii]
                                                   [Aster sibiricus var. giganteus]
                                                   [Aster sibiricus var. sibiricus]
                                                   [Eurybia sibirica var. gigantea]
                                             Eurybia spectabilis
                                                   [Aster spectabilis var. cinerascens]
                                                   [Aster spectabilis var. spectabilis]
                                                   [Aster spectabilis var. suffultus]
                                             Eurybia spinulosa
                                             Eurybia surculosa
                                     Euryops
                                             Euryops chrysanthemoides
                                             Euryops multifidus
                                                   [Euryops subcarnosus ssp. vulgaris]
                                             Euryops subcarnosus
                                     Euthamia
                                             Euthamia graminifolia
                                                   [Chrysocoma graminifolia]
                                                   [Euthamia caroliniana]
                                                   [Euthamia floribunda]
                                                   [Euthamia galetorum]
                                                   [Euthamia graminifolia var. galetorum]
                                                   [Euthamia graminifolia var. graminifolia]
                                                   [Euthamia graminifolia var. hirtipes]
                                                   [Euthamia graminifolia var. major]
                                                   [Euthamia graminifolia var. nuttallii]
                                                   [Euthamia hirtipes]
                                                   [Euthamia media]
                                                   [Euthamia microcephala]
                                                   [Euthamia microphylla]
                                                   [Euthamia minor]
                                                   [Euthamia nuttallii]
                                                   [Euthamia remota]
                                                   [Euthamia tenuifolia var. pycnocephala]
                                                   [Euthamia tenuifolia var. tenuifolia]
                                                   [Euthamia tenuifolia]
                                                   [Solidago X hirtipes]
                                                   [Solidago caroliniana]
                                                   [Solidago galetorum]
                                                   [Solidago graminifolia var. galetorum]
                                                   [Solidago graminifolia var. major]
                                                   [Solidago graminifolia var. nuttallii]
                                                   [Solidago graminifolia var. polycephala]
                                                   [Solidago graminifolia]
                                                   [Solidago hirtella]
                                                   [Solidago microcephala]
                                                   [Solidago minor]
                                                   [Solidago moseleyi]
                                                   [Solidago nuttallii]
                                                   [Solidago polycephala]
                                                   [Solidago tenuifolia var. pycnocephala]
                                                   [Solidago tenuifolia]
                                             Euthamia gymnospermoides
                                                   [Euthamia camporum]
                                                   [Euthamia chrysothamnoides]
                                                   [Euthamia glutinosa]
                                                   [Euthamia pulverulenta]
                                                   [Solidago camporum]
                                                   [Solidago chrysothamnoides]
                                                   [Solidago graminifolia var. gymnospermoides]
                                                   [Solidago graminifolia var. media]
                                                   [Solidago gymnospermoides var. callosa]
                                                   [Solidago gymnospermoides]
                                                   [Solidago media]
                                                   [Solidago perglabra]
                                                   [Solidago remota]
                                                   [Solidago texensis]
                                             Euthamia leptocephala
                                                   [Solidago leptocephala]
                                             Euthamia occidentalis
                                                   [Euthamia californica]
                                                   [Euthamia linearifolia]
                                                   [Solidago occidentalis]
                                     Eutrochium
                                             Eutrochium dubium
                                                   [Eupatoriadelphus dubius]
                                             Eutrochium fistulosum
                                                   [Eupatoriadelphus fistulosus]
                                             Eutrochium maculatum
                                                   [Eupatoriadelphus maculatus var. maculatus]
                                                   [Eupatorium purpureum var. maculatum]
                                               Eutrochium maculatum var. bruneri
                                                     [Eupatoriadelphus maculatus var. bruneri]
                                               Eutrochium maculatum var. foliosum
                                                     [Eupatoriadelphus maculatus var. foliosum]
                                               Eutrochium maculatum var. maculatum
                                             Eutrochium purpureum
                                               Eutrochium purpureum var. holzingeri
                                               Eutrochium purpureum var. purpureum
                                             Eutrochium steelei
                                                   [Eupatoriadelphus steelei]
                                     Evax
                                             Evax candida
                                             Evax caulescens
                                             Evax involucrata
                                             Evax multicaulis
                                               Evax multicaulis var. drummondii
                                             Evax prolifera
                                             Evax sparsiflora
                                               Evax sparsiflora var. brevifolia
                                               Evax sparsiflora var. sparsiflora
                                             Evax verna
                                               Evax verna var. drummondii
                                     Facelis
                                             Facelis retusa
                                                   [Facelis apiculata]
                                     Felicia
                                             Felicia amelloides
                                             Felicia amoena
                                             Felicia diffusa
                                             Felicia fruticosa
                                     Filaginopsis
                                             Filaginopsis drummondii
                                     Filago
                                           [Evax]
                                             Filago pyramidata
                                               Filago pyramidata var. pyramidata
                                             Filago vulgaris
                                                   [Gifola germanica]
                                     Filifolium
                                             Filifolium sibiricum
                                     Fitchia
                                             Fitchia speciosa
                                     Flaveria
                                             Flaveria bidentis
                                             Flaveria brownii
                                                   [Flaveria oppositifolia]
                                             Flaveria campestris
                                             Flaveria chlorifolia
                                             Flaveria floridana
                                             Flaveria linearis
                                                   [Flaveria X latifolia]
                                                   [Flaveria latifolia]
                                                   [Flaveria lineris]
                                             Flaveria mcdougallii
                                                   [Flaveria macdougalii]
                                                   [Flaveria macdougallii]
                                             Flaveria trinervia
                                                   [Oedera trinervia]
                                     Fleischmannia
                                             Fleischmannia incarnata
                                             Fleischmannia microstemon
                                             Fleischmannia pycnocephala
                                             Fleischmannia sonorae
                                     Florestina
                                             Florestina tripteris
                                                   [Palafoxia tripteris var. brevis]
                                     Flourensia
                                             Flourensia cernua
                                             Flourensia pringlei
                                     Flyriella
                                             Flyriella parryi
                                     Franseria
                                     Gaertnera
                                     Gaertneria
                                     Gaillardia
                                             Gaillardia X grandiflora
                                             Gaillardia aestivalis
                                                   [Gaillardia aestivalis var. aestivalis]
                                                   [Gaillardia aestivalis var. flavovirens]
                                                   [Gaillardia aestivalis var. winkleri]
                                                   [Gaillardia chrysantha]
                                                   [Gaillardia fastigiata]
                                                   [Gaillardia lanceolata var. fastigiata]
                                                   [Gaillardia lanceolata var. flavovirens]
                                                   [Gaillardia lanceolata]
                                                   [Gaillardia lutea var. winkleri]
                                                   [Gaillardia lutea]
                                                   [Gaillardia rigida]
                                                   [Gaillardia serotina]
                                             Gaillardia amblyodon
                                             Gaillardia aristata
                                             Gaillardia arizonica
                                                   [Gaillardia arizonica var. arizonica]
                                                   [Gaillardia arizonica var. pringlei]
                                                   [Gaillardia pringlei]
                                             Gaillardia coahuilensis
                                                   [Gaillardia mexicana]
                                             Gaillardia multiceps
                                                   [Gaillardia multiceps var. microcephala]
                                                   [Gaillardia multiceps var. multiceps]
                                             Gaillardia parryi
                                             Gaillardia pinnatifida
                                                   [Gaillardia flava]
                                                   [Gaillardia gracilis]
                                                   [Gaillardia mearnsii]
                                                   [Gaillardia pinnatifida var. linearis]
                                                   [Gaillardia pinnatifida var. pinnatifida]
                                             Gaillardia pulchella
                                                   [Gaillardia drummondii]
                                                   [Gaillardia neomexicana]
                                                   [Gaillardia picta]
                                                   [Gaillardia pulchella var. australis]
                                                   [Gaillardia pulchella var. picta]
                                                   [Gaillardia pulchella var. pulchella]
                                                   [Gaillardia villosa]
                                             Gaillardia spathulata
                                                   [Gaillardia spatulata]
                                             Gaillardia suavis
                                                   [Agassizia suavis]
                                                   [Gaillardia trinervata]
                                             Gaillardia x x grandiflora
                                     Galatella
                                             Galatella punctata
                                     Galinsoga
                                           [Adventina]
                                             Galinsoga parviflora
                                               Galinsoga parviflora var. parviflora
                                               Galinsoga parviflora var. semicalva
                                                     [Galinsoga semicalva var. percalva]
                                                     [Galinsoga semicalva]
                                             Galinsoga quadriradiata
                                                   [Adventina ciliata]
                                                   [Galinsoga aristulata]
                                                   [Galinsoga bicolorata]
                                                   [Galinsoga caracasana]
                                                   [Vargasia caracassana]
                                             Galinsoga urticifolia
                                     Gamochaeta
                                             Gamochaeta americana
                                                   [Gamochaeta spicata]
                                                   [Gnaphalium purpureum var. americanum]
                                             Gamochaeta antillana
                                             Gamochaeta argyrinea
                                             Gamochaeta calviceps
                                             Gamochaeta chionesthes
                                             Gamochaeta coarctata
                                             Gamochaeta falcata
                                             Gamochaeta pensylvanica
                                                   [Gamochaeta pennsylvanica]
                                                   [Gnaphalium purpureum var. spathulatum]
                                             Gamochaeta purpurea
                                             Gamochaeta simplicicaulis
                                             Gamochaeta sphacelata
                                                   [Gamochaeta sphacilata]
                                             Gamochaeta stachydifolia
                                             Gamochaeta stagnalis
                                                   [Gnaphalium purpureum var. falcatum]
                                             Gamochaeta ustulata
                                                   [Gnaphalium purpureum var. ustulatum]
                                     Garberia
                                             Garberia heterophylla
                                                   [Garberia fruticosa]
                                     Gazania
                                             Gazania linearis
                                                   [Gazania longiscapa]
                                                   [Gorteria linearis]
                                             Gazania rigens
                                                   [Gazania splendens]
                                     Geraea
                                             Geraea canescens
                                                   [Geraea canescens var. canescens]
                                                   [Geraea canescens var. paniculata]
                                             Geraea viscida
                                     Gerbera
                                             Gerbera jamesonii
                                     Gifola
                                     Glebionis
                                             Glebionis coronarium
                                             Glebionis segetum
                                     Glossogyne
                                             Glossogyne tenuifolia
                                     Glyptopleura
                                             Glyptopleura marginata
                                             Glyptopleura setulosa
                                     Gnaphalium
                                           [Filaginella]
                                             Gnaphalium americanum
                                             Gnaphalium arvense
                                             Gnaphalium calviceps
                                             Gnaphalium collinum
                                             Gnaphalium domingense
                                                   [Gnaphalium portoricense]
                                                   [Pseudognaphalium domingense]
                                             Gnaphalium exilifolium
                                                   [Gnaphalium grayi]
                                             Gnaphalium falcatum
                                             Gnaphalium germanicum
                                             Gnaphalium gymnocephalus
                                             Gnaphalium hawaiiense
                                             Gnaphalium helleri
                                             Gnaphalium japonicum
                                             Gnaphalium norvegicum
                                             Gnaphalium palustre
                                                   [Filaginella palustris]
                                             Gnaphalium pensylvanicum
                                             Gnaphalium peregrinum
                                             Gnaphalium polycaulon
                                                   [Gnaphalium indicum]
                                             Gnaphalium purpureum
                                             Gnaphalium sandwicensium
                                             Gnaphalium spathulatum
                                             Gnaphalium sphacilatum
                                             Gnaphalium spicatum
                                             Gnaphalium supinum
                                             Gnaphalium sylvaticum
                                             Gnaphalium uliginosum
                                                   [Filaginella ulginosa]
                                                   [Filaginella uliginosa]
                                             Gnaphalium ustulatum
                                             Gnaphalium virgatum
                                     Gochnatia
                                             Gochnatia hypoleuca
                                     Gonotheca
                                     Gorteria
                                     Greenella
                                     Grindelia
                                           [Prionopsis]
                                             Grindelia adenodonta
                                                   [Grindelia microcephala var. adenodonta]
                                             Grindelia aphanactis
                                             Grindelia arizonica
                                                   [Grindelia arizonica var. arizonica]
                                                   [Grindelia arizonica var. dentata]
                                                   [Grindelia arizonica var. microphylla]
                                                   [Grindelia arizonica var. neomexicana]
                                                   [Grindelia arizonica var. stenophylla]
                                                   [Grindelia laciniata]
                                                   [Grindelia neomexicana]
                                                   [Grindelia scabra var. neomexicana]
                                               Grindelia arizonica var. stenophylla
                                             Grindelia ciliata
                                                   [Grindelia papposa]
                                                   [Haplopappus ciliatus]
                                                   [Prionopsis ciliata]
                                             Grindelia decumbens
                                                   [Grindelia decumbens var. decumbens]
                                                   [Grindelia decumbens var. subincisa]
                                               Grindelia decumbens var. decumbens
                                               Grindelia decumbens var. subincisa
                                             Grindelia fastigiata
                                             Grindelia fraxinipratensis
                                                   [Grindelia fraxino-pratensis]
                                                   [Grindelia fraxinopratensis]
                                             Grindelia grandiflora
                                             Grindelia gymnospermoides
                                             Grindelia havardii
                                             Grindelia hirsutula
                                                   [Grindelia acutifolia]
                                                   [Grindelia arenicola]
                                                   [Grindelia camporum var. bracteosa]
                                                   [Grindelia camporum var. camporum]
                                                   [Grindelia camporum var. parviflora]
                                                   [Grindelia camporum]
                                                   [Grindelia columbiana]
                                                   [Grindelia fastigiata]
                                                   [Grindelia hallii]
                                                   [Grindelia hirsutula ssp. hirsutula]
                                                   [Grindelia hirsutula ssp. rubricaulis]
                                                   [Grindelia hirsutula var. davyi]
                                                   [Grindelia hirsutula var. hallii]
                                                   [Grindelia hirsutula var. hirsutula]
                                                   [Grindelia hirsutula var. maritima]
                                                   [Grindelia humilis]
                                                   [Grindelia inornata var. angusta]
                                                   [Grindelia inornata var. inornata]
                                                   [Grindelia inornata]
                                                   [Grindelia integrifolia var. macrophylla]
                                                   [Grindelia latifolia ssp. platyphylla]
                                                   [Grindelia latifolia var. latifolia]
                                                   [Grindelia latifolia var. platyphylla]
                                                   [Grindelia latifolia]
                                                   [Grindelia maritima]
                                                   [Grindelia nana ssp. columbiana]
                                                   [Grindelia nana var. discoidea]
                                                   [Grindelia nana var. integerrima]
                                                   [Grindelia nana var. integrifolia]
                                                   [Grindelia nana var. nana]
                                                   [Grindelia nana]
                                                   [Grindelia paludosa]
                                                   [Grindelia perennis]
                                                   [Grindelia procera]
                                                   [Grindelia revoluta]
                                                   [Grindelia robusta var. angustifolia]
                                                   [Grindelia robusta var. bracteosa]
                                                   [Grindelia robusta var. robusta]
                                                   [Grindelia robusta]
                                                   [Grindelia squarrosa var. integrifolia]
                                                   [Grindelia squarrosa var. quasiperennis]
                                                   [Grindelia stricta ssp. blakei]
                                                   [Grindelia stricta ssp. venulosa]
                                                   [Grindelia stricta var. angustifolia]
                                                   [Grindelia stricta var. platyphylla]
                                                   [Grindelia stricta var. stricta]
                                                   [Grindelia stricta]
                                             Grindelia howellii
                                             Grindelia inornata
                                             Grindelia integrifolia
                                                   [Grindelia integrifolia var. integrifolia]
                                             Grindelia lanceolata
                                                   [Grindelia lanceolata var. lanceolata]
                                                   [Grindelia lanceolata var. texana]
                                                   [Grindelia littoralis]
                                                   [Grindelia texana var. lanceolata]
                                                   [Grindelia texana]
                                             Grindelia microcephala
                                                   [Grindelia microcephala var. microcephala]
                                             Grindelia oolepis
                                             Grindelia oxylepis
                                             Grindelia pusilla
                                                   [Grindelia microcephala var. pusilla]
                                             Grindelia revoluta
                                             Grindelia scabra
                                             Grindelia squarrosa
                                                   [Grindelia aphanactis]
                                                   [Grindelia nuda var. aphanactis]
                                                   [Grindelia nuda var. nuda]
                                                   [Grindelia nuda]
                                                   [Grindelia serrulata]
                                                   [Grindelia squarrosa var. nuda]
                                                   [Grindelia squarrosa var. serrulata]
                                                   [Grindelia squarrosa var. squarrosa]
                                               Grindelia squarrosa var. nuda
                                               Grindelia squarrosa var. quasiperennis
                                               Grindelia squarrosa var. serrulata
                                             Grindelia subalpina
                                                   [Grindelia subalpina var. erecta]
                                                   [Grindelia subalpina var. subalpina]
                                     Grossheimia
                                             Grossheimia macrocephala
                                     Guardiola
                                             Guardiola platyphylla
                                     Guizotia
                                             Guizotia abyssinica
                                     Gundelia
                                             Gundelia tournefortii
                                     Gundlachia
                                           [Xylothamia]
                                             Gundlachia corymbosa
                                             Gundlachia triantha
                                                   [Haplopappus trianthus]
                                                   [Xylothamia triantha]
                                     Gutierrezia
                                             Gutierrezia arizonica
                                                   [Greenella arizonica]
                                                   [Xanthocephalum arizonicum]
                                             Gutierrezia californica
                                                   [Gutierrezia bracteata]
                                             Gutierrezia dracunculoides
                                             Gutierrezia elegans
                                             Gutierrezia glutinosa
                                             Gutierrezia gymnospermoides
                                             Gutierrezia microcephala
                                                   [Brachyris microcephala]
                                                   [Gutierrezia glomerella]
                                                   [Gutierrezia lucida]
                                                   [Gutierrezia sarothrae var. microcephala]
                                                   [Xanthocephalum lucidum]
                                                   [Xanthocephalum microcephalum]
                                             Gutierrezia petradoria
                                                   [Xanthocephalum petradoria]
                                             Gutierrezia pomariensis
                                                   [Gutierrezia sarothrae var. pomariensis]
                                                   [Xanthocephalum sarothrae var. pomariense]
                                             Gutierrezia sarothrae
                                                   [Gutierrezia diversifolia]
                                                   [Gutierrezia lepidota]
                                                   [Gutierrezia linearifolia]
                                                   [Gutierrezia linearis]
                                                   [Gutierrezia linoides]
                                                   [Gutierrezia longipappa]
                                                   [Gutierrezia tenuis]
                                                   [Solidago sarothrae]
                                                   [Xanthocephalum sarothrae]
                                                   [Xanthocephalum tenue]
                                             Gutierrezia serotina
                                                   [Gutierrezia polyantha]
                                             Gutierrezia sphaerocephala
                                                   [Gutierrezia eriocarpa]
                                                   [Xanthocephalum sphaerocephalum var. eriocarpum]
                                                   [Xanthocephalum sphaerocephalum]
                                             Gutierrezia texana
                                               Gutierrezia texana var. glutinosa
                                                     [Hemiachyris glutinosa]
                                               Gutierrezia texana var. texana
                                                     [Hemiachyris texana]
                                                     [Xanthocephalum texanum]
                                             Gutierrezia triflora
                                             Gutierrezia wrightii
                                                   [Greenella discoidea]
                                                   [Xanthocephalum wrightii]
                                     Gymnolomia
                                     Gymnosperma
                                             Gymnosperma glutinosum
                                                   [Selloa glutinosa]
                                                   [Xanthocephalum glutinosum]
                                     Gynura
                                             Gynura aurantiaca
                                     Halea
                                     Hamulium
                                     Haplocarpha
                                             Haplocarpha lyrata
                                     Haploesthes
                                             Haploesthes greggii
                                               Haploesthes greggii var. greggii
                                               Haploesthes greggii var. texana
                                     Haplopappus
                                             Haplopappus alpigenus
                                             Haplopappus foliosus
                                             Haplopappus gooddingii
                                             Haplopappus paniculatus
                                             Haplopappus squarrosus
                                             Haplopappus texensis
                                             Haplopappus validus
                                             Haplopappus whitneyi
                                     Harmonia
                                             Harmonia doris-nilesiae
                                             Harmonia guggolziorum
                                             Harmonia hallii
                                             Harmonia nutans
                                             Harmonia stebbinsii
                                     Hartwrightia
                                             Hartwrightia floridana
                                     Hasteola
                                           [Synosma]
                                             Hasteola robertiorum
                                     Hazardia
                                             Hazardia brickellioides
                                                   [Haplopappus brickellioides]
                                             Hazardia cana
                                                   [Haplopappus canus]
                                             Hazardia detonsa
                                                   [Haplopappus detonsus]
                                             Hazardia orcuttii
                                             Hazardia squarrosa
                                               Hazardia squarrosa var. grindelioides
                                                     [Haplopappus squarrosus ssp. grindelioides]
                                               Hazardia squarrosa var. obtusa
                                                     [Haplopappus squarrosus ssp. obtusus]
                                               Hazardia squarrosa var. squarrosa
                                                     [Haplopappus squarrosus var. squarrosus]
                                             Hazardia stenolepis
                                                   [Haplopappus squarrosus ssp. stenolepis]
                                             Hazardia whitneyi
                                               Hazardia whitneyi var. discoidea
                                                     [Haplopappus whitneyi ssp. discoideus]
                                               Hazardia whitneyi var. whitneyi
                                                     [Haplopappus whitneyi var. whitneyi]
                                     Hebeclinium
                                             Hebeclinium macrophyllum
                                     Hecastocleis
                                             Hecastocleis shockleyi
                                     Hedosyne
                                             Hedosyne ambrosiifolia
                                                   [Iva ambrosiifolia ssp. lobata]
                                                   [Iva ambrosiifolia var. ambrosiifolia]
                                     Hedypnois
                                             Hedypnois cretica
                                     Heleastrum
                                     Helenium
                                             Helenium X polyphyllum
                                             Helenium amarum
                                               Helenium amarum var. amarum
                                               Helenium amarum var. badium
                                                     [Helenium tenuifolium var. badium]
                                             Helenium amphilobum
                                             Helenium apterum
                                             Helenium arizonicum
                                             Helenium autumnale
                                                   [Helenium autumnale var. autumnale]
                                                   [Helenium autumnale var. canaliculatum]
                                                   [Helenium autumnale var. fylesii]
                                                   [Helenium autumnale var. grandiflorum]
                                                   [Helenium autumnale var. montanum]
                                                   [Helenium autumnale var. parviflorum]
                                                   [Helenium canaliculatum]
                                                   [Helenium latifolium]
                                                   [Helenium macranthum]
                                                   [Helenium montanum]
                                                   [Helenium parviflorum]
                                               Helenium autumnale var. montanum
                                             Helenium badium
                                             Helenium bigelovii
                                                   [Helenium rivulare]
                                             Helenium bolanderi
                                                   [Dugaldia grandiflora]
                                                   [Helenium bigelovii var. festivum]
                                             Helenium brevifolium
                                                   [Helenium curtisii]
                                             Helenium campestre
                                             Helenium drummondii
                                                   [Helenium fimbriatum]
                                                   [Leptopoda fimbriata]
                                             Helenium elegans
                                               Helenium elegans var. amphilobum
                                               Helenium elegans var. elegans
                                             Helenium flexuosum
                                                   [Helenium floridanum]
                                                   [Helenium godfreyi]
                                                   [Helenium nudiflorum]
                                             Helenium hoopesii
                                             Helenium lanciniatum
                                             Helenium linifolium
                                             Helenium microcephalum
                                               Helenium microcephalum var. microcephalum
                                               Helenium microcephalum var. ooclinium
                                                     [Helenium ooclinium]
                                             Helenium pinnatifidum
                                                   [Helenium incisum]
                                             Helenium puberulum
                                                   [Helenium decurrens]
                                             Helenium quadridentatum
                                             Helenium setigerum
                                             Helenium tenuifolium
                                             Helenium thurberi
                                             Helenium vernale
                                                   [Helenium helenium]
                                                   [Helenium nuttallii]
                                             Helenium virginicum
                                     Helianthella
                                             Helianthella californica
                                               Helianthella californica ssp. californica
                                                     [Helianthella californica var. californica]
                                               Helianthella californica ssp. nevadensis
                                                     [Helianthella californica var. nevadensis]
                                               Helianthella californica ssp. shastensis
                                                     [Helianthella californica var. shastensis]
                                             Helianthella castanea
                                             Helianthella grandiflora
                                             Helianthella microcephala
                                                   [Encelia microcephala]
                                             Helianthella parryi
                                             Helianthella pringlei
                                             Helianthella quinquenervis
                                                   [Helianthus quinquenervis]
                                             Helianthella tenuifolia
                                             Helianthella uniflora
                                                   [Helianthella uniflora var. douglasii]
                                                   [Helianthella uniflora var. uniflora]
                                                   [Helianthus uniflorus]
                                     Helianthus
                                             Helianthus X ambiguus
                                             Helianthus X brevifolius
                                             Helianthus X cinereus
                                                   [Helianthus cinereus var. sullivantii]
                                             Helianthus X divariserratus
                                             Helianthus X doronicoides
                                                   [Helianthus pilosus]
                                             Helianthus X glaucus
                                             Helianthus X intermedius
                                             Helianthus X kellermanii
                                             Helianthus X laetiflorus
                                                   [Helianthus scaberrimus]
                                             Helianthus X luxurians
                                             Helianthus X multiflorus
                                             Helianthus X orgyaloides
                                             Helianthus X verticillatus
                                             Helianthus agrestis
                                             Helianthus angustifolius
                                                   [Helianthus agustifolius]
                                                   [Helianthus angustifolius var. planifolius]
                                             Helianthus annuus
                                                   [Helianthus annuus ssp. jaegeri]
                                                   [Helianthus annuus ssp. lenticularis]
                                                   [Helianthus annuus ssp. texanus]
                                                   [Helianthus annuus var. lenticularis]
                                                   [Helianthus annuus var. macrocarpus]
                                                   [Helianthus annuus var. texanus]
                                                   [Helianthus aridus]
                                                   [Helianthus lenticularis]
                                             Helianthus anomalus
                                             Helianthus argophyllus
                                                   [Helianthus argophyllis]
                                             Helianthus aristatus
                                             Helianthus arizonensis
                                                   [Helianthus arizonicus]
                                             Helianthus atrorubens
                                                   [Helianthus atrorubens var. alsodes]
                                             Helianthus bolanderi
                                             Helianthus californicus
                                             Helianthus carnosus
                                             Helianthus ciliaris
                                             Helianthus cinereus
                                             Helianthus cucumerifolius
                                             Helianthus cusickii
                                             Helianthus debilis
                                               Helianthus debilis ssp. cucumerifolius
                                                     [Helianthus debilis var. cucumerifolius]
                                               Helianthus debilis ssp. debilis
                                               Helianthus debilis ssp. silvestris
                                                     [Helianthus debilis var. silvestris]
                                               Helianthus debilis ssp. tardiflorus
                                                     [Helianthus debilis var. tardiflorus]
                                               Helianthus debilis ssp. vestitus
                                                     [Helianthus debilis var. vestitus]
                                             Helianthus decapetalus
                                                   [Helianthus decapetalis]
                                                   [Helianthus scrophulariifolius]
                                                   [Helianthus tracheliifolius]
                                             Helianthus dentatus
                                             Helianthus deserticola
                                             Helianthus divaricatus
                                                   [Helianthus divaricatus var. angustifolius]
                                             Helianthus dowellianus
                                             Helianthus eggertii
                                             Helianthus exilis
                                             Helianthus floridanus
                                             Helianthus giganteus
                                                   [Helianthus alienus]
                                                   [Helianthus borealis]
                                                   [Helianthus giganteus ssp. alienus]
                                                   [Helianthus giganteus var. subtuberosus]
                                                   [Helianthus nuttallii var. subtuberosus]
                                                   [Helianthus subtuberosus]
                                                   [Helianthus validus]
                                             Helianthus glaucophyllus
                                             Helianthus gracilentus
                                             Helianthus grosseserratus
                                                   [Helianthus grosseserratus ssp. maximus]
                                                   [Helianthus grosseserratus var. hypoleucus]
                                                   [Helianthus instabilis]
                                             Helianthus heterophyllus
                                             Helianthus hirsutus
                                                   [Helianthus hirsutus var. stenophyllus]
                                                   [Helianthus hirsutus var. trachyphyllus]
                                                   [Helianthus stenophyllus]
                                             Helianthus laciniatus
                                                   [Helianthus crenatus]
                                                   [Helianthus heiseri]
                                             Helianthus laetiflorus
                                             Helianthus laevigatus
                                                   [Helianthus reindutus]
                                             Helianthus longifolius
                                             Helianthus ludens
                                             Helianthus maximiliani
                                                   [Helianthus dalyi]
                                             Helianthus microcephalus
                                             Helianthus mollis
                                                   [Helianthus mollis var. cordatus]
                                             Helianthus neglectus
                                             Helianthus niveus
                                               Helianthus niveus ssp. niveus
                                                     [Helianthus niveus var. niveus]
                                               Helianthus niveus ssp. tephrodes
                                             Helianthus nuttallii
                                                   [Helianthus X alexidis]
                                               Helianthus nuttallii ssp. nuttallii
                                                     [Helianthus fascicularis]
                                                     [Helianthus nuttallii ssp. canadensis]
                                                     [Helianthus nuttallii ssp. coloradensis]
                                               Helianthus nuttallii ssp. parishii
                                                     [Helianthus parishii]
                                               Helianthus nuttallii ssp. rydbergii
                                                     [Helianthus nuttallii var. rydbergii]
                                                     [Helianthus rydbergii]
                                             Helianthus occidentalis
                                               Helianthus occidentalis ssp. occidentalis
                                                     [Helianthus occidentalis var. dowellianus]
                                               Helianthus occidentalis ssp. plantagineus
                                                     [Helianthus occidentalis var. plantagineus]
                                             Helianthus paradoxus
                                             Helianthus pauciflorus
                                               Helianthus pauciflorus ssp. pauciflorus
                                                     [Helianthus laetiflorus var. rigidus]
                                                     [Helianthus rigidus var. rigidus]
                                               Helianthus pauciflorus ssp. subrhomboideus
                                                     [Helianthus laetiflorus var. subrhomboideus]
                                                     [Helianthus pauciflorus var. subrhomboideus]
                                                     [Helianthus rigidus ssp. laetiflorus]
                                                     [Helianthus rigidus var. subrhomboideus]
                                             Helianthus petiolaris
                                                   [Helianthus canescens]
                                                   [Helianthus canus]
                                                   [Helianthus niveus ssp. canescens]
                                                   [Helianthus petiolaris var. canescens]
                                               Helianthus petiolaris ssp. fallax
                                                     [Helianthus petiolaris var. fallax]
                                               Helianthus petiolaris ssp. petiolaris
                                                     [Helianthus couplandii]
                                             Helianthus porteri
                                                   [Heliomeris porteri]
                                                   [Viguiera porteri]
                                             Helianthus praecox
                                               Helianthus praecox ssp. hirtus
                                                     [Helianthus debilis ssp. hirtus]
                                               Helianthus praecox ssp. praecox
                                                     [Helianthus debilis ssp. praecox]
                                               Helianthus praecox ssp. runyonii
                                                     [Helianthus debilis ssp. runyonii]
                                                     [Helianthus praecox var. runyonii]
                                             Helianthus praetermissus
                                             Helianthus pumilus
                                             Helianthus radula
                                             Helianthus resinosus
                                             Helianthus rigidus
                                               Helianthus rigidus ssp. subrhomboideus
                                             Helianthus salicifolius
                                                   [Helianthus filiformis]
                                                   [Helianthus orgyalis]
                                             Helianthus schweinitzii
                                             Helianthus silphioides
                                                   [Helianthus atrorubens var. pubescens]
                                             Helianthus simulans
                                             Helianthus smithii
                                             Helianthus strumosus
                                                   [Helianthus montanus]
                                                   [Helianthus saxicola]
                                             Helianthus subrhomboideus
                                             Helianthus tephrodes
                                             Helianthus tuberosus
                                                   [Helianthus tuberosus var. subcanescens]
                                             Helianthus verticillatus
                                             Helianthus vestitus
                                     Helichrysum
                                             Helichrysum bracteatum
                                             Helichrysum foetidum
                                             Helichrysum formosissimum
                                             Helichrysum petiolare
                                                   [Helichrysum petiolatum]
                                             Helichrysum tianshanicum
                                     Heliomeris
                                             Heliomeris hispida
                                                   [Gymnolomia hispida var. ciliata]
                                                   [Gymnolomia hispida]
                                                   [Heliomeris ciliata]
                                                   [Viguiera ciliata]
                                             Heliomeris longifolia
                                               Heliomeris longifolia var. annua
                                                     [Heliomeris annua]
                                                     [Viguiera annua]
                                                     [Viguiera longifolia var. annua]
                                               Heliomeris longifolia var. longifolia
                                                     [Gymnolomia longifolia]
                                                     [Viguiera longifolia]
                                             Heliomeris multiflora
                                               Heliomeris multiflora var. brevifolia
                                                     [Viguiera ovalis]
                                               Heliomeris multiflora var. macrocephala
                                                     [Viguiera multiflora var. macrocephala]
                                               Heliomeris multiflora var. multiflora
                                                     [Viguiera multiflora]
                                               Heliomeris multiflora var. nevadensis
                                                     [Viguiera multiflora var. nevadensis]
                                             Heliomeris soliceps
                                                   [Viguiera soliceps]
                                             Heliomeris tenuifolia
                                     Heliopsis
                                             Heliopsis gracilis
                                                   [Heliopsis helianthoides var. gracilis]
                                             Heliopsis helianthoides
                                               Heliopsis helianthoides var. helianthoides
                                                     [Heliopsis helianthoides var. solidaginoides]
                                               Heliopsis helianthoides var. scabra
                                                     [Heliopsis helianthoides ssp. occidentalis]
                                                     [Heliopsis helianthoides ssp. scabra]
                                                     [Heliopsis helianthoides var. occidentalis]
                                                     [Heliopsis minor]
                                                     [Heliopsis scabra]
                                             Heliopsis parvifolia
                                     Helipterum
                                             Helipterum roseum
                                     Helminthotheca
                                             Helminthotheca echioides
                                                   [Picris echioides]
                                     Hemiachyris
                                     Hemizonella
                                             Hemizonella minima
                                     Hemizonia
                                             Hemizonia australis
                                             Hemizonia calyculata
                                             Hemizonia cleavelandii
                                             Hemizonia clevelandii
                                             Hemizonia congesta
                                               Hemizonia congesta ssp. calyculata
                                               Hemizonia congesta ssp. clevelandii
                                               Hemizonia congesta ssp. congesta
                                                     [Hemizonia congesta ssp. leucocephala]
                                               Hemizonia congesta ssp. lutescens
                                                     [Hemizonia congesta ssp. vernalis]
                                                     [Hemizonia luzulifolia var. lutescens]
                                                     [Hemizonia multicaulis ssp. vernalis]
                                                     [Hemizonia multicaulis var. multicaulis]
                                               Hemizonia congesta ssp. luzulifolia
                                                     [Hemizonia luzulifolia ssp. luzulifolia]
                                                     [Hemizonia luzulifolia ssp. rudis]
                                               Hemizonia congesta ssp. tracyi
                                                     [Hemizonia luzulifolia ssp. tracyi]
                                             Hemizonia increscens
                                             Hemizonia laevis
                                             Hemizonia leucocephala
                                             Hemizonia lutescens
                                             Hemizonia luzulifolia
                                             Hemizonia multicaulis
                                             Hemizonia multiglandulosa
                                             Hemizonia parryi
                                             Hemizonia pugens
                                             Hemizonia pungens
                                             Hemizonia tracyi
                                             Hemizonia truncata
                                     Herrickia
                                             Herrickia glauca
                                                   [Aster glaucodes]
                                                   [Aster glaucus]
                                                   [Eucephalus glaucus]
                                                   [Eurybia glauca]
                                               Herrickia glauca var. glauca
                                                     [Aster glaucodes var. formosus]
                                                     [Aster glaucodes var. glaucodes]
                                               Herrickia glauca var. pulchra
                                                     [Aster glaucodes ssp. pulcher]
                                                     [Aster glaucodes var. pulcher]
                                                     [Aster glaucodew var. pulcher]
                                                     [Aster glaucus var. pulcher]
                                                     [Eurybia pulchra]
                                             Herrickia horrida
                                                   [Aster horridus]
                                                   [Eurybia horrida]
                                             Herrickia kingii
                                                   [Aster kingii]
                                                   [Machaeranthera kingii]
                                                   [Tonestus kingii]
                                               Herrickia kingii var. barnebyana
                                                     [Aster kingii var. barnebyana]
                                                     [Machaeranthera kingii var. barnebyana]
                                                     [Tonestus kingii var. barnebyana]
                                               Herrickia kingii var. kingii
                                                     [Aster kingii var. kingii]
                                                     [Tonestus kingii var. kingii]
                                             Herrickia wasatchensis
                                                   [Aster glauca var. wasatchensis]
                                                   [Aster glaucus var. wasatchensis]
                                                   [Aster wasatchensis]
                                                   [Eurybia wasatchensis]
                                     Hertia
                                             Hertia cheirifolia
                                     Hesperevax
                                             Hesperevax acaulis
                                               Hesperevax acaulis var. acaulis
                                               Hesperevax acaulis var. ambusticola
                                               Hesperevax acaulis var. robustior
                                             Hesperevax caulescens
                                                   [Evax caulescens var. humilis]
                                                   [Evax caulescens var. petiolata]
                                             Hesperevax sparsiflora
                                               Hesperevax sparsiflora var. brevifolia
                                               Hesperevax sparsiflora var. sparsiflora
                                     Hesperodoria
                                     Hesperomannia
                                             Hesperomannia arborescens
                                                   [Hesperomannia arborescens var. arborescens]
                                                   [Hesperomannia arborescens var. bushiana]
                                                   [Hesperomannia arborescens var. swezeyi]
                                             Hesperomannia arbuscula
                                                   [Hesperomannia arbuscula ssp. oahuensis]
                                                   [Hesperomannia arbuscula var. arbuscula]
                                                   [Hesperomannia arbuscula var. pearsallii]
                                                   [Hesperomannia mauiensis]
                                             Hesperomannia lydgatei
                                     Heteranthemis
                                             Heteranthemis viscidehirta
                                     Heteropappus
                                             Heteropappus altaicus
                                     Heterosperma
                                             Heterosperma pinnatum
                                     Heterospermum
                                             Heterospermum pinnatum
                                     Heterotheca
                                             Heterotheca adenolepis
                                             Heterotheca aspera
                                             Heterotheca barbata
                                                   [Chrysopsis barbata]
                                             Heterotheca bolanderi
                                             Heterotheca camphorata
                                             Heterotheca camporum
                                                   [Heterotheca camphorum]
                                               Heterotheca camporum var. camporum
                                                     [Chrysopsis camporum]
                                                     [Chrysopsis villosa var. camporum]
                                               Heterotheca camporum var. glandulissimum
                                                     [Chrysopsis camporum var. glandulissimum]
                                             Heterotheca canescens
                                                   [Chrysopsis berlandieri]
                                                   [Chrysopsis canescens]
                                                   [Chrysopsis villosa var. canescens]
                                             Heterotheca chrysopsides
                                             Heterotheca correllii
                                             Heterotheca cruiseana
                                             Heterotheca echioides
                                             Heterotheca falcata
                                             Heterotheca fastigata
                                             Heterotheca fastigiata
                                             Heterotheca feuxuosa
                                             Heterotheca flexuosa
                                             Heterotheca floridana
                                             Heterotheca foliosa
                                             Heterotheca fulcrata
                                                   [Chrysopsis fulcrata]
                                               Heterotheca fulcrata var. amplifolia
                                                     [Chrysopsis amplifolia]
                                                     [Chrysopsis caudata]
                                                     [Chrysopsis nitidula]
                                               Heterotheca fulcrata var. arizonica
                                               Heterotheca fulcrata var. fulcrata
                                                     [Chrysopsis cryptocephala]
                                                     [Chrysopsis resinolens]
                                               Heterotheca fulcrata var. senilis
                                                     [Chrysopsis senilis]
                                             Heterotheca gossypina
                                             Heterotheca graminiflora
                                             Heterotheca graminifolia
                                               Heterotheca graminifolia var. aspera
                                               Heterotheca graminifolia var. microcephala
                                               Heterotheca graminifolia var. tenuifolia
                                               Heterotheca graminifolia var. tracyi
                                             Heterotheca grandiflora
                                                   [Heterotheca floribunda]
                                             Heterotheca hyssopifolia
                                               Heterotheca hyssopifolia var. gigantea
                                             Heterotheca inuloides
                                               Heterotheca inuloides var. inuloides
                                               Heterotheca inuloides var. rosei
                                             Heterotheca jonesii
                                                   [Chrysopsis jonesii]
                                                   [Heterotheca jonesi]
                                             Heterotheca lamarckii
                                             Heterotheca latifolia
                                               Heterotheca latifolia var. arkansana
                                               Heterotheca latifolia var. macgregoris
                                             Heterotheca latisquamea
                                             Heterotheca leptoglossa
                                             Heterotheca marginata
                                             Heterotheca mariana
                                             Heterotheca microcephala
                                             Heterotheca monarchensis
                                             Heterotheca nervosa
                                               Heterotheca nervosa var. microcephala
                                             Heterotheca oligantha
                                             Heterotheca oregona
                                               Heterotheca oregona var. compacta
                                                     [Chrysopsis oregona var. compacta]
                                               Heterotheca oregona var. oregona
                                                     [Ammodia oregona]
                                                     [Chrysopsis oregona]
                                               Heterotheca oregona var. rudis
                                                     [Chrysopsis oregona var. rudis]
                                               Heterotheca oregona var. scaberrima
                                                     [Chrysopsis oregona var. scaberrima]
                                             Heterotheca pilosa
                                             Heterotheca pinifolia
                                             Heterotheca psammophila
                                             Heterotheca pumila
                                                   [Chrysopsis alpicola var. glomerata]
                                                   [Chrysopsis alpicola]
                                                   [Chrysopsis cooperi]
                                                   [Chrysopsis pumila]
                                                   [Chrysopsis villosa var. glomerata]
                                             Heterotheca ruthii
                                             Heterotheca rutteri
                                                   [Chrysopsis rutteri]
                                             Heterotheca scabiosaeus
                                             Heterotheca scabra
                                             Heterotheca scabrella
                                             Heterotheca sessiliflora
                                               Heterotheca sessiliflora ssp. bolanderi
                                                     [Chrysopsis bolanderi]
                                                     [Chrysopsis sessiliflora var. bolanderi]
                                                     [Chrysopsis villosa var. bolanderi]
                                               Heterotheca sessiliflora ssp. echioides
                                                     [Chrysopsis californica]
                                                     [Chrysopsis camphorata]
                                                     [Chrysopsis echioides]
                                                     [Chrysopsis sessiliflora var. echioides]
                                                     [Chrysopsis villosa var. camphorata]
                                                     [Chrysopsis villosa var. echioides]
                                               Heterotheca sessiliflora ssp. fastigiata
                                                     [Chrysopsis fastigiata]
                                                     [Chrysopsis villosa var. fastigiata]
                                               Heterotheca sessiliflora ssp. sessiliflora
                                                     [Chrysopsis sessiliflora]
                                                     [Chrysopsis villosa var. sessiliflora]
                                             Heterotheca shevockii
                                                   [Heterotheca villosa var. shevockii]
                                             Heterotheca stenophylla
                                               Heterotheca stenophylla var. angustifolia
                                                     [Chrysopsis angustifolia]
                                                     [Chrysopsis villosa var. angustifolia]
                                               Heterotheca stenophylla var. stenophylla
                                                     [Chrysopsis hispida var. stenophylla]
                                                     [Chrysopsis scabrifolia]
                                                     [Chrysopsis stenophylla]
                                                     [Chrysopsis villosa var. stenophylla]
                                             Heterotheca subaxillaris
                                                   [Heterotheca subaxillaris var. procumbens]
                                               Heterotheca subaxillaris ssp. latifolia
                                                     [Heterotheca subaxillaris var. latifolia]
                                                     [Heterotheca subaxillaris var. petiolaris]
                                                     [Heterotheca subaxillaris var. psammophila]
                                               Heterotheca subaxillaris ssp. subaxillaris
                                                     [Chrysopsis scabra]
                                                     [Heterotheca subaxillaris var. subaxillaris]
                                             Heterotheca subulata
                                             Heterotheca trichophylla
                                             Heterotheca villosa
                                               Heterotheca villosa var. angustifolia
                                               Heterotheca villosa var. ballardii
                                                     [Chrysopsis ballardii]
                                               Heterotheca villosa var. camporum
                                               Heterotheca villosa var. depressa
                                                     [Chrysopsis depressa]
                                                     [Heterotheca depressa]
                                               Heterotheca villosa var. foliosa
                                                     [Chrysopsis butleri]
                                                     [Chrysopsis foliosa]
                                                     [Chrysopsis imbricata]
                                                     [Chrysopsis villosa var. foliosa]
                                                     [Heterotheca foliosa]
                                               Heterotheca villosa var. hispida
                                               Heterotheca villosa var. minor
                                                     [Chrysopsis arida]
                                                     [Chrysopsis bakeri]
                                                     [Chrysopsis columbiana]
                                                     [Chrysopsis hirsutissima]
                                                     [Chrysopsis hispida]
                                                     [Chrysopsis villosa var. hispida]
                                                     [Chrysopsis wisconsinensis]
                                                     [Heterotheca villosa var. hispida]
                                                     [Heterotheca wisconsinensis]
                                               Heterotheca villosa var. nana
                                                     [Chrysopsis canescens var. nana]
                                                     [Chrysopsis horrida]
                                                     [Heterotheca horrida]
                                                     [Heterotheca villosa var. horrida]
                                               Heterotheca villosa var. pedunculata
                                                     [Chrysopsis pedunculata]
                                               Heterotheca villosa var. scabra
                                                     [Chrysopsis viscida ssp. cinerascens]
                                                     [Heterotheca horrida ssp. cinerascens]
                                               Heterotheca villosa var. sierrablancensis
                                               Heterotheca villosa var. var pedunculata (Greene) V. Harms e
                                               Heterotheca villosa var. villosa
                                                     [Chrysopsis mollis]
                                                     [Chrysopsis villosa]
                                             Heterotheca viscida
                                                   [Chrysopsis villosa var. viscida]
                                                   [Chrysopsis viscida]
                                             Heterotheca zionensis
                                     Hieracium
                                             Hieracium X alleghaniense
                                             Hieracium X atramentarium
                                             Hieracium X brachiatum
                                             Hieracium X fassettii
                                                   [Hieracium X fassettii var. fassettii]
                                                   [Hieracium X fassettii var. mendicum]
                                                   [Hieracium X fassettii var. wisconsinense]
                                             Hieracium X floribundum
                                                   [Hieracium X dorei]
                                                   [Hieracium auricula]
                                                   [Hieracium floribundum]
                                             Hieracium X fuscatrum
                                             Hieracium X grohii
                                             Hieracium abscissum
                                                   [Hieracium rusbyi]
                                             Hieracium albiflorum
                                                   [Chlorocrepis albiflora]
                                                   [Hieracium helleri]
                                             Hieracium alpinum
                                                   [Hieracium angmagssalikense]
                                             Hieracium argutum
                                                   [Hieracium argutum var. argutum]
                                                   [Hieracium argutum var. parishii]
                                             Hieracium atratum
                                             Hieracium aurantiacum
                                             Hieracium bolanderi
                                                   [Hieracium siskiyouense]
                                             Hieracium brevipilum
                                                   [Hieracium fendleri var. mogollense]
                                             Hieracium caespitosum
                                                   [Hieracium pratense]
                                             Hieracium canadense
                                             Hieracium carneum
                                             Hieracium crepidispermum
                                                   [Hieracium lemmonii]
                                             Hieracium dovrense
                                             Hieracium fassettii
                                             Hieracium fendleri
                                               Hieracium fendleri var. fendleri
                                                     [Hieracium fendleri var. discolor]
                                             Hieracium flagellare
                                                   [Hieracium X duplex]
                                                   [Hieracium X flagellare var. amauracron]
                                                   [Hieracium X flagellare var. cernuiforme]
                                                   [Hieracium X flagellare var. flagellare]
                                                   [Hieracium X flagellare var. glatzense]
                                                   [Hieracium X flagellare var. pilosius]
                                                   [Hieracium X flagellare]
                                                   [Hieracium X macrostolonum]
                                                   [Hieracium flagellare ssp. amauracron]
                                                   [Hieracium flagellare ssp. cernuiforme]
                                                   [Hieracium flagellare ssp. glatzense]
                                             Hieracium glomeratum
                                             Hieracium greenei
                                             Hieracium gronovii
                                                   [Hieracium gronovii var. foliosum]
                                             Hieracium horridum
                                             Hieracium inuloides
                                             Hieracium lactucella
                                             Hieracium longiberbe
                                             Hieracium longipilum
                                             Hieracium maculatum
                                             Hieracium marianum
                                                   [Hieracium X marianum]
                                                   [Hieracium pennsylvanicum]
                                             Hieracium megacephalum
                                                   [Hieracium argyraeum]
                                                   [Hieracium megacephalon]
                                             Hieracium murorum
                                                   [Hieracium hyparcticum]
                                                   [Hieracium lividorubens var. lividorubens]
                                                   [Hieracium lividorubens var. pseudostylum]
                                                   [Hieracium lividorubens var. subnudulum]
                                                   [Hieracium lividorubens]
                                                   [Hieracium stelechodes]
                                             Hieracium nudicaule
                                                   [Hieracium cynoglossoides var. nudicaule]
                                                   [Hieracium scouleri var. nudicaule]
                                             Hieracium paniculatum
                                             Hieracium parryi
                                             Hieracium pilosella
                                                   [Hieracium pilosella var. niveum]
                                                   [Hieracium pilosella var. pilosella]
                                             Hieracium piloselloides
                                                   [Hieracium florentinum]
                                                   [Hieracium praealtum var. decipiens]
                                                   [Hieracium praealtum var. praealtum]
                                                   [Hieracium praealtum]
                                             Hieracium plicatum
                                             Hieracium prenanthoides
                                             Hieracium pringlei
                                             Hieracium robinsonii
                                                   [Hieracium ungavense]
                                             Hieracium sabaudum
                                                   [Hieracium vagum]
                                             Hieracium scabrum
                                                   [Hieracium scabrum var. intonsum]
                                                   [Hieracium scabrum var. leucocaule]
                                                   [Hieracium scabrum var. scabrum]
                                                   [Hieracium scabrum var. tonsum]
                                             Hieracium schultzii
                                                   [Hieracium wrighti]
                                                   [Hieracium wrightii]
                                             Hieracium scouleri
                                                   [Hieracium albertinum]
                                                   [Hieracium chapacanum]
                                                   [Hieracium cusickii]
                                                   [Hieracium cynoglossoides]
                                                   [Hieracium flettii]
                                                   [Hieracium scouleri var. albertinum]
                                                   [Hieracium scouleri var. griseum]
                                                   [Hieracium scouleri var. scouleri]
                                             Hieracium scribneri
                                                   [Hieracium X scribneri]
                                             Hieracium stoloniferum
                                                   [Hieracium X stoloniflorum var. cayouetteanum]
                                                   [Hieracium X stoloniflorum var. laurentianum]
                                             Hieracium stoloniflorum
                                                   [Hieracium X stoloniflorum]
                                             Hieracium strictum
                                             Hieracium traillii
                                                   [Hieracium greenii]
                                             Hieracium tridentatum
                                             Hieracium trigonophorum
                                             Hieracium triste
                                                   [Chlorocrepis tristis]
                                                   [Hieracium gracile var. alaskanum]
                                                   [Hieracium gracile var. densifloccosum]
                                                   [Hieracium gracile var. detonsum]
                                                   [Hieracium gracile var. gracile]
                                                   [Hieracium gracile var. yukonense]
                                                   [Hieracium gracile]
                                                   [Hieracium triste ssp. gracile]
                                                   [Hieracium triste var. fulvum]
                                                   [Hieracium triste var. gracile]
                                                   [Hieracium triste var. triste]
                                                   [Hieracium triste var. tritiforme]
                                             Hieracium umbellatum
                                                   [Hieracium X dutillyanum]
                                                   [Hieracium X fernaldii]
                                                   [Hieracium acranthophorum var. acranthophorum]
                                                   [Hieracium acranthophorum var. isortoquense]
                                                   [Hieracium acranthophorum]
                                                   [Hieracium canadense var. canadense]
                                                   [Hieracium canadense var. divaricatum]
                                                   [Hieracium canadense var. fasciculatum]
                                                   [Hieracium canadense var. hirtirameum]
                                                   [Hieracium canadense var. kalmii]
                                                   [Hieracium canadense var. subintegrum]
                                                   [Hieracium devoldii]
                                                   [Hieracium eugenii]
                                                   [Hieracium kalmii var. canadense]
                                                   [Hieracium kalmii var. fasciculatum]
                                                   [Hieracium kalmii var. kalmii]
                                                   [Hieracium kalmii var. subintegrum]
                                                   [Hieracium kalmii]
                                                   [Hieracium laevigatum]
                                                   [Hieracium musartutense]
                                                   [Hieracium nepiocratum]
                                                   [Hieracium rigorosum var. nanusekense]
                                                   [Hieracium rigorosum var. rigorosum]
                                                   [Hieracium rigorosum var. sermilikense]
                                                   [Hieracium rigorosum var. unanakense]
                                                   [Hieracium rigorosum]
                                                   [Hieracium scabriusculum var. perhirsutum]
                                                   [Hieracium scabriusculum var. saximontanum]
                                                   [Hieracium scabriusculum var. scabrum]
                                                   [Hieracium scabriusculum]
                                                   [Hieracium stiptocaule]
                                                   [Hieracium umbellatum var. canadense]
                                                   [Hieracium umbellatum var. scabriusculum]
                                                   [Hieracium unbellatum]
                                             Hieracium venosum
                                                   [Hieracium venosum var. nudicaule]
                                                   [Hieracium venosum var. venosum]
                                             Hieracium vulgatum
                                                   [Hieracium acuminatum]
                                                   [Hieracium amitsokense]
                                                   [Hieracium groenlandicum]
                                                   [Hieracium ivigtutense]
                                                   [Hieracium lachenalii]
                                                   [Hieracium scholanderi]
                                                   [Hieracium sylowii var. norwagorum]
                                                   [Hieracium sylowii var. sylowii]
                                                   [Hieracium sylowii]
                                     Hofmeisteria
                                     Holocarpha
                                             Holocarpha heermannii
                                             Holocarpha macradenia
                                             Holocarpha obconica
                                                   [Holocarpha obconica ssp. autumnalis]
                                                   [Holocarpha obconica ssp. obconica]
                                                   [Holocarpha obconica var. autummalis]
                                             Holocarpha virgata
                                               Holocarpha virgata ssp. elongata
                                               Holocarpha virgata ssp. virgata
                                     Holozonia
                                             Holozonia filipes
                                     Hulsea
                                             Hulsea algida
                                                   [Hulsea caespitosa]
                                                   [Hulsea carnosa]
                                                   [Hulsea nevadensis]
                                             Hulsea brevifolia
                                             Hulsea californica
                                             Hulsea callicarpha
                                             Hulsea heterochroma
                                             Hulsea inyoensis
                                             Hulsea mexicana
                                             Hulsea nana
                                                   [Hulsea larsenii]
                                                   [Hulsea nana var. larsenii]
                                                   [Hulsea volcanica]
                                             Hulsea parryi
                                             Hulsea vestita
                                               Hulsea vestita ssp. callicarpha
                                                     [Hulsea vestita var. callicarpha]
                                               Hulsea vestita ssp. gabrielensis
                                               Hulsea vestita ssp. inyoensis
                                                     [Hulsea californica ssp. inyoensis]
                                               Hulsea vestita ssp. parryi
                                               Hulsea vestita ssp. pygmaea
                                                     [Hulsea vestita var. pygmaea]
                                               Hulsea vestita ssp. vestita
                                     Hulteniella
                                             Hulteniella integrifolia
                                                   [Arctanthemum integrifolium]
                                     Humbertacalia
                                           [Cacalia]
                                           [Koyamacalia]
                                     Hymenatherum
                                     Hymenoclea
                                             Hymenoclea sandersonii
                                     Hymenopappus
                                             Hymenopappus artemisiifolius
                                               Hymenopappus artemisiifolius var. artemisiifolius
                                                     [Hymenopappus scabiosaeus var. artemisiifolius]
                                               Hymenopappus artemisiifolius var. riograndensis
                                                     [Heterotheca scabiosaeus var. riograndensis]
                                                     [Hymenopappus scabiosaeus var. riograndensis]
                                             Hymenopappus biennis
                                             Hymenopappus carolinensis
                                             Hymenopappus carrizoanus
                                             Hymenopappus corymbosus
                                             Hymenopappus filifolius
                                               Hymenopappus filifolius var. cinereus
                                                     [Hymenopappus arenosus]
                                                     [Hymenopappus cinereus]
                                               Hymenopappus filifolius var. eriopodus
                                                     [Hymenopappus eriopodus]
                                               Hymenopappus filifolius var. filifolius
                                               Hymenopappus filifolius var. idahoensis
                                               Hymenopappus filifolius var. lugens
                                                     [Hymenopappus gloriosus]
                                                     [Hymenopappus lugens]
                                               Hymenopappus filifolius var. luteus
                                                     [Hymenopappus luteus]
                                               Hymenopappus filifolius var. megacephalus
                                               Hymenopappus filifolius var. nanus
                                               Hymenopappus filifolius var. nudipes
                                                     [Hymenopappus filifolius var. alpestris]
                                               Hymenopappus filifolius var. parvulus
                                               Hymenopappus filifolius var. pauciflorus
                                                     [Hymenopappus pauciflorus]
                                               Hymenopappus filifolius var. polycephalus
                                                     [Hymenopappus polycephalus]
                                               Hymenopappus filifolius var. tomentosus
                                             Hymenopappus flavescens
                                               Hymenopappus flavescens var. canotomentosus
                                                     [Hymenopappus robustus]
                                               Hymenopappus flavescens var. flavescens
                                             Hymenopappus flavomarginatus
                                             Hymenopappus mexicanus
                                             Hymenopappus newberryi
                                                   [Leucampyx newberryi]
                                             Hymenopappus radiatus
                                             Hymenopappus scabiosaeus
                                               Hymenopappus scabiosaeus var. corymbosus
                                               Hymenopappus scabiosaeus var. scabiosaeus
                                             Hymenopappus tenuifolius
                                     Hymenothrix
                                             Hymenothrix loomisii
                                             Hymenothrix wislizeni
                                                   [Hymenothrix wislizenii]
                                             Hymenothrix wrightii
                                     Hymenoxys
                                           [Dugaldia]
                                           [Macdougalia]
                                           [Plummera]
                                             Hymenoxys ambigens
                                               Hymenoxys ambigens var. ambigens
                                               Hymenoxys ambigens var. floribunda
                                               Hymenoxys ambigens var. neomexicana
                                             Hymenoxys anthemoides
                                             Hymenoxys bigelovii
                                                   [Macdougalia bigelovii]
                                             Hymenoxys brachyactis
                                             Hymenoxys brandegeei
                                             Hymenoxys cooperi
                                                   [Actinea canescens]
                                                   [Actinea cooperi]
                                                   [Hymenoxys cooperi var. canescens]
                                                   [Hymenoxys cooperi var. cooperi]
                                             Hymenoxys grandiflora
                                                   [Actinea grandiflora]
                                             Hymenoxys helenioides
                                             Hymenoxys hoopesii
                                             Hymenoxys jamesii
                                             Hymenoxys lemmonii
                                             Hymenoxys microcephala
                                             Hymenoxys odorata
                                             Hymenoxys olivacea
                                             Hymenoxys quinquesquamata
                                             Hymenoxys richardsonii
                                               Hymenoxys richardsonii var. floribunda
                                                     [Actinella richardsonii var. floribunda]
                                                     [Hymenoxys richardsonii var. utahensis]
                                               Hymenoxys richardsonii var. richardsonii
                                             Hymenoxys rusbyi
                                             Hymenoxys subintegra
                                                   [Hymenoxys subintegra var. utahensis]
                                             Hymenoxys texana
                                             Hymenoxys vaseyi
                                                   [Actinea vaseyi]
                                     Hyoseris
                                     Hypochaeris
                                           [Hypochoeris]
                                             Hypochaeris chillensis
                                                   [Hypochaeris brasiliensis var. brasiliensis]
                                                   [Hypochaeris brasiliensis var. tweediei]
                                                   [Hypochaeris brasiliensis var. tweedyi]
                                                   [Hypochaeris brasiliensis]
                                                   [Hypochaeris elata]
                                                   [Hypochaeris tweediei]
                                                   [Hypochaeris tweedyi]
                                             Hypochaeris glabra
                                             Hypochaeris microcephala
                                               Hypochaeris microcephala var. albiflora
                                               Hypochaeris microcephala var. microcephala
                                             Hypochaeris radicata
                                     Inula
                                             Inula britannica
                                                   [Inula brittanica]
                                             Inula gossypina
                                             Inula helenium
                                             Inula hookeri
                                             Inula salicina
                                     Ionactis
                                             Ionactis alpina
                                                   [Chrysopsis alpina]
                                             Ionactis caelestis
                                             Ionactis elegans
                                             Ionactis linariifolia
                                                   [Aster linariifolius var. linariifolius]
                                                   [Aster linariifolius var. victorinii]
                                                   [Ionactis linariifolius]
                                             Ionactis stenomeres
                                     Ismelia
                                             Ismelia carinata
                                                   [Glebionis carinatum]
                                     Isocarpha
                                             Isocarpha oppositifolia
                                                   [Calea oppositifolia]
                                               Isocarpha oppositifolia var. achyranthes
                                               Isocarpha oppositifolia var. oppositifolia
                                     Isocoma
                                             Isocoma acradenia
                                               Isocoma acradenia var. acradenia
                                                     [Haplopappus acradenius var. acradenius]
                                                     [Haplopappus acradenius]
                                                     [Isocoma acradenia ssp. acradenia]
                                               Isocoma acradenia var. bracteosa
                                                     [Haplopappus acradenius ssp. bracteosus]
                                               Isocoma acradenia var. eremophila
                                                     [Haplopappus acradenius ssp. eremophilus]
                                                     [Isocoma acradenia ssp. eremophila]
                                             Isocoma arguta
                                                   [Haplopappus venetus var. argutus]
                                             Isocoma azteca
                                             Isocoma bracteosa
                                             Isocoma coronopifolia
                                                   [Isocoma coronopifolia var. coronopifolia]
                                                   [Isocoma coronopifolia var. pedicellata]
                                                   [Isocoma pedicellata]
                                             Isocoma drummondii
                                                   [Haplopappus drummondii]
                                                   [Isocoma megalantha]
                                             Isocoma eremophila
                                             Isocoma humilis
                                                   [Haplopappus leverichii]
                                             Isocoma menziesii
                                               Isocoma menziesii var. decumbens
                                                     [Haplopappus venetus ssp. furfuraceus]
                                                     [Isocoma veneta var. furfuracea]
                                               Isocoma menziesii var. diabolica
                                               Isocoma menziesii var. menziesii
                                                     [Haplopappus venetus ssp. oxyphyllus]
                                                     [Isocoma veneta var. oxyphylla]
                                               Isocoma menziesii var. sedoides
                                                     [Haplopappus venetus var. sedoides]
                                                     [Isocoma veneta var. sedoides]
                                               Isocoma menziesii var. vernonioides
                                                     [Haplopappus venetus ssp. vernonioides]
                                                     [Isocoma veneta var. vernonioides]
                                             Isocoma oxyphylla
                                             Isocoma palmeri
                                             Isocoma pluriflora
                                                   [Haplopappus heterophyllus]
                                                   [Haplopappus pluriflorus]
                                                   [Isocoma wrightii]
                                             Isocoma reneta
                                             Isocoma rusbyi
                                                   [Haplopappus rusbyi]
                                             Isocoma tenuisecta
                                                   [Haplopappus tenuisectus]
                                             Isocoma veneta
                                                   [Haplopappus venetus var. venetus]
                                                   [Haplopappus venetus]
                                                   [Isocoma veneta var. veneta]
                                             Isocoma vernonioides
                                     Isopappus
                                             Isopappus hookerianus
                                             Isopappus validus
                                     Iva
                                             Iva ambrosiifolia
                                             Iva angustifolia
                                                   [Iva angustifolia var. latior]
                                                   [Iva texensis]
                                             Iva annua
                                                   [Iva annua var. annua]
                                                   [Iva annua var. caudata]
                                                   [Iva annua var. macrocarpa]
                                                   [Iva caudata]
                                                   [Iva ciliata var. macrocarpa]
                                                   [Iva ciliata]
                                             Iva asperifolia
                                             Iva axillaris
                                                   [Iva axillaris ssp. robustior]
                                                   [Iva axillaris var. axillaris]
                                                   [Iva axillaris var. robustior]
                                             Iva cheiranthifolia
                                             Iva dealbata
                                             Iva frutescens
                                                   [Iva frutescens ssp. frutescens]
                                                   [Iva frutescens ssp. oraria]
                                                   [Iva frutescens var. oraria]
                                             Iva hayesiana
                                             Iva imbricata
                                             Iva microcephala
                                             Iva nevadensis
                                     Ixeris
                                             Ixeris stolonifera
                                     Jacea
                                             Jacea pratensis
                                     Jacobaea
                                             Jacobaea aquatica
                                               Jacobaea aquatica var. aquatica
                                               Jacobaea aquatica var. erratica
                                             Jacobaea cannabifolia
                                             Jacobaea erucifolia
                                             Jacobaea maritima
                                                   [Senecio bicolor ssp. cineraria]
                                             Jacobaea vulgaris
                                     Jamesianthus
                                             Jamesianthus alabamensis
                                     Jaumea
                                             Jaumea carnosa
                                     Jefea
                                             Jefea brevifolia
                                                   [Zexmenia brevifolia]
                                     Jensia
                                             Jensia rammii
                                             Jensia yosemitana
                                     Kalimeris
                                             Kalimeris indica
                                             Kalimeris mongolica
                                     Keerlia
                                             Keerlia skirrhobasis
                                     Keysseria
                                           [Lagenifera]
                                             Keysseria erici
                                                   [Lagenifera erici]
                                             Keysseria helenae
                                                   [Lagenifera helenae]
                                             Keysseria maviensis
                                                   [Keysseria lavandula]
                                                   [Lagenifera maviensis]
                                                   [Lagenifera viridis]
                                                   [Lagenophora viridis]
                                     Kleinia
                                             Kleinia anteuphorbium
                                             Kleinia glandulosa
                                             Kleinia ruderalis
                                     Koanophyllon
                                             Koanophyllon celtidifolium
                                             Koanophyllon dolicholepis
                                             Koanophyllon droserolepis
                                             Koanophyllon palmeri
                                             Koanophyllon polyodon
                                             Koanophyllon solidaginifolium
                                             Koanophyllon tinctorium
                                                   [Koanophyllon plicatum]
                                             Koanophyllon villosum
                                     Krigia
                                             Krigia biflora
                                                   [Cynthia virginica]
                                                   [Cynthia viridis]
                                                   [Hyoseris biflora]
                                                   [Krigia amplexicaulis]
                                                   [Krigia biflora ssp. glandulifera]
                                                   [Krigia biflora var. biflora]
                                                   [Krigia biflora var. viridis]
                                             Krigia caespitosa
                                                   [Krigia cespitosa]
                                                   [Krigia oppositifolia]
                                                   [Serinia oppositifolia]
                                               Krigia caespitosa var. caespitosa
                                               Krigia caespitosa var. gracilis
                                             Krigia dandelion
                                                   [Cynthia dandelion]
                                             Krigia gracilis
                                             Krigia montana
                                                   [Cynthia montana]
                                             Krigia occidentalis
                                                   [Cymbia occidentalis]
                                             Krigia virginica
                                                   [Hyoseris virginica]
                                             Krigia wrightii
                                     Kyhosia
                                             Kyhosia bolanderi
                                     Lacinaria
                                     Lactuca
                                             Lactuca X morssii
                                             Lactuca biennis
                                                   [Lactuca spicata var. integrifolia]
                                                   [Lactuca spicata]
                                                   [Mulgedium spicatum var. integrifolium]
                                                   [Mulgedium spicatum]
                                             Lactuca canadensis
                                                   [Lactuca canadensis var. canadensis]
                                                   [Lactuca canadensis var. integrifolia]
                                                   [Lactuca canadensis var. latifolia]
                                                   [Lactuca canadensis var. longifolia]
                                                   [Lactuca canadensis var. obovata]
                                                   [Lactuca canadensis var. typica]
                                                   [Lactuca sagittifolia]
                                                   [Lactuca steelei]
                                             Lactuca floridana
                                                   [Lactuca floridana var. floridana]
                                                   [Lactuca floridana var. villosa]
                                                   [Lactuca villosa]
                                                   [Mulgedium floridanum]
                                                   [Mulgedium villosum]
                                             Lactuca graminifolia
                                                   [Lactuca graminifolia var. arizonica]
                                               Lactuca graminifolia var. graminifolia
                                             Lactuca hirsuta
                                                   [Lactuca hirsuta var. albiflora]
                                                   [Lactuca hirsuta var. hirsuta]
                                                   [Lactuca hirsuta var. sanguinea]
                                             Lactuca indica
                                             Lactuca intybacea
                                             Lactuca ludoviciana
                                                   [Lactuca campestris var. typica]
                                                   [Lactuca campestris]
                                             Lactuca muralis
                                             Lactuca oblongifolia
                                             Lactuca pulchell
                                             Lactuca pulchella
                                             Lactuca saligna
                                                   [Lactuca saligna var. runcinata]
                                             Lactuca sativa
                                             Lactuca serriola
                                                   [Lactuca scariola var. integrata]
                                                   [Lactuca scariola var. integrifolia]
                                                   [Lactuca scariola]
                                             Lactuca stolonifera
                                             Lactuca tatarica
                                               Lactuca tatarica ssp. pulchella
                                             Lactuca terrae-novae
                                             Lactuca virosa
                                     Laennecia
                                             Laennecia coulteri
                                                   [Eschenbachia coulteri]
                                             Laennecia eriophylla
                                             Laennecia filaginoides
                                             Laennecia schiedeana
                                                   [Leptilon integrifolium]
                                             Laennecia sophiifolia
                                                   [Eschenbachia tenuisecta]
                                             Laennecia turnerorum
                                     Lagascea
                                             Lagascea decipiens
                                             Lagascea mollis
                                                   [Nocca mollis]
                                     Lagenophora
                                     Lagophylla
                                             Lagophylla dichotoma
                                             Lagophylla glandulosa
                                                   [Lagophylla glandulosa ssp. glandulosa]
                                                   [Lagophylla glandulosa ssp. serrata]
                                             Lagophylla minor
                                             Lagophylla ramosissima
                                                   [Lagophylla congesta]
                                                   [Lagophylla ramosissima ssp. congesta]
                                                   [Lagophylla ramosissima ssp. ramosissima]
                                     Laphamia
                                             Laphamia bisetosa
                                             Laphamia gilensis
                                             Laphamia halimifolia
                                             Laphamia megalocephala
                                             Laphamia rotundata
                                             Laphamia rupestris
                                             Laphamia staurophylla
                                     Lappa
                                     Lapsana
                                             Lapsana apogonoides
                                             Lapsana communis
                                     Lapsanastrum
                                             Lapsanastrum apogonoides
                                     Lasallea
                                     Lasianthaea
                                             Lasianthaea podocephala
                                                   [Verbesina podocephala]
                                                   [Zexmenia podocephala]
                                     Lasiospermum
                                             Lasiospermum bipinnatum
                                                   [Lasiospermum radiatum]
                                                   [Lidbeckia bipinnata]
                                     Lasthenia
                                             Lasthenia burkei
                                             Lasthenia californica
                                               Lasthenia californica ssp. bakeri
                                                     [Baeria macrantha var. bakeri]
                                                     [Lasthenia macrantha ssp. bakeri]
                                               Lasthenia californica ssp. californica
                                                     [Baeria chrysostoma ssp. gracilis]
                                                     [Baeria chrysostoma ssp. hirsutula]
                                                     [Baeria chrysostoma var. gracilis]
                                               Lasthenia californica ssp. macrantha
                                                     [Baeria macrantha var. pauciaristata]
                                                     [Baeria macrantha var. thalassophila]
                                                     [Lasthenia macrantha ssp. macrantha]
                                                     [Lasthenia macrantha ssp. prisca]
                                             Lasthenia chrysantha
                                                   [Crockeria chrysantha]
                                             Lasthenia chrysostoma
                                             Lasthenia conjugens
                                                   [Baeria fremontii var. conjugens]
                                             Lasthenia coronaria
                                                   [Baeria californica]
                                             Lasthenia debilis
                                                   [Baeria debilis]
                                             Lasthenia ferrisiae
                                             Lasthenia fremontii
                                                   [Baeria fremontii var. heterochaeta]
                                                   [Baeria fremontii]
                                             Lasthenia glaberrima
                                             Lasthenia glabrata
                                               Lasthenia glabrata ssp. coulteri
                                                     [Lasthenia glabrata var. coulteri]
                                               Lasthenia glabrata ssp. glabrata
                                             Lasthenia gracilis
                                             Lasthenia leptalea
                                                   [Baeria leptalea]
                                             Lasthenia macrantha
                                             Lasthenia maritima
                                                   [Baeria maritima]
                                                   [Baeria minor ssp. maritima]
                                                   [Lasthenia minor ssp. maritima]
                                                   [Lasthenia minor var. maritima]
                                             Lasthenia microglossa
                                                   [Baeria microglossa]
                                             Lasthenia minor
                                                   [Baeria minor]
                                                   [Baeria uliginosa]
                                                   [Lasthenia minor var. minor]
                                             Lasthenia ornduffii
                                             Lasthenia platycarpha
                                                   [Baeria platycarpha]
                                     Launaea
                                             Launaea cornuta
                                             Launaea intybacea
                                                   [Bracyrhamphus intybaceus]
                                     Layia
                                             Layia carnosa
                                             Layia chrysanthemoides
                                                   [Layia chrysanthemoides ssp. chrysanthemoides]
                                                   [Layia chrysanthemoides ssp. maritima]
                                             Layia discoidea
                                             Layia fremontii
                                             Layia gaillardioides
                                             Layia glandulosa
                                                   [Layia glandulosa ssp. glandulosa]
                                                   [Layia glandulosa ssp. lutea]
                                             Layia heterotricha
                                             Layia hieracioides
                                                   [Layia paniculata]
                                             Layia jonesii
                                             Layia leucopappa
                                             Layia munzii
                                             Layia pentachaeta
                                               Layia pentachaeta ssp. albida
                                               Layia pentachaeta ssp. pentachaeta
                                             Layia platyglossa
                                                   [Layia platyglossa ssp. campestris]
                                                   [Layia platyglossa ssp. platyglossa]
                                                   [Layia platyglossa var. breviseta]
                                                   [Layia ziegleri]
                                             Layia septentrionalis
                                     Leibnitzia
                                             Leibnitzia lyrata
                                                   [Chaptalia alsophila]
                                                   [Chaptalia leucocephala]
                                                   [Chaptalia seemannii]
                                                   [Leibnitzia seemannii]
                                     Leiodon
                                     Leontodon
                                             Leontodon autumnalis
                                                   [Apargia autumnalis]
                                                   [Leontodon autumnalis ssp. autumnalis]
                                                   [Leontodon autumnalis ssp. pratensis]
                                                   [Leontodon autumnalis var. pratensis]
                                             Leontodon hispidus
                                                   [Apargia hispida]
                                                   [Leontodon danubialis]
                                                   [Leontodon hastilis var. glabratus]
                                                   [Leontodon hastilis var. vulgaris]
                                                   [Leontodon hastilis]
                                                   [Leontodon hirtus]
                                                   [Leontodon hispidus ssp. danubialis]
                                                   [Leontodon hispidus ssp. hispidus]
                                                   [Leontodon hispidus var. glabratus]
                                             Leontodon leysseri
                                             Leontodon muelleri
                                             Leontodon nudicaulis
                                             Leontodon saxatilis
                                               Leontodon saxatilis ssp. longirostris
                                               Leontodon saxatilis ssp. saxatilis
                                                     [Leontodon nudicaulis ssp. taraxacoides]
                                                     [Leontodon taraxacoides ssp. taraxacoides]
                                     Lepachys
                                     Lepidanthus
                                     Lepidaploa
                                             Lepidaploa borinquensis
                                             Lepidaploa glabra
                                             Lepidaploa proctorii
                                             Lepidaploa remotiflora
                                             Lepidaploa sericea
                                     Lepidospartum
                                             Lepidospartum burgessii
                                             Lepidospartum latisquamum
                                             Lepidospartum squamatum
                                                   [Lepidospartum squamatum var. palmeri]
                                     Lepidotheca
                                             Lepidotheca suaveolens
                                     Leptilon
                                     Leptopoda
                                     Leptoseris
                                     Leptosyne
                                     Lessingia
                                             Lessingia arachnoidea
                                                   [Lessingia hololeuca var. arachnoidea]
                                                   [Lessingia micradenia var. arachnoidea]
                                             Lessingia germanorum
                                                   [Lessingia germanorum var. germanorum]
                                             Lessingia glandulifera
                                               Lessingia glandulifera var. glandulifera
                                                     [Lessingia germanorum var. glandulifera]
                                                     [Lessingia germanorum var. lemmonii]
                                                     [Lessingia germanorum var. ramulosissima]
                                                     [Lessingia lemmonii var. lemmonii]
                                                     [Lessingia lemmonii var. ramulosissima]
                                               Lessingia glandulifera var. peirsonii
                                                     [Lessingia germanorum var. peirsonii]
                                                     [Lessingia lemmonii var. peirsonii]
                                               Lessingia glandulifera var. tomentosa
                                                     [Lessingia germanorum var. tomentosa]
                                             Lessingia hololeuca
                                                   [Lessingia hololeuca var. hololeuca]
                                             Lessingia lemmonii
                                             Lessingia leptoclada
                                             Lessingia micradenia
                                               Lessingia micradenia var. glabrata
                                                     [Lessingia ramulosa var. glabrata]
                                               Lessingia micradenia var. micradenia
                                                     [Lessingia ramulosa var. micradenia]
                                             Lessingia nana
                                             Lessingia nemaclada
                                                   [Lessingia nemaclada var. albiflora]
                                                   [Lessingia nemaclada var. mendocina]
                                                   [Lessingia nemaclada var. nemaclada]
                                             Lessingia pectinata
                                                   [Lessingia germanorum var. pectinata]
                                                   [Lessingia glandulifera var. pectinata]
                                               Lessingia pectinata var. pectinata
                                               Lessingia pectinata var. tenuipes
                                             Lessingia ramulosa
                                                   [Lessingia ramulosa var. adenophora]
                                                   [Lessingia ramulosa var. ramulosa]
                                             Lessingia tenuis
                                                   [Lessingia germanorum var. parvula]
                                                   [Lessingia germanorum var. tenuis]
                                             Lessingia virgata
                                                   [Lessingia virgata var. glomerata]
                                                   [Lessingia virgata var. virgata]
                                     Leucacantha
                                             Leucacantha cyanus
                                     Leucampyx
                                     Leucantha
                                             Leucantha solstitialis
                                     Leucanthemella
                                             Leucanthemella serotina
                                     Leucanthemopsis
                                             Leucanthemopsis alpina
                                     Leucanthemum
                                             Leucanthemum X superbum
                                                   [Chrysanthemum X superbum]
                                             Leucanthemum arcticum
                                             Leucanthemum integrifolium
                                             Leucanthemum lacustre
                                                   [Chrysanthemum lacustre]
                                             Leucanthemum maximum
                                                   [Chrysanthemum maximum]
                                             Leucanthemum nipponicum
                                             Leucanthemum serotinum
                                             Leucanthemum vulgare
                                                   [Chrysanthemum ircutiana]
                                                   [Chrysanthemum leucanthemum var. boecheri]
                                                   [Chrysanthemum leucanthemum var. pinnatifidum]
                                                   [Chrysanthemum leucanthemum]
                                                   [Leucanthemum ircutianum]
                                                   [Leucanthemum leucanthemum]
                                                   [Leucanthemum praecox]
                                                   [Leucanthemum vulgare ssp. ircutianum]
                                                   [Leucanthemum vulgare var. pinnatifidum]
                                     Leucelene
                                             Leucelene ericoides
                                     Leuciva
                                             Leuciva dealbata
                                     Leucopsidium
                                             Leucopsidium humile
                                     Leucosyris
                                     Liatris
                                             Liatris X boykinii
                                                   [Lacinaria boykinii]
                                             Liatris X creditonensis
                                             Liatris X deamii
                                             Liatris X fallacior
                                             Liatris X freemaniana
                                             Liatris X frostii
                                                   [Liatris froslii]
                                             Liatris X gladewitzii
                                             Liatris X macdanieliana
                                             Liatris X nieuwlandii
                                             Liatris X ridgwayi
                                             Liatris X spheroidea
                                                   [Lacinaria aspera var. spheroidea]
                                                   [Liatris spheroidea]
                                             Liatris X steelei
                                             Liatris X weaveri
                                             Liatris acidota
                                                   [Lacinaria acidota]
                                             Liatris aestivalis
                                             Liatris aspera
                                                   [Lacinaria aspera]
                                                   [Lacinaria squarrosa var. intermedia]
                                                   [Liatris aspera var. aspera]
                                                   [Liatris aspera var. intermedia]
                                                   [Liatris aspera var. salutans]
                                             Liatris bebbiana
                                             Liatris borealis
                                             Liatris bracteata
                                             Liatris chapmanii
                                                   [Lacinaria chapmanii]
                                             Liatris cokeri
                                             Liatris compacta
                                                   [Liatris squarrosa var. compacta]
                                             Liatris cylindracea
                                                   [Lacinaria cylindracea]
                                             Liatris cymosa
                                             Liatris elegans
                                               Liatris elegans var. bridgesii
                                               Liatris elegans var. carizzana
                                               Liatris elegans var. elegans
                                                     [Lacinaria elegans]
                                                     [Lacinaria flabellata]
                                                     [Liatris elegans var. flabellata]
                                               Liatris elegans var. kralii
                                             Liatris elegantula
                                                   [Lacinaria elegantula]
                                                   [Liatris graminifolia var. elegantula]
                                                   [Liatris pilosa var. elegantula]
                                             Liatris garberi
                                                   [Lacinaria chlorolepis]
                                                   [Lacinaria garberi]
                                                   [Lacinaria nashii]
                                             Liatris gholsonii
                                             Liatris glandulosa
                                             Liatris gracilis
                                                   [Lacinaria gracilis]
                                                   [Lacinaria laxa]
                                             Liatris helleri
                                                   [Lacinaria helleri]
                                                   [Liatris turgida]
                                             Liatris hirsuta
                                                   [Liatris squarrosa var. hirsuta]
                                             Liatris laevigata
                                                   [Liatris tenuifolia var. laevigata]
                                                   [Liatris tenuifolia var. quadriflora]
                                             Liatris lancifolia
                                                   [Lacinaria lancifolia]
                                                   [Liatris kansana]
                                             Liatris ligulistylis
                                                   [Lacinaria ligulistylis]
                                             Liatris microcephala
                                                   [Lacinaria microcephala]
                                             Liatris novae-angliae
                                             Liatris ohlingerae
                                                   [Ammopursus ohlingerae]
                                             Liatris oligocephala
                                             Liatris patens
                                             Liatris pauciflora
                                               Liatris pauciflora var. pauciflora
                                                     [Lacinaria pauciflora]
                                               Liatris pauciflora var. secunda
                                                     [Lacinaria secunda]
                                             Liatris pilosa
                                                   [Lacinaria graminifolia]
                                                   [Liatris graminifolia var. dubia]
                                                   [Liatris graminifolia var. graminifolia]
                                                   [Liatris graminifolia var. lasia]
                                                   [Liatris graminifolia]
                                                   [Liatris pilosa var. lasia]
                                                   [Liatris pilosa var. pilosa]
                                             Liatris provincialis
                                             Liatris punctata
                                               Liatris punctata var. mexicana
                                               Liatris punctata var. mucronata
                                                     [Liatris angustifolia]
                                                     [Liatris densispicata var. interrupta]
                                                     [Liatris mucronata]
                                               Liatris punctata var. punctata
                                                     [Lacinaria punctata]
                                                     [Liatris densispicata var. densispicata]
                                                     [Liatris densispicata]
                                                     [Liatris punctata var. nebraskana]
                                                     [Liatris punctata var. typica]
                                             Liatris pycnostachya
                                               Liatris pycnostachya var. lasiophylla
                                               Liatris pycnostachya var. pycnostachya
                                                     [Lacinaria pycnostachya]
                                             Liatris savannensis
                                             Liatris scariosa
                                               Liatris scariosa var. nieuwlandii
                                                     [Lacinaria scariosa var. nieuwlandii]
                                                     [Liatris novae-angliae var. nieuwlandii]
                                               Liatris scariosa var. novae-angliae
                                               Liatris scariosa var. scariosa
                                                     [Lacinaria scariosa]
                                                     [Liatris scariosa var. virginiana]
                                             Liatris secunda
                                             Liatris spicata
                                               Liatris spicata var. resinosa
                                               Liatris spicata var. spicata
                                                     [Lacinaria spicata]
                                             Liatris squarrosa
                                               Liatris squarrosa var. glabrata
                                                     [Liatris glabrata]
                                               Liatris squarrosa var. squarrosa
                                                     [Lacinaria squarrosa]
                                                     [Liatris glabrata var. alabamensis]
                                                     [Liatris squarrosa var. alabamensis]
                                                     [Liatris squarrosa var. gracilenta]
                                             Liatris squarrulosa
                                                   [Lacinaria ruthii]
                                                   [Lacinaria shortii]
                                                   [Lacinaria tracyi]
                                                   [Liatris earlei]
                                                   [Liatris scabra]
                                                   [Liatris scariosa var. squarrulosa]
                                             Liatris tenuifolia
                                               Liatris tenuifolia var. tenuifolia
                                                     [Lacinaria tenuifolia]
                                             Liatris tenuis
                                             Liatris virgata
                                                   [Lacinaria regimontis]
                                                   [Lacinaria smallii]
                                                   [Liatris graminifolia var. racemosa]
                                                   [Liatris graminifolia var. smallii]
                                                   [Liatris graminifolia var. virgata]
                                                   [Liatris regiomontis]
                                                   [Liatris spicata var. racemosa]
                                     Lidbeckia
                                     Ligularia
                                             Ligularia amplectens
                                               Ligularia amplectens var. holmii
                                             Ligularia bigelovii
                                               Ligularia bigelovii var. hallii
                                             Ligularia dentata
                                                   [Ligularia clivorum]
                                                   [Senecio clivorum]
                                             Ligularia holmii
                                             Ligularia porteri
                                             Ligularia pudica
                                             Ligularia soldanella
                                             Ligularia taraxacoides
                                     Lindheimera
                                             Lindheimera texana
                                     Linosyris
                                     Lipochaeta
                                             Lipochaeta X procumbens
                                             Lipochaeta acris
                                             Lipochaeta alata
                                             Lipochaeta calycosa
                                             Lipochaeta christophersenii
                                             Lipochaeta connata
                                               Lipochaeta connata var. acris
                                                     [Lipochaeta connata var. lata]
                                                     [Lipochaeta lobata var. incisior]
                                               Lipochaeta connata var. connata
                                                     [Lipochaeta alata var. acrior]
                                                     [Lipochaeta alata var. pulchrior]
                                                     [Lipochaeta profusa var. robustior]
                                             Lipochaeta degeneri
                                             Lipochaeta exigua
                                             Lipochaeta garberi
                                             Lipochaeta heterophylla
                                                   [Lipochaeta hastata]
                                                   [Lipochaeta heterophylla var. molokaiensis]
                                             Lipochaeta kaenaensis
                                             Lipochaeta lobata
                                               Lipochaeta lobata var. leptophylla
                                               Lipochaeta lobata var. lobata
                                                     [Lipochaeta lobata var. albescens]
                                                     [Lipochaeta lobata var. aprevalliana]
                                                     [Lipochaeta lobata var. denticulata]
                                                     [Lipochaeta lobata var. grossedentata]
                                                     [Lipochaeta lobata var. hastulata]
                                                     [Lipochaeta lobata var. hastulatoides]
                                                     [Lipochaeta lobata var. hosakae]
                                             Lipochaeta micrantha
                                             Lipochaeta niihauensis
                                             Lipochaeta profusa
                                             Lipochaeta rockii
                                                   [Lipochaeta elliptica]
                                                   [Lipochaeta forbesii var. sherffii]
                                                   [Lipochaeta forbesii]
                                                   [Lipochaeta heterophylla var. malvacea]
                                                   [Lipochaeta kahoolawensis]
                                                   [Lipochaeta lobata var. makenensis]
                                                   [Lipochaeta lobata var. maunaloensis]
                                                   [Lipochaeta mauiensis]
                                                   [Lipochaeta nesophila]
                                                   [Lipochaeta rockii var. dissecta]
                                                   [Lipochaeta rockii var. parva]
                                                   [Lipochaeta rockii var. subovata]
                                                   [Lipochaeta scabra]
                                                   [Lipochaeta succulenta var. trifida]
                                             Lipochaeta succulenta
                                                   [Lipochaeta connata var. decurrens]
                                                   [Lipochaeta connata var. littoralis]
                                                   [Lipochaeta lanceolata]
                                                   [Lipochaeta robusta]
                                                   [Lipochaeta succulenta var. angustata]
                                                   [Lipochaeta succulenta var. barclayi]
                                                   [Lipochaeta succulenta var. decurrens]
                                                   [Lipochaeta variolosa]
                                             Lipochaeta trilobata
                                             Lipochaeta vittata
                                     Logfia
                                             Logfia arizonica
                                                   [Filago arizonica]
                                                   [Oglifa arizonica]
                                             Logfia arvensis
                                                   [Filago arvensis]
                                                   [Oglifa arvensis]
                                             Logfia depressa
                                                   [Filago depressa]
                                                   [Oglifa depressa]
                                             Logfia filaginoides
                                                   [Filago californica]
                                                   [Logfia californica]
                                                   [Oglifa californica]
                                             Logfia gallica
                                                   [Filago gallica]
                                                   [Oglifa gallica]
                                             Logfia minima
                                                   [Filago minima]
                                                   [Oglifa minima]
                                     Lorandersonia
                                             Lorandersonia baileyi
                                                   [Chrysothamnus pulchellus var. baileyi]
                                                   [Ericameria pulchella ssp. baileyi]
                                             Lorandersonia linifolia
                                             Lorandersonia microcephala
                                                   [Haplopappus microcephalus]
                                             Lorandersonia peirsonii
                                                   [Haplopappus eximius ssp. peirsonii]
                                                   [Haplopappus peirsonii]
                                             Lorandersonia pulchella
                                                   [Chrysothamnus pulchellus ssp. elatior]
                                                   [Chrysothamnus pulchellus ssp. pulchellus]
                                                   [Ericameria pulchella var. elatior]
                                             Lorandersonia salicina
                                                   [Haplopappus salicinus]
                                                   [Hesperodoria salicina]
                                             Lorandersonia spathulata
                                     Lowellia
                                     Luina
                                             Luina hypoleuca
                                             Luina serpentina
                                     Luteidiscus
                                             Luteidiscus calcisabulorus
                                             Luteidiscus rockii
                                     Lygodesmia
                                           [Lygodesma]
                                             Lygodesmia aphylla
                                                   [Lygodesma aphylla]
                                             Lygodesmia arizonica
                                             Lygodesmia doloresensis
                                             Lygodesmia grandiflora
                                                   [Erythremia grandiflora]
                                                   [Lygodesma grandiflora]
                                               Lygodesmia grandiflora var. arizonica
                                                     [Lygodesma arizonica]
                                                     [Lygodesmia arizonica]
                                               Lygodesmia grandiflora var. dianthopsis
                                                     [Lygodesma dianthopsis]
                                                     [Lygodesmia dianthopsis]
                                               Lygodesmia grandiflora var. doloresensis
                                                     [Lygodesmia doloresensis]
                                               Lygodesmia grandiflora var. entrada
                                                     [Lygodesmia entrada]
                                               Lygodesmia grandiflora var. grandiflora
                                                     [Lygodesmia grandiflora var. stricta]
                                             Lygodesmia juncea
                                                   [Lygodesma juncea]
                                             Lygodesmia ramosissima
                                             Lygodesmia spinosa
                                             Lygodesmia texana
                                                   [Lygodesmia aphylla var. texana]
                                     Machaeranthera
                                             Machaeranthera ammophila
                                             Machaeranthera amophila
                                             Machaeranthera amplifolia
                                             Machaeranthera aquifolia
                                             Machaeranthera arida
                                             Machaeranthera arizonica
                                             Machaeranthera asteroides
                                               Machaeranthera asteroides var. glandulosa
                                               Machaeranthera asteroides var. lagunensis
                                             Machaeranthera attenuata
                                             Machaeranthera australis
                                             Machaeranthera bigelovii
                                               Machaeranthera bigelovii var. bigelovii
                                               Machaeranthera bigelovii var. commixta
                                               Machaeranthera bigelovii var. mucronata
                                             Machaeranthera blephariphylla
                                             Machaeranthera boltoniae
                                             Machaeranthera breviligulata
                                             Machaeranthera brevilingulata
                                             Machaeranthera canescens
                                               Machaeranthera canescens ssp. canescens
                                               Machaeranthera canescens ssp. glabra
                                               Machaeranthera canescens ssp. ziegleri
                                               Machaeranthera canescens var. ambigua
                                               Machaeranthera canescens var. aristata
                                               Machaeranthera canescens var. canescens
                                               Machaeranthera canescens var. commixta
                                               Machaeranthera canescens var. glabra
                                               Machaeranthera canescens var. monticola
                                               Machaeranthera canescens var. tephrodes
                                               Machaeranthera canescens var. vacans
                                               Machaeranthera canescens var. viridis
                                               Machaeranthera canescens var. viscosa
                                             Machaeranthera carnosa
                                             Machaeranthera centaureoides
                                             Machaeranthera cichoriacea
                                             Machaeranthera coloradoënsis
                                               Machaeranthera coloradoensis var. brandegeei
                                               Machaeranthera coloradoënsis var. brandegei
                                               Machaeranthera coloradoënsis var. coloradoënsis
                                             Machaeranthera commixta
                                             Machaeranthera correllii
                                             Machaeranthera coulteri
                                             Machaeranthera divaricata
                                             Machaeranthera eradiata
                                             Machaeranthera fremontii
                                             Machaeranthera glabella
                                             Machaeranthera gracilis
                                             Machaeranthera grindelioides
                                               Machaeranthera grindelioides var. depressa
                                               Machaeranthera grindelioides var. grindelioides
                                             Machaeranthera gymnocephala
                                             Machaeranthera gypsitherma
                                             Machaeranthera gypsophila
                                             Machaeranthera hansonii
                                             Machaeranthera harvardii
                                             Machaeranthera havardii
                                             Machaeranthera heterocarpa
                                             Machaeranthera hiemalis
                                             Machaeranthera incana
                                             Machaeranthera inops
                                               Machaeranthera inops var. atrata
                                             Machaeranthera inornata
                                             Machaeranthera juncea
                                             Machaeranthera laetevirens
                                             Machaeranthera laevis
                                             Machaeranthera lagunensis
                                             Machaeranthera latifolia
                                             Machaeranthera leptophylla
                                             Machaeranthera leucanthemifolia
                                             Machaeranthera magna
                                             Machaeranthera mexicana
                                             Machaeranthera montana
                                             Machaeranthera mucronata
                                             Machaeranthera oxylepis
                                             Machaeranthera paniculata
                                             Machaeranthera parviflora
                                             Machaeranthera pattersonii
                                             Machaeranthera phyllocephala
                                             Machaeranthera pinnata
                                             Machaeranthera pinnatifida
                                               Machaeranthera pinnatifida ssp. gooddingii
                                               Machaeranthera pinnatifida ssp. pinnatifida
                                               Machaeranthera pinnatifida var. glaberrima
                                               Machaeranthera pinnatifida var. paradoxa
                                               Machaeranthera pinnatifida var. pinnatifida
                                               Machaeranthera pinnatifida var. scabrella
                                             Machaeranthera pinosa
                                             Machaeranthera pruinosa
                                             Machaeranthera pulverulenta
                                               Machaeranthera pulverulenta var. vacans
                                             Machaeranthera pygmaea
                                             Machaeranthera ramosa
                                             Machaeranthera rigida
                                             Machaeranthera riparia
                                             Machaeranthera rubricaulis
                                             Machaeranthera scabrella
                                             Machaeranthera scoparia
                                             Machaeranthera selbyi
                                             Machaeranthera sessiliflora
                                             Machaeranthera shastensis
                                               Machaeranthera shastensis var. eradiata
                                               Machaeranthera shastensis var. glossophylla
                                               Machaeranthera shastensis var. latifolia
                                               Machaeranthera shastensis var. montana
                                             Machaeranthera simplex
                                             Machaeranthera sonorae
                                             Machaeranthera sp.
                                             Machaeranthera spinulosa
                                             Machaeranthera subalpina
                                             Machaeranthera superba
                                             Machaeranthera tagetina
                                                   [Aster tagetinus]
                                             Machaeranthera tanacetifolia
                                                   [Aster tanacetifolius]
                                                   [Machaeranthera coronopifolia]
                                                   [Machaeranthera parthenium]
                                             Machaeranthera tenuis
                                             Machaeranthera tephrodes
                                             Machaeranthera texensis
                                             Machaeranthera tortifolia
                                             Machaeranthera verna
                                             Machaeranthera viscida
                                             Machaeranthera viscosa
                                     Macronema
                                             Macronema aberrans
                                             Macronema discoideum
                                     Macrorhynchus
                                             Macrorhynchus glaucus
                                     Madia
                                             Madia anomala
                                             Madia bolanderi
                                             Madia citrigracilis
                                             Madia citriodora
                                             Madia doris-nilesiae
                                             Madia elegans
                                                   [Madia elegans ssp. densifolia]
                                                   [Madia elegans ssp. elegans]
                                                   [Madia elegans ssp. vernalis]
                                                   [Madia elegans ssp. wheeleri]
                                                   [Madia elegans var. densifolia]
                                             Madia exigua
                                             Madia glomerata
                                             Madia gracilis
                                                   [Madia dissitiflora]
                                                   [Madia gracilis ssp. collina]
                                                   [Madia gracilis ssp. gracilis]
                                                   [Madia gracilis ssp. pilosa]
                                             Madia hallii
                                             Madia madioides
                                             Madia minima
                                             Madia nutans
                                             Madia radiata
                                             Madia rammii
                                             Madia sativa
                                                   [Madia capitata]
                                                   [Madia sativa ssp. capitata]
                                                   [Madia sativa var. congesta]
                                             Madia stebbinsii
                                             Madia subspicata
                                             Madia yosemitana
                                     Malacothrix
                                             Malacothrix altissima
                                             Malacothrix arachnoidea
                                             Malacothrix blairii
                                             Malacothrix californica
                                             Malacothrix clevelandii
                                                   [Malacothrix senecioides]
                                             Malacothrix coulteri
                                                   [Malacothrix coulteri var. cognata]
                                                   [Zollikoferia elquiensis]
                                             Malacothrix crispifolia
                                             Malacothrix fendleri
                                             Malacothrix floccifera
                                                   [Malacothrix obtusa]
                                                   [Malacothrix parviflora]
                                                   [Senecio flocciferus]
                                             Malacothrix foliosa
                                               Malacothrix foliosa ssp. crispifolia
                                               Malacothrix foliosa ssp. foliosa
                                               Malacothrix foliosa ssp. philbrickii
                                               Malacothrix foliosa ssp. polycephala
                                             Malacothrix glabrata
                                                   [Malacothrix californica var. glabrata]
                                             Malacothrix implicata
                                             Malacothrix incana
                                                   [Malacothrix incana var. succulenta]
                                                   [Malacothrix succulenta]
                                             Malacothrix indecora
                                                   [Malacothrix foliosa var. indecora]
                                             Malacothrix insularis
                                             Malacothrix junakii
                                                   [Malacothrix intermedia]
                                             Malacothrix phaeocarpa
                                             Malacothrix platyphylla
                                             Malacothrix polycephala
                                             Malacothrix saxatilis
                                               Malacothrix saxatilis var. arachnoidea
                                               Malacothrix saxatilis var. commutata
                                               Malacothrix saxatilis var. implicata
                                               Malacothrix saxatilis var. saxatilis
                                               Malacothrix saxatilis var. tenuifolia
                                                     [Malacothrix saxatilis var. altissima]
                                                     [Malacothrix saxatilis var. tenuissima]
                                             Malacothrix similis
                                             Malacothrix sonchoides
                                                   [Leptoseris sonchoides]
                                             Malacothrix sonorae
                                             Malacothrix squalida
                                                   [Malacothrix foliosa var. squalida]
                                                   [Malacothrix insularis var. squalida]
                                             Malacothrix stebbinsii
                                                   [Malacothrix clevelandii var. stebbinsii]
                                             Malacothrix tenuifolia
                                             Malacothrix torreyi
                                                   [Malacothrix sonchoides var. torreyi]
                                             Malacothrix xanthii
                                     Malperia
                                             Malperia tenuis
                                     Mantisalca
                                             Mantisalca salmantica
                                     Mariana
                                     Marshallia
                                             Marshallia caespitosa
                                                   [Marshallia caespitosa var. caespitosa]
                                                   [Marshallia caespitosa var. signata]
                                             Marshallia graminifolia
                                                   [Marshallia graminifolia ssp. tenuifolia]
                                                   [Marshallia graminifolia var. cynanthera]
                                                   [Marshallia graminifolia var. graminifolia]
                                                   [Marshallia graminifolia var. tenuifolia]
                                                   [Marshallia laciniarioides]
                                                   [Marshallia tenuifolia var. graminifolia]
                                                   [Marshallia tenuifolia]
                                                   [Marshallia williamsonii]
                                             Marshallia grandiflora
                                             Marshallia mohrii
                                             Marshallia obovata
                                                   [Marshallia obovata var. obovata]
                                                   [Marshallia obovata var. platyphylla]
                                                   [Marshallia obovata var. scaposa]
                                             Marshallia ramosa
                                             Marshallia trinervia
                                     Maruta
                                     Matricaria
                                           [Chamomilla]
                                             Matricaria ambigua
                                             Matricaria chamomilla
                                                   [Chamomilla chamomilla]
                                                   [Chamomilla recutita]
                                                   [Matricaria chamomilla var. coronata]
                                                   [Matricaria courrantiana]
                                                   [Matricaria recutita]
                                             Matricaria discoidea
                                                   [Artemisia matricarioides]
                                                   [Chamomilla suaveolens]
                                                   [Lepidanthus suaveolens]
                                                   [Lepidotheca suaveolens]
                                                   [Matricaria matricarioides]
                                                   [Santolina suaveolens]
                                                   [Tanacetum suaveolens]
                                             Matricaria globifera
                                             Matricaria grandiflora
                                             Matricaria hookeri
                                             Matricaria inodora
                                             Matricaria maritima
                                               Matricaria maritima ssp. maritima
                                               Matricaria maritima ssp. phaeocephala
                                               Matricaria maritima var. nana
                                             Matricaria occidentalis
                                                   [Chamomilla occidentalis]
                                             Matricaria perforata
                                             Matricaria prostrata
                                             Matricaria suffruticosa
                                     Mauranthemum
                                             Mauranthemum paludosum
                                     Melampodium
                                             Melampodium appendiculatum
                                             Melampodium australe
                                             Melampodium cinereum
                                                   [Melampodium cinereum var. cinereum]
                                                   [Melampodium cinereum var. hirtellum]
                                                   [Melampodium cinereum var. ramosissimum]
                                             Melampodium divaricatum
                                                   [Dysodium divaricatum]
                                             Melampodium humile
                                             Melampodium leucanthum
                                             Melampodium longicorne
                                             Melampodium perfoliatum
                                                   [Alcina perfoliata]
                                             Melampodium ruderale
                                             Melampodium sericeum
                                                   [Melampodium hispidum]
                                             Melampodium strigosum
                                     Melanthera
                                             Melanthera angustifolia
                                             Melanthera biflora
                                                   [Lipochaeta ovata]
                                             Melanthera bryanii
                                                   [Lipochaeta bryanii]
                                             Melanthera fauriei
                                                   [Lipochaeta deltoidea]
                                                   [Lipochaeta fauriei]
                                             Melanthera integrifolia
                                                   [Lipochaeta integrifolia var. argentea]
                                                   [Lipochaeta integrifolia var. gracilis]
                                                   [Lipochaeta integrifolia var. major]
                                                   [Lipochaeta integrifolia var. megacephala]
                                                   [Lipochaeta integrifolia]
                                                   [Lipochaeta porophila]
                                             Melanthera kamolensis
                                                   [Lipochaeta kamolensis]
                                             Melanthera lavarum
                                                   [Lipochaeta lavarum var. conferta]
                                                   [Lipochaeta lavarum var. hillebrandiana]
                                                   [Lipochaeta lavarum var. lanaiensis]
                                                   [Lipochaeta lavarum var. longifolia]
                                                   [Lipochaeta lavarum var. maneleana]
                                                   [Lipochaeta lavarum var. ovata]
                                                   [Lipochaeta lavarum var. salicifolia]
                                                   [Lipochaeta lavarum var. scaposa]
                                                   [Lipochaeta lavarum var. skottsbergii]
                                                   [Lipochaeta lavarum var. stearnsii]
                                                   [Lipochaeta lavarum]
                                                   [Lipochaeta molokiniensis]
                                                   [Lipochaeta warshauerii]
                                             Melanthera micrantha
                                               Melanthera micrantha ssp. exigua
                                                     [Lipochaeta micrantha var. exigua]
                                               Melanthera micrantha ssp. micrantha
                                                     [Lipochaeta micrantha var. micrantha]
                                             Melanthera nivea
                                                   [Calea aspera]
                                                   [Melanthera aspera var. aspera]
                                                   [Melanthera aspera var. glabriuscula]
                                                   [Melanthera aspera]
                                                   [Melanthera calcicola]
                                                   [Melanthera canescens]
                                                   [Melanthera carpenteri]
                                                   [Melanthera confusa]
                                                   [Melanthera deltoidea]
                                                   [Melanthera hastata]
                                                   [Melanthera ligulata]
                                                   [Melanthera montana]
                                             Melanthera parvifolia
                                                   [Melanthera radiata]
                                             Melanthera perdita
                                                   [Lipochaeta kawaihoaensis]
                                                   [Lipochaeta perdita]
                                             Melanthera populifolia
                                                   [Lipochaeta flexuosa]
                                                   [Lipochaeta intermedia]
                                                   [Lipochaeta subcordata var. membranacea]
                                                   [Lipochaeta subcordata]
                                             Melanthera remyi
                                                   [Lipochaeta remyi]
                                             Melanthera subcordata
                                                   [Lipochaeta populifolia]
                                                   [Lipochaeta subcordata var. populifolia]
                                             Melanthera tenuifolia
                                                   [Lipochaeta tenuifolia]
                                             Melanthera tenuis
                                                   [Lipochaeta dubia]
                                                   [Lipochaeta minuscula]
                                                   [Lipochaeta tenuis var. sellingii]
                                                   [Lipochaeta tenuis]
                                             Melanthera venosa
                                                   [Lipochaeta pinnatifida]
                                                   [Lipochaeta setosa]
                                                   [Lipochaeta venosa]
                                             Melanthera waimeaensis
                                                   [Lipochaeta waimeaensis]
                                     Mesadenia
                                     Micropsis
                                             Micropsis dasycarpa
                                     Micropus
                                             Micropus amphibolus
                                                   [Micropus amphibola]
                                                   [Stylocline amphibola]
                                                   [Stylocline amphiloba]
                                             Micropus californicus
                                               Micropus californicus var. californicus
                                                     [Bombycilaena californica var. californica]
                                               Micropus californicus var. subvestitus
                                                     [Bombycilaena californica var. subvestita]
                                             Micropus dasycarpa
                                     Microseris
                                           [Apargidium]
                                           [Scorzonella]
                                             Microseris acuminata
                                             Microseris bigelovii
                                             Microseris borealis
                                                   [Apargidium boreale]
                                             Microseris campestris
                                             Microseris decipiens
                                             Microseris douglasii
                                               Microseris douglasii ssp. douglasii
                                               Microseris douglasii ssp. platycarpha
                                                     [Microseris douglasii var. platycarpha]
                                               Microseris douglasii ssp. tenella
                                             Microseris elegans
                                             Microseris heterocarpa
                                             Microseris howellii
                                             Microseris laciniata
                                               Microseris laciniata ssp. detlingii
                                               Microseris laciniata ssp. laciniata
                                                     [Scorzonella laciniata var. pratensis]
                                                     [Scorzonella laciniata]
                                                     [Scorzonella procera]
                                               Microseris laciniata ssp. leptosepala
                                                     [Scorzonella laciniata var. bolanderi]
                                                     [Scorzonella leachiana]
                                                     [Scorzonella leptosepala]
                                               Microseris laciniata ssp. siskiyouensis
                                                     [Microseris laciniata var. siskiyouensis]
                                             Microseris leptosepala
                                             Microseris lindleyi
                                             Microseris linearifolia
                                             Microseris nutans
                                                   [Microseris nutans ssp. nutans]
                                                   [Ptilocalais nutans]
                                                   [Scorzonella nutans var. major]
                                                   [Scorzonella nutans]
                                               Microseris nutans ssp. siskiyouensis
                                             Microseris paludosa
                                             Microseris sylvatica
                                     Mikania
                                             Mikania batatifolia
                                             Mikania congesta
                                                   [Mikania micrantha var. congesta]
                                             Mikania cordata
                                             Mikania cordifolia
                                                   [Cacalia cordifolia]
                                                   [Willoughbya halei]
                                             Mikania fragilis
                                             Mikania hookeriana
                                                   [Mikania badieri]
                                                   [Mikania hookeriana var. badieri]
                                                   [Mikania imrayana]
                                             Mikania latifolia
                                                   [Mikania latifolia var. dominicensis]
                                             Mikania micrantha
                                             Mikania odoratissima
                                             Mikania ovalis
                                             Mikania pachyphylla
                                             Mikania porosa
                                             Mikania scandens
                                                   [Mikania angulosa]
                                                   [Mikania scandens var. pubescens]
                                                   [Willoughbya heterophylla]
                                             Mikania stevensiana
                                     Mirasolia
                                     Molina
                                     Monolopia
                                           [Lembertia]
                                             Monolopia congdonii
                                                   [Eatonella congdonii]
                                                   [Lembertia congdonii]
                                             Monolopia gracilens
                                             Monolopia lanceolata
                                             Monolopia major
                                             Monolopia stricta
                                     Monoptilon
                                             Monoptilon bellidiforme
                                             Monoptilon bellioides
                                     Montagnaea
                                     Montanoa
                                             Montanoa hibiscifolia
                                                   [Montagnaea hibiscifolia]
                                     Mulgedium
                                             Mulgedium oblongifolium
                                                   [Lactuca tatarica var. heterophylla]
                                                   [Lactuca tatarica var. pulchella]
                                                   [Mulgedium pulchellum]
                                     Munzothamnus
                                           [Munzothammus]
                                             Munzothamnus blairii
                                                   [Munzothammus blairii]
                                     Mycelis
                                             Mycelis muralis
                                     Nabalus
                                     Nardosmia
                                     Neonesomia
                                             Neonesomia palmeri
                                                   [Xylothamia palmeri]
                                     Nestotus
                                             Nestotus macleanii
                                                   [Haplopappus macleanii]
                                             Nestotus stenophyllus
                                                   [Haplopappus stenophyllus]
                                     Neurolaena
                                             Neurolaena lobata
                                     Nicolletia
                                             Nicolletia edwardsii
                                             Nicolletia occidentalis
                                     Nipponanthemum
                                             Nipponanthemum nipponicum
                                     Nocca
                                     Nothocalais
                                             Nothocalais alpestris
                                                   [Agoseris alpestris]
                                                   [Agoseris barbellulata]
                                                   [Microseris alpestris]
                                             Nothocalais cuspidata
                                                   [Agoseris cuspidata]
                                                   [Microseris cuspidata]
                                             Nothocalais nigrescens
                                                   [Microseris nigrescens]
                                             Nothocalais troximoides
                                                   [Microseris troximoides]
                                                   [Scorzonella troximoides]
                                     Oclemena
                                             Oclemena X blakei
                                             Oclemena acuminata
                                                   [Aster acuminatus var. acuminatus]
                                                   [Aster acuminatus var. magdalenensis]
                                             Oclemena nemoralis
                                             Oclemena reticulata
                                                   [Doellingeria reticulata]
                                     Odontotrichum
                                     Oedera
                                     Oglifa
                                     Olearia
                                             Olearia allomii
                                             Olearia cheesmanii
                                     Oligoneuron
                                             Oligoneuron X krotkovii
                                                   [Solidago X krotkovii]
                                             Oligoneuron canescens
                                             Oligoneuron corymbosum
                                             Oligoneuron grandiflorum
                                             Oligoneuron jacksonii
                                             Oligoneuron rigidum
                                               Oligoneuron rigidum var. glabratum
                                               Oligoneuron rigidum var. humile
                                               Oligoneuron rigidum var. rigidum
                                     Oligosporus
                                             Oligosporus campestris
                                             Oligosporus caudatus
                                             Oligosporus dracunculus
                                               Oligosporus dracunculus ssp. dracunculinus
                                               Oligosporus dracunculus ssp. glaucus
                                             Oligosporus filifolius
                                             Oligosporus groenlandicus
                                             Oligosporus pacificus
                                             Oligosporus pedatifidus
                                     Omalotheca
                                             Omalotheca norvegica
                                             Omalotheca supina
                                             Omalotheca sylvatica
                                     Oncosiphon
                                             Oncosiphon piluliferum
                                             Oncosiphon suffruticosum
                                     Onopordum
                                             Onopordum acanthium
                                               Onopordum acanthium ssp. acanthium
                                             Onopordum illyricum
                                             Onopordum tauricum
                                     Oreastrum
                                     Oreochrysum
                                             Oreochrysum parryi
                                                   [Aster minor]
                                                   [Haplopappus parryi]
                                                   [Solidago parryi]
                                     Oreostemma
                                             Oreostemma alpigenum
                                               Oreostemma alpigenum var. alpigenum
                                               Oreostemma alpigenum var. andersonii
                                               Oreostemma alpigenum var. haydenii
                                                     [Oreostemma alpigenum ssp. haydenii]
                                             Oreostemma elatum
                                                   [Oreastrum elatum]
                                             Oreostemma peirsonii
                                     Ormenis
                                     Orochaenactis
                                             Orochaenactis thysanocarpha
                                     Osmadenia
                                             Osmadenia tenella
                                                   [Calycadenia tenella]
                                                   [Hemizonia tenella]
                                     Osmia
                                     Osteospermum
                                             Osteospermum calendulaceum
                                             Osteospermum ecklonis
                                                   [Dimorphotheca ecklonis]
                                             Osteospermum fruticosum
                                             Osteospermum muricatum
                                             Osteospermum sinuatum
                                             Osteospermum spinescens
                                     Othake
                                     Oxytenia
                                             Oxytenia acerosa
                                                   [Iva acerosa]
                                     Oönopsis
                                           [Oönopsis puebloensis]
                                             Oonopsis multicaulis
                                                   [Haplopappus multicaulis]
                                             Oönopsis engelmannii
                                                   [Haplopappus engelmannii]
                                             Oönopsis foliosa
                                               Oönopsis foliosa var. foliosa
                                                     [Haplopappus fremontii ssp. typicus]
                                                     [Haplopappus fremontii]
                                               Oönopsis foliosa var. monocephala
                                                     [Haplopappus fremontii ssp. monocephalus]
                                             Oönopsis puebloensis
                                             Oönopsis wardii
                                                   [Haplopappus fremontii ssp. wardii]
                                                   [Haplopappus wardii]
                                     Packera
                                             Packera anonyma
                                                   [Senecio anonymus]
                                                   [Senecio smallii]
                                             Packera antennariifolia
                                                   [Senecio antennariifolius]
                                             Packera aurea
                                                   [Senecio aureus var. aquilonius]
                                                   [Senecio aureus var. gracilis]
                                                   [Senecio aureus var. intercursus]
                                                   [Senecio aureus]
                                                   [Senecio gracilis]
                                             Packera bernardina
                                                   [Senecio bernardinus]
                                                   [Senecio ionophyllus var. sparsilobatus]
                                             Packera bolanderi
                                               Packera bolanderi var. bolanderi
                                                     [Senecio bolanderi var. bolanderi]
                                               Packera bolanderi var. harfordii
                                                     [Senecio bolanderi var. harfordii]
                                             Packera breweri
                                                   [Senecio breweri]
                                             Packera cana
                                                   [Senecio canus]
                                                   [Senecio convallium]
                                                   [Senecio hallii var. discoidea]
                                                   [Senecio hallii]
                                                   [Senecio harbourii]
                                                   [Senecio howellii]
                                                   [Senecio purshianus]
                                             Packera cardamine
                                                   [Senecio cardamine]
                                             Packera castoreus
                                                   [Senecio castoreus]
                                             Packera clevelandii
                                                   [Senecio cleavelandii]
                                                   [Senecio clevelandii var. heterophyllus]
                                                   [Senecio clevelandii]
                                             Packera contermina
                                                   [Senecio conterminus]
                                             Packera crocata
                                                   [Senecio crocatus var. wolfii]
                                                   [Senecio crocatus]
                                             Packera cymbalaria
                                                   [Packera fernaldii]
                                                   [Packera resedifolia]
                                                   [Senecio cymbalaria]
                                                   [Senecio resedifolius]
                                             Packera cynthioides
                                                   [Senecio cynthiodes]
                                                   [Senecio cynthioides]
                                                   [Senecio wrightii]
                                             Packera debilis
                                                   [Senecio debilis]
                                                   [Senecio fedifolius]
                                             Packera dimorphophylla
                                               Packera dimorphophylla var. dimorphophylla
                                                     [Packera dimorphophylla ssp. dimorphophylla]
                                                     [Senecio dimorphophyllus var. dimorphophyllus]
                                                     [Senecio dimorphophyllus]
                                                     [Senecio heterodoxus]
                                               Packera dimorphophylla var. intermedia
                                                     [Packera dimorphophylla ssp. intermedia]
                                                     [Senecio dimorphophyllus var. intermedius]
                                               Packera dimorphophylla var. paysonii
                                                     [Senecio dimorphophyllus var. paysonii]
                                               Packera dimorphophylla ssp. dimorphophylla
                                               Packera dimorphophylla ssp. intermedia
                                             Packera eurycephala
                                               Packera eurycephala var. eurycephala
                                                     [Senecio eurycephalus var. eurycephalus]
                                               Packera eurycephala var. lewisrosei
                                                     [Senecio eurycephalus var. lewisrosei]
                                             Packera fendleri
                                                   [Senecio fendleri var. lanatus]
                                                   [Senecio fendleri]
                                             Packera flettii
                                                   [Senecio flettii]
                                             Packera franciscana
                                                   [Senecio franciscanus]
                                             Packera ganderi
                                                   [Senecio ganderi]
                                             Packera glabella
                                                   [Senecio glabellus]
                                                   [Senecio lobatus]
                                             Packera greenei
                                                   [Senecio greenei]
                                             Packera hartiana
                                                   [Packera quaerens]
                                                   [Senecio hartianus]
                                                   [Senecio quaerens]
                                             Packera hesperia
                                                   [Senecio hesperius]
                                             Packera hyperborealis
                                                   [Senecio hyperborealis]
                                             Packera indecora
                                                   [Senecio indecorus]
                                                   [Senecio pauciflorus var. fallax]
                                             Packera ionophylla
                                                   [Senecio ionophyllus]
                                             Packera layneae
                                                   [Senecio layneae]
                                             Packera macounii
                                                   [Senecio ligulifolius]
                                                   [Senecio macounii]
                                             Packera malmstenii
                                                   [Senecio malmstenii]
                                             Packera mancosana
                                             Packera millefolia
                                                   [Senecio memmingeri]
                                                   [Senecio millefolium]
                                                   [Senecio millefolius]
                                             Packera millelobata
                                                   [Senecio millelobatus]
                                             Packera moresbiensis
                                             Packera multilobata
                                                   [Senecio lynceus var. leucoreus]
                                                   [Senecio lynceus]
                                                   [Senecio multilobatus]
                                                   [Senecio stygius]
                                                   [Senecio thornberi]
                                                   [Senecio uintahensis]
                                             Packera musiniensis
                                                   [Senecio musiniensis]
                                             Packera neomexicana
                                               Packera neomexicana var. mutabilis
                                                     [Packera neomexicana var. metcalfei]
                                                     [Senecio metcalfei]
                                                     [Senecio mutabilis]
                                                     [Senecio neomexicanus var. metcalfei]
                                                     [Senecio neomexicanus var. mutabilis]
                                               Packera neomexicana var. neomexicana
                                                     [Senecio eurypterus]
                                                     [Senecio neomexicanus var. griffithsii]
                                                     [Senecio neomexicanus var. neomexicanus]
                                                     [Senecio neomexicanus]
                                                     [Senecio oresbius]
                                                     [Senecio thurberi]
                                               Packera neomexicana var. toumeyi
                                                     [Senecio neomexicanus var. toumeyi]
                                                     [Senecio toumeyi]
                                             Packera o
                                             Packera obovata
                                                   [Senecio obovatus var. elliottii]
                                                   [Senecio obovatus var. rotundus]
                                                   [Senecio obovatus]
                                                   [Senecio rotundus]
                                             Packera ogotorukensis
                                                   [Senecio ogotorukensis]
                                             Packera pauciflora
                                                   [Senecio discoideus]
                                                   [Senecio pauciflorus]
                                             Packera paupercula
                                                   [Senecio balsamitae]
                                                   [Senecio crawfordii]
                                                   [Senecio gaspensis var. firmifolius]
                                                   [Senecio gaspensis]
                                                   [Senecio pauperculus var. balsamitae]
                                                   [Senecio pauperculus var. crawfordii]
                                                   [Senecio pauperculus var. firmifolius]
                                                   [Senecio pauperculus var. neoscoticus]
                                                   [Senecio pauperculus var. praelongus]
                                                   [Senecio pauperculus var. thompsoniensis]
                                                   [Senecio pauperculus]
                                                   [Senecio tweedyi]
                                             Packera plattensis
                                                   [Senecio plattensis]
                                                   [Senecio pseudotomentosus]
                                             Packera porteri
                                                   [Ligularia porteri]
                                                   [Senecio porteri]
                                             Packera pseudaurea
                                               Packera pseudaurea var. flavula
                                                     [Packera pseudaurea ssp. flavula]
                                                     [Senecio flavulus]
                                                     [Senecio pseudaureus ssp. flavulus]
                                                     [Senecio pseudaureus var. flavulus]
                                               Packera pseudaurea var. pseudaurea
                                                     [Senecio pauciflorus var. jucundulus]
                                                     [Senecio pseudaureus var. pseudaureus]
                                                     [Senecio pseudaureus]
                                               Packera pseudaurea var. semicordata
                                                     [Senecio aureus var. semicordatus]
                                                     [Senecio pseudaureus ssp. semicordatus]
                                                     [Senecio pseudaureus var. semicordatus]
                                                     [Senecio semicordatus]
                                             Packera pseudaurea ssp pseudaurea
                                               Packera pseudaurea ssp. flavula
                                             Packera quercetorum
                                                   [Senecio quercetorum]
                                             Packera sanguisorboides
                                                   [Senecio sanguisorboides]
                                             Packera schweinitziana
                                                   [Senecio robbinsii]
                                                   [Senecio schweinitizianus]
                                                   [Senecio schweinitzianus]
                                             Packera spellenbergii
                                                   [Senecio spellenbergii]
                                             Packera streptanthifolia
                                                   [Packera cymbalarioides]
                                                   [Packera oodes]
                                                   [Packera streptanthifolia var. rubricaulis]
                                                   [Packera streptanthifolia var. streptanthifolia]
                                                   [Senecio adamsii]
                                                   [Senecio aureus var. borealis]
                                                   [Senecio cymbalarioides var. borealis]
                                                   [Senecio cymbalarioides var. suksdorfii]
                                                   [Senecio fulgens]
                                                   [Senecio jonesii]
                                                   [Senecio laetiflorus]
                                                   [Senecio leonardii]
                                                   [Senecio longipetiolatus]
                                                   [Senecio oodes]
                                                   [Senecio pammelii]
                                                   [Senecio platylobus]
                                                   [Senecio rubricaulis]
                                                   [Senecio streptanthifolius var. borealis]
                                                   [Senecio streptanthifolius var. kluanei]
                                                   [Senecio streptanthifolius var. laetiflorus]
                                                   [Senecio streptanthifolius var. oodes]
                                                   [Senecio streptanthifolius var. rubricaulis]
                                                   [Senecio streptanthifolius var. streptanthifolius]
                                                   [Senecio streptanthifolius var. wallowensis]
                                                   [Senecio streptanthifolius]
                                                   [Senecio subcuneatus]
                                                   [Senecio suksdorfii]
                                                   [Senecio wardii]
                                             Packera subnuda
                                                   [Packera buekii]
                                                   [Senecio subnudus]
                                               Packera subnuda var. moresbiensis
                                                     [Senecio cymbalarioides ssp. moresbiensis]
                                                     [Senecio streptanthifolius var. moresbiensis]
                                               Packera subnuda var. subnuda
                                             Packera tampicana
                                                   [Senecio greggii]
                                                   [Senecio imparipinnatus]
                                                   [Senecio tampicanus]
                                             Packera texana
                                             Packera tomentosa
                                                   [Senecio alabamensis]
                                                   [Senecio tomentosus]
                                             Packera tridenticulata
                                                   [Senecio acutidens]
                                                   [Senecio densus]
                                                   [Senecio manitobensis]
                                                   [Senecio tridenticulatus]
                                             Packera werneriifolia
                                                   [Packera werneriifolia var. alpina]
                                                   [Senecio aureus var. werneriifolius]
                                                   [Senecio molinarius]
                                                   [Senecio muirii]
                                                   [Senecio saxosus var. toiyabensis]
                                                   [Senecio saxosus]
                                                   [Senecio werneriifolius var. alpinus]
                                                   [Senecio werneriifolius var. incertus]
                                                   [Senecio werneriifolius]
                                     Palafoxia
                                             Palafoxia arida
                                                   [Palafoxia arida var. arida]
                                                   [Palafoxia arida var. gigantea]
                                                   [Palafoxia linearis var. gigantea]
                                             Palafoxia callosa
                                                   [Othake callosa]
                                                   [Palafoxia callosa var. bella]
                                                   [Polypteris callosa]
                                             Palafoxia feayi
                                             Palafoxia hookeriana
                                                   [Palafoxia hookerana]
                                                   [Palafoxia hookeriana var. hookeriana]
                                                   [Palafoxia hookeriana var. minor]
                                             Palafoxia integrifolia
                                                   [Polypteris integrifolia]
                                             Palafoxia linearis
                                             Palafoxia reverchonii
                                             Palafoxia riograndensis
                                             Palafoxia rosea
                                                   [Palafoxia macrolepis]
                                                   [Palafoxia rosea var. macrolepis]
                                                   [Palafoxia rosea var. rosea]
                                                   [Palafoxia texana var. macrolepis]
                                               Palafoxia rosea var. macrolepis
                                             Palafoxia sphacelata
                                                   [Othake sphacelata]
                                                   [Polypteris hookeriana]
                                                   [Polypteris sphacelata]
                                             Palafoxia texana
                                                   [Palafoxia rosea var. ambigua]
                                                   [Palafoxia rosea var. papposa]
                                                   [Palafoxia texana var. ambigua]
                                                   [Palafoxia texana var. texana]
                                             Palafoxia tripteris
                                     Parasenecio
                                             Parasenecio auriculata
                                                   [Cacalia auriculata ssp. kamtschatica]
                                                   [Cacalia auriculata]
                                                   [Cacalia kamtschatica]
                                                   [Koyamacalia auriculata]
                                     Parthenice
                                             Parthenice mollis
                                     Parthenium
                                             Parthenium alpinum
                                                   [Parthenium alpinum var. tetraneuris]
                                                   [Parthenium tetraneuris]
                                             Parthenium argentatum
                                             Parthenium confertum
                                                   [Parthenium confertum var. confertum]
                                                   [Parthenium confertum var. divaricatum]
                                                   [Parthenium confertum var. intermedium]
                                                   [Parthenium confertum var. lyratum]
                                                   [Parthenium confertum var. microcephalum]
                                                   [Parthenium hysterophorus var. lyratum]
                                                   [Parthenium lyratum]
                                             Parthenium hysterophorus
                                                   [Parthenium lobatum]
                                             Parthenium incanum
                                             Parthenium integrifolium
                                                   [Parthenium auriculatum]
                                                   [Parthenium hispidum var. auriculatum]
                                                   [Parthenium hispidum]
                                                   [Parthenium integrifolium var. auriculatum]
                                                   [Parthenium integrifolium var. henryanum]
                                                   [Parthenium integrifolium var. hispidum]
                                                   [Parthenium integrifolium var. integrifolium]
                                                   [Parthenium integrifolium var. mabryanum]
                                                   [Parthenium radfordii]
                                                   [Parthenium radfordiii]
                                                   [Parthenium repens]
                                             Parthenium ligulatum
                                                   [Parthenium alpinum var. ligulatum]
                                     Pascalia
                                             Pascalia glauca
                                     Pectis
                                             Pectis X floridana
                                             Pectis angustifolia
                                               Pectis angustifolia var. angustifolia
                                               Pectis angustifolia var. fastigiata
                                                     [Pectis texana]
                                               Pectis angustifolia var. tenella
                                                     [Pectis tenella]
                                             Pectis carthusianorum
                                             Pectis ciliaris
                                                   [Pectis portoricensis]
                                             Pectis coulteri
                                             Pectis cylindrica
                                                   [Pectis postrata var. cylindrica]
                                                   [Pectis prostrata var. cylindrica]
                                             Pectis elongata
                                               Pectis elongata var. elongata
                                               Pectis elongata var. floribunda
                                             Pectis filipes
                                               Pectis filipes var. filipes
                                               Pectis filipes var. subnuda
                                             Pectis floribunda
                                             Pectis glaucescens
                                                   [Chthonia glaucescens]
                                                   [Pectis leptocephala]
                                             Pectis humifusa
                                             Pectis imberbis
                                             Pectis linearifolia
                                             Pectis linearis
                                                   [Pectis febrifuga]
                                             Pectis linifolia
                                             Pectis longipes
                                             Pectis papposa
                                               Pectis papposa var. grandis
                                               Pectis papposa var. papposa
                                             Pectis postrata
                                             Pectis prostrata
                                                   [Pectis multisetosa]
                                                   [Pectis prostrata var. urceolata]
                                             Pectis rusbyi
                                                   [Pectis palmeri]
                                             Pectis tenuicaulis
                                     Pentachaeta
                                             Pentachaeta alsinoides
                                             Pentachaeta aphantochaeta
                                             Pentachaeta aurea
                                                   [Pentachaeta orcuttii]
                                                   [Pentachaeta paleacea]
                                             Pentachaeta bellidiflora
                                                   [Pentachaeta exilis var. grayi]
                                             Pentachaeta exilis
                                               Pentachaeta exilis ssp. aeolica
                                               Pentachaeta exilis ssp. exilis
                                                     [Pentachaeta exilis var. aphantochaeta]
                                                     [Pentachaeta exilis var. discoidea]
                                             Pentachaeta fragilis
                                             Pentachaeta lyonii
                                     Pentanema
                                           [Vicoa]
                                     Pentzia
                                             Pentzia incana
                                                   [Pentzia virgata]
                                             Pentzia lanata
                                             Pentzia sphaerocephala
                                     Perezia
                                             Perezia multiflora
                                               Perezia multiflora ssp. multiflora
                                                     [Perezia multiflora var. multiflora]
                                               Perezia multiflora ssp. sonchifolia
                                                     [Perezia multiflora var. sonchifolia]
                                             Perezia sonchifolia
                                     Pericallis
                                             Pericallis hybrida
                                             Pericallis murrayi
                                             Pericallis webbii
                                     Pericome
                                             Pericome caudata
                                                   [Pericome caudata var. glandulosa]
                                                   [Pericome glandulosa]
                                               Pericome caudata var. caudata
                                               Pericome caudata var. glandulosa
                                     Perityle
                                             Perityle aglossa
                                             Perityle ajoensis
                                             Perityle ambrosiifolia
                                             Perityle angustifolia
                                                   [Laphamia angustifolia ssp. laciniata]
                                                   [Laphamia angustifolia]
                                             Perityle bisetosa
                                               Perityle bisetosa var. appressa
                                               Perityle bisetosa var. bisetosa
                                               Perityle bisetosa var. scalaris
                                             Perityle californica
                                                   [Perityle plumigera]
                                             Perityle cernua
                                                   [Laphamia cernua]
                                             Perityle ciliata
                                             Perityle cinerea
                                                   [Laphamia cinerea]
                                             Perityle cochisensis
                                                   [Laphamia cochisensis]
                                             Perityle congesta
                                                   [Laphamia congesta]
                                             Perityle coronopifolia
                                             Perityle dissecta
                                                   [Laphamia dissecta]
                                             Perityle emoryi
                                                   [Perityle emoryi var. nuda]
                                             Perityle fosteri
                                             Perityle gilensis
                                               Perityle gilensis var. gilensis
                                               Perityle gilensis var. salensis
                                                     [Laphamia gilensis ssp. longilobus]
                                             Perityle gracilis
                                                   [Laphamia fastigiata]
                                                   [Laphamia gracilis]
                                                   [Perityle fastigiata]
                                             Perityle halimifolia
                                             Perityle huecoensis
                                             Perityle intricata
                                                   [Laphamia intricata]
                                                   [Laphamia megalocephala ssp. intricata]
                                                   [Perityle megalocephala var. intricata]
                                             Perityle inyoensis
                                                   [Laphamia inyoensis]
                                             Perityle lemmonii
                                             Perityle lindheimeri
                                               Perityle lindheimeri var. halimifolia
                                               Perityle lindheimeri var. lindheimeri
                                                     [Laphamia halimifolia ssp. lindheimeri]
                                             Perityle megalocephala
                                               Perityle megalocephala var. megalocephala
                                               Perityle megalocephala var. oligophylla
                                             Perityle microglossa
                                                   [Perityle spilanthoides]
                                               Perityle microglossa var. microglossa
                                                     [Perityle microglossa var. effusa]
                                               Perityle microglossa var. saxosa
                                             Perityle parryi
                                             Perityle quinqueflora
                                                   [Laphamia quinqueflora]
                                             Perityle rotundata
                                             Perityle rupestris
                                                   [Perityle ruspestris]
                                               Perityle rupestris var. albiflora
                                               Perityle rupestris var. rupestris
                                             Perityle saxicola
                                                   [Laphamia saxicola]
                                             Perityle specuicola
                                             Perityle stansburyi
                                                   [Laphamia stansburii]
                                                   [Laphamia stansburyi]
                                                   [Perityle stansburii]
                                             Perityle staurophylla
                                               Perityle staurophylla var. homoflora
                                               Perityle staurophylla var. staurophylla
                                             Perityle tenella
                                                   [Laphamia palmeri var. tenella]
                                                   [Laphamia palmeri]
                                             Perityle turneri
                                             Perityle vaseyi
                                             Perityle villosa
                                                   [Laphamia villosa]
                                             Perityle vitreomontana
                                             Perityle warnockii
                                     Petasites
                                             Petasites frigidus
                                               Petasites frigidus var. frigidus
                                                     [Petasites alaskanus]
                                                     [Petasites corymbosus]
                                                     [Petasites frigidus ssp. nivalis]
                                                     [Petasites frigidus var. corymbosus]
                                                     [Petasites frigidus var. hyperboreoides]
                                                     [Petasites frigidus var. nivalis]
                                                     [Petasites gracilis]
                                                     [Petasites hyperboreus]
                                                     [Petasites nivalis]
                                               Petasites frigidus var. palmatus
                                                     [Nardosmia arctica]
                                                     [Petasites arcticus]
                                                     [Petasites frigidus ssp. arcticus]
                                                     [Petasites frigidus ssp. palmatus]
                                                     [Petasites hookerianus]
                                                     [Petasites palmatus]
                                                     [Petasites speciosus]
                                               Petasites frigidus var. sagittatus
                                                     [Petasites dentatus]
                                                     [Petasites sagittatus]
                                               Petasites frigidus var. vitifolius
                                                     [Nardosmia vitifolia]
                                                     [Petasites X vitifolius]
                                                     [Petasites nivalis ssp. vitifolius]
                                                     [Petasites palmatus var. frigidus]
                                                     [Petasites trigonophylla]
                                                     [Petasites warrenii]
                                             Petasites hybridus
                                                   [Petasites officinalis]
                                                   [Petasites vulgaris]
                                             Petasites japonicus
                                                   [Nardosmia japonica]
                                             Petasites sagittata
                                     Petradoria
                                             Petradoria discoidea
                                             Petradoria pumila
                                               Petradoria pumila ssp. graminea
                                                     [Petradoria pumila var. graminea]
                                                     [Solidago graminea]
                                               Petradoria pumila ssp. pumila
                                                     [Solidago petradoria]
                                     Peucephyllum
                                           [Pleucephyllum]
                                             Peucephyllum schottii
                                                   [Pleucephyllum schottii]
                                     Phaethusa
                                     Phalacroseris
                                             Phalacroseris bolanderi
                                                   [Phalacroseris bolanderi var. bolanderi]
                                                   [Phalacroseris bolanderi var. coronata]
                                     Phoebanthus
                                             Phoebanthus grandiflorus
                                                   [Phoebanthus grandiflora]
                                             Phoebanthus tenuifolius
                                                   [Phoebanthus tenuifolia]
                                     Phymaspermum
                                             Phymaspermum parvifolium
                                     Picradenia
                                             Picradenia helenioides
                                             Picradenia odorata
                                             Picradenia richardsonii
                                               Picradenia richardsonii var. floribunda
                                               Picradenia richardsonii ssp. richardsonii
                                     Picradeniopsis
                                             Picradeniopsis oppositifolia
                                                   [Bahia oppositifolia]
                                             Picradeniopsis woodhousei
                                                   [Bahia woodhousei]
                                     Picris
                                             Picris hieracioides
                                                   [Picris hieracioides ssp. hieracioides]
                                                   [Picris hieracioides ssp. kamtschatica]
                                                   [Picris hieracioides var. hieracioides]
                                                   [Picris kamtschatica]
                                             Picris pauciflora
                                             Picris rhagadioloides
                                             Picris sprengeriana
                                     Picrothamnus
                                             Picrothamnus desertorum
                                                   [Artemisia spinescens]
                                     Pinaropappus
                                             Pinaropappus parvus
                                             Pinaropappus roseus
                                                   [Achyrophorus roseus]
                                                   [Pinaropappus roseus var. foliosus]
                                                   [Pinaropappus roseus var. roseus]
                                     Piptocarpha
                                             Piptocarpha tetrantha
                                     Piptocoma
                                             Piptocoma acevedoi
                                             Piptocoma antillana
                                                   [Piptocoma rufescens]
                                     Pityopsis
                                             Pityopsis adenolepis
                                             Pityopsis aspera
                                               Pityopsis aspera var. adenolepis
                                               Pityopsis aspera var. aspera
                                             Pityopsis falcata
                                                   [Chrysopsis falcata]
                                             Pityopsis flexuosa
                                                   [Chrysopsis flexuosa]
                                             Pityopsis graminifolia
                                               Pityopsis graminifolia var. aequilifolia
                                               Pityopsis graminifolia var. graminifolia
                                               Pityopsis graminifolia var. latifolia
                                                     [Chrysopsis graminifolia var. latifolia]
                                               Pityopsis graminifolia var. tenuifolia
                                                     [Chrysopsis graminifolia var. microcephala]
                                                     [Pityopsis graminifolia var. microcephala]
                                               Pityopsis graminifolia var. tracyi
                                             Pityopsis microcephala
                                             Pityopsis oligantha
                                                   [Chrysopsis oligantha]
                                             Pityopsis pinifolia
                                                   [Chrysopsis pinifolia]
                                             Pityopsis ruthii
                                                   [Chrysopsis ruthii]
                                             Pityopsis tracyi
                                     Plateilema
                                             Plateilema palmeri
                                     Platyschkuhria
                                             Platyschkuhria integrifolia
                                                   [Bahia nudicaulis var. desertorum]
                                                   [Bahia nudicaulis var. oblongifolia]
                                                   [Bahia nudicaulis var. ourolepis]
                                                   [Bahia nudicaulis]
                                                   [Bahia oblongifolia]
                                                   [Bahia ourolepis]
                                                   [Platyschkuhria integrifolia var. desertorum]
                                                   [Platyschkuhria integrifolia var. integrifolia]
                                                   [Platyschkuhria integrifolia var. oblongifolia]
                                                   [Platyschkuhria integrifolia var. ourolepis]
                                                   [Platyschkuhria oblongifolia]
                                               Platyschkuhria integrifolia var. oblongifolia
                                     Plectocephalus
                                             Plectocephalus americanus
                                             Plectocephalus rothrockii
                                     Pleiacanthus
                                             Pleiacanthus spinosus
                                     Pleurocoronis
                                           [Pleurocornis]
                                             Pleurocoronis laphamioides
                                                   [Hofmeisteria laphamioides]
                                                   [Pleurocornis laphamioides]
                                             Pleurocoronis pluriseta
                                                   [Hofmeisteria pluriseta]
                                                   [Pleurocornis pluriseta]
                                     Pluchea
                                             Pluchea baccharis
                                                   [Pluchea rosea]
                                             Pluchea camphorata
                                                   [Pluchea petiolata]
                                                   [Pluchea viscida]
                                             Pluchea carolinensis
                                                   [Pluchea X fosbergii]
                                                   [Pluchea cortesii]
                                             Pluchea foetida
                                                   [Pluchea foetida var. foetida]
                                                   [Pluchea foetida var. imbricata]
                                                   [Pluchea imbricata]
                                                   [Pluchea tenuifolia]
                                             Pluchea indica
                                             Pluchea longifolia
                                             Pluchea odorata
                                               Pluchea odorata var. odorata
                                               Pluchea odorata var. succulenta
                                                     [Pluchea purpurascens var. succulenta]
                                             Pluchea purpurascens
                                             Pluchea sagittalis
                                                   [Pluchea quitoc]
                                                   [Pluchea suaveolens]
                                             Pluchea salicifolia
                                                   [Pluchea adnata]
                                             Pluchea sericea
                                                   [Berthelotia sericea]
                                                   [Polypappus sericeus]
                                                   [Tessaria sericea]
                                             Pluchea yucatanensis
                                     Podocoma
                                             Podocoma hieracifolia
                                     Podospermum
                                             Podospermum laciniatum
                                     Polymnia
                                             Polymnia canadensis
                                                   [Polymnia canadensis var. radiata]
                                                   [Polymnia radiata]
                                             Polymnia cossatotensis
                                             Polymnia laevigata
                                             Polymnia sonchifolia
                                     Polypappus
                                     Polypteris
                                     Porophyllum
                                             Porophyllum gracile
                                                   [Porophyllum caesium]
                                                   [Porophyllum junciforme]
                                                   [Porophyllum nodosum]
                                                   [Porophyllum putidum]
                                                   [Porophyllum vaseyi]
                                             Porophyllum greggii
                                             Porophyllum latifolium
                                             Porophyllum leiocarpum
                                                   [Porophyllum macrocephalum var. leiocarpum]
                                             Porophyllum macrocephalum
                                             Porophyllum porophyllum
                                             Porophyllum pygmaeum
                                             Porophyllum ruderale
                                                   [Porophyllum ellipticum]
                                               Porophyllum ruderale ssp. macrocephalum
                                                     [Porophyllum ruderale var. macrocephalum]
                                               Porophyllum ruderale ssp. ruderale
                                             Porophyllum scoparium
                                     Prenanthella
                                             Prenanthella exigua
                                                   [Lygodesmia exigua]
                                     Prenanthes
                                             Prenanthes X mainensis
                                             Prenanthes alata
                                                   [Prenanthes lessingii]
                                             Prenanthes alba
                                                   [Nabalus albus]
                                                   [Prenanthes alba var. alba]
                                                   [Prenanthes alba var. pallida]
                                             Prenanthes altissima
                                                   [Nabalus altissimus]
                                                   [Prenanthes altissima var. cinnamomea]
                                             Prenanthes aspera
                                                   [Nabalus asperus]
                                             Prenanthes autumnalis
                                                   [Nabalus virgatus]
                                                   [Prenanthes virgata]
                                             Prenanthes barbata
                                                   [Prenanthes serpentaria var. barbata]
                                             Prenanthes boottii
                                                   [Nabalus boottii]
                                             Prenanthes carrii
                                             Prenanthes crepidinea
                                                   [Nabalus crepidineus]
                                             Prenanthes japonica
                                             Prenanthes racemosa
                                                   [Nabalus racemosus]
                                                   [Prenanthes racemosa ssp. multiflora]
                                                   [Prenanthes racemosa ssp. racemosa]
                                                   [Prenanthes racemosa var. multiflora]
                                             Prenanthes roanensis
                                                   [Nabalus cylindricus]
                                                   [Nabalus roanensis]
                                                   [Prenanthes cylindrica]
                                             Prenanthes sagittata
                                                   [Prenanthes alata var. sagittata]
                                             Prenanthes serpentaria
                                                   [Nabalus integrifolius]
                                                   [Nabalus serpentarius]
                                                   [Prenanthes integrifolia]
                                             Prenanthes trifoliolata
                                                   [Nabalus nanus]
                                                   [Nabalus trifoliolatus]
                                                   [Prenanthes nana]
                                                   [Prenanthes trifoliata]
                                                   [Prenanthes trifoliolata var. nana]
                                     Prionopsis
                                             Prionopsis ciliata
                                     Proustia
                                     Psacalium
                                             Psacalium decompositum
                                                   [Cacalia decomposita]
                                                   [Odontotrichum decompositum]
                                     Psathyrotes
                                             Psathyrotes annua
                                             Psathyrotes pilifera
                                             Psathyrotes ramosissima
                                     Psathyrotopsis
                                             Psathyrotopsis scaposa
                                                   [Psathyrotes scaposa]
                                     Pseudelephantopus
                                           [Pseudo-elephantopus]
                                             Pseudelephantopus spicatus
                                                   [Elephantopus spicatus]
                                                   [Pseudo-elephantopus spicatus]
                                             Pseudelephantopus spiralis
                                                   [Pseudelephantopus spirilis]
                                     Pseudobahia
                                             Pseudobahia bahiifolia
                                             Pseudobahia heermannii
                                                   [Pseudobahia bahiifolia var. pinnatifida]
                                             Pseudobahia peirsonii
                                     Pseudoclappia
                                             Pseudoclappia arenaria
                                             Pseudoclappia watsonii
                                     Pseudognaphalium
                                             Pseudognaphalium arizonicum
                                                   [Gnaphalium arizonicum]
                                             Pseudognaphalium attenuatum
                                                   [Gnaphalium attenuatum]
                                             Pseudognaphalium austrotexanum
                                             Pseudognaphalium beneolens
                                                   [Gnaphalium beneolens]
                                                   [Gnaphalium canescens ssp. beneolens]
                                                   [Pseudognaphalium canescens ssp. beneolens]
                                             Pseudognaphalium biolettii
                                                   [Gnaphalium bicolor]
                                                   [Pseudognaphalium bicolor]
                                             Pseudognaphalium brachypterum
                                                   [Gnaphalium brachypterum]
                                             Pseudognaphalium californicum
                                                   [Gnaphalium californicum]
                                             Pseudognaphalium canescens
                                               Pseudognaphalium canescens ssp. canescens
                                                     [Gnaphalium canescens ssp. canescens]
                                                     [Gnaphalium canescens]
                                                     [Gnaphalium wrightii]
                                             Pseudognaphalium elegans
                                                   [Gnaphalium elegans]
                                             Pseudognaphalium helleri
                                                   [Gnaphalium helleri var. helleri]
                                               Pseudognaphalium helleri ssp. helleri
                                                     [Gnaphalium obtusifolium var. helleri]
                                             Pseudognaphalium jaliscense
                                                   [Gnaphalium jaliscense]
                                             Pseudognaphalium leucocephalum
                                                   [Gnaphalium leucocephaluim]
                                                   [Gnaphalium leucocephalum]
                                             Pseudognaphalium luteoalbum
                                                   [Gnaphalium luteoalbum]
                                             Pseudognaphalium macounii
                                                   [Gnaphalium decurrens]
                                                   [Gnaphalium macounii]
                                             Pseudognaphalium micradenium
                                                   [Gnaphalium helleri var. micradenium]
                                                   [Gnaphalium obtusifolium var. micradenium]
                                                   [Pseudognaphalium helleri ssp. micradenium]
                                             Pseudognaphalium microcephalum
                                                   [Gnaphalium canescens ssp. microcephalum]
                                                   [Gnaphalium microcephalum]
                                                   [Pseudognaphalium canescens ssp. microcephalum]
                                             Pseudognaphalium obtusifolium
                                                   [Gnaphalium obtusifolium var. obtusifolium]
                                                   [Gnaphalium obtusifolium var. praecox]
                                                   [Gnaphalium obtusifolium]
                                                   [Pseudognaphalium obtusifolium ssp. obtusifolium]
                                                   [Pseudognaphalium obtusifolium ssp. praecox]
                                             Pseudognaphalium pringlei
                                                   [Gnaphalium pringlei]
                                             Pseudognaphalium ramosissimum
                                                   [Gnaphalium ramosissimum]
                                             Pseudognaphalium roseum
                                                   [Gnaphalium roseum]
                                             Pseudognaphalium sandwicensium
                                               Pseudognaphalium sandwicensium var. hawaiiense
                                                     [Pseudognaphalium sandwicensium ssp. hawaiiense]
                                               Pseudognaphalium sandwicensium var. kilaueanum
                                                     [Gnaphalium sandwicensium var. kilaueanum]
                                                     [Pseudognaphalium sandwicensium ssp. kilaueanum]
                                               Pseudognaphalium sandwicensium var. molokaiense
                                                     [Gnaphalium sandwicensium var. molokaiense]
                                                     [Pseudognaphalium sandwicensium ssp. molokaiense]
                                               Pseudognaphalium sandwicensium var. sandwicensium
                                                     [Gnaphalium sandwicensium var. flagellare]
                                                     [Gnaphalium sandwicensium var. lineatum]
                                                     [Gnaphalium sandwicensium var. sandwicensium]
                                                     [Pseudognaphalium sandwicensium ssp. sandwicensium]
                                             Pseudognaphalium saxicola
                                                   [Gnaphalium obtusifolium var. saxicola]
                                                   [Gnaphalium saxicola]
                                                   [Pseudognaphalium obtusifolium ssp. saxicola]
                                             Pseudognaphalium stramineum
                                                   [Gnaphalium chilense var. confertifolium]
                                                   [Gnaphalium chilense]
                                                   [Gnaphalium stramineum]
                                             Pseudognaphalium thermale
                                                   [Gnaphalium canescens ssp. thermale]
                                                   [Gnaphalium microcephalum ssp. thermale]
                                                   [Gnaphalium microcephalum var. thermale]
                                                   [Gnaphalium thermale]
                                                   [Pseudognaphalium canescens ssp. thermale]
                                                   [Pseudognaphalium microcephalum var. thermale]
                                             Pseudognaphalium viscosum
                                                   [Gnaphalium viscosum]
                                     Pseudogynoxys
                                             Pseudogynoxys chenopodioides
                                     Psilactis
                                             Psilactis asteroides
                                                   [Psilactis lepta]
                                                   [Psilactis leptos]
                                             Psilactis brevilingulata
                                             Psilactis gentryi
                                             Psilactis heterocarpa
                                             Psilactis tenuis
                                     Psilocarphus
                                             Psilocarphus brevissimus
                                               Psilocarphus brevissimus var. brevissimus
                                               Psilocarphus brevissimus var. multiflorus
                                             Psilocarphus chilensis
                                                   [Psilocarphus tenellus var. globiferus]
                                                   [Psilocarphus tenellus var. tenuis]
                                             Psilocarphus elatior
                                             Psilocarphus oregonus
                                             Psilocarphus tenellus
                                                   [Psilocarphus tenellus var. tenellus]
                                     Psilochenia
                                             Psilochenia acuminata
                                             Psilochenia atribarba
                                             Psilochenia bakeri
                                             Psilochenia intermedia
                                             Psilochenia modocensis
                                               Psilochenia modocensis ssp. glareosa
                                               Psilochenia modocensis ssp. rostrata
                                               Psilochenia modocensis ssp. subacaulis
                                             Psilochenia occidentalis
                                               Psilochenia occidentalis ssp. conjuncta
                                             Psilochenia occidentalis ssp occidentalis
                                               Psilochenia occidentalis ssp. costata
                                             Psilochenia runcinata
                                               Psilochenia runcinata ssp. andersonii
                                               Psilochenia runcinata ssp. barberi
                                               Psilochenia runcinata ssp. glauca
                                               Psilochenia runcinata ssp. hallii
                                               Psilochenia runcinata ssp. hispidulosa
                                               Psilochenia runcinata ssp. imbricata
                                     Psilostrophe
                                             Psilostrophe bakeri
                                             Psilostrophe cooperi
                                                   [Riddellia cooperi]
                                             Psilostrophe gnaphalioides
                                                   [Psilostrophe gnaphaliodes]
                                             Psilostrophe sparsiflora
                                                   [Riddellia tagetina var. sparsiflora]
                                             Psilostrophe tagetina
                                                   [Psilostrophe tagetina var. grandiflora]
                                                   [Psilostrophe tagetina var. lanata]
                                                   [Psilostrophe tagetina var. tagetina]
                                                   [Riddellia tagetina]
                                             Psilostrophe tagetinae
                                             Psilostrophe villosa
                                                   [Psilostrophe tagetina var. cerifera]
                                     Pterocaulon
                                             Pterocaulon alopecuroidies
                                                   [Pterocaulon alopecuroideum]
                                             Pterocaulon pycnostachyum
                                                   [Pterocaulon undulatum]
                                             Pterocaulon virgatum
                                     Pteronia
                                     Pterophyton
                                     Ptilocalais
                                     Ptiloria
                                     Pugiopappus
                                     Pulicaria
                                             Pulicaria arabica
                                                   [Vicoa auriculata]
                                             Pulicaria dysenterica
                                                   [Inula dysenterica]
                                             Pulicaria paludosa
                                                   [Pulicaria hispanica]
                                     Pyrethrum
                                     Pyrrhopappus
                                             Pyrrhopappus carolinianus
                                                   [Pyrrhopappus carolinianus var. carolinianus]
                                                   [Pyrrhopappus carolinianus var. georgianus]
                                                   [Pyrrhopappus georgianus]
                                                   [Sitilias caroliniana]
                                             Pyrrhopappus grandiflorus
                                                   [Pyrrhopappus scaposus]
                                                   [Sitilias grandiflora]
                                             Pyrrhopappus pauciflorus
                                                   [Pyrrhopappus geiseri]
                                                   [Pyrrhopappus multicaulis var. geiseri]
                                                   [Pyrrhopappus multicaulis var. multicaulis]
                                                   [Pyrrhopappus multicaulis]
                                                   [Sitilias multicaulis]
                                             Pyrrhopappus rothrockii
                                     Pyrrocoma
                                             Pyrrocoma apargioides
                                                   [Haplopappus apargioides]
                                             Pyrrocoma carthamoides
                                               Pyrrocoma carthamoides var. carthamoides
                                                     [Haplopappus carthamoides ssp. rigidus]
                                                     [Haplopappus carthamoides var. erythropappus]
                                                     [Haplopappus carthamoides var. rigidus]
                                                     [Haplopappus carthamoides var. typicus]
                                                     [Haplopappus carthamoides]
                                               Pyrrocoma carthamoides var. cusickii
                                                     [Haplopappus carthamoides ssp. cusickii]
                                                     [Haplopappus carthamoides var. cusickii]
                                               Pyrrocoma carthamoides var. subsquarrosa
                                                     [Haplopappus carthamoides var. subsquarrosus]
                                             Pyrrocoma clementis
                                               Pyrrocoma clementis var. clementis
                                                     [Haplopappus clementis]
                                               Pyrrocoma clementis var. villosa
                                                     [Pyrrocoma villosa]
                                             Pyrrocoma congesta
                                             Pyrrocoma crocea
                                               Pyrrocoma crocea var. crocea
                                                     [Haplopappus croceus ssp. typicus]
                                                     [Haplopappus croceus]
                                               Pyrrocoma crocea var. genuflexa
                                                     [Haplopappus croceus var. genuflexus]
                                                     [Pyrrocoma genuflexa]
                                             Pyrrocoma hirta
                                               Pyrrocoma hirta var. hirta
                                                     [Haplopappus hirtus ssp. typicus]
                                                     [Haplopappus hirtus]
                                               Pyrrocoma hirta var. lanulosa
                                                     [Haplopappus hirtus ssp. lanulosus]
                                                     [Haplopappus hirtus var. lanulosus]
                                                     [Haplopappus lanulosus]
                                               Pyrrocoma hirta var. sonchifolia
                                                     [Haplopappus hirtus ssp. sonchifolius]
                                                     [Haplopappus hirtus var. sonchifolius]
                                             Pyrrocoma insecticruris
                                                   [Haplopappus insecticruris]
                                                   [Haplopappus integrifolius ssp. insecticruris]
                                             Pyrrocoma integrifolia
                                                   [Haplopappus integrifolius ssp. typicus]
                                                   [Haplopappus integrifolius]
                                             Pyrrocoma lanceolata
                                               Pyrrocoma lanceolata var. lanceolata
                                                     [Haplopappus lanceolatus ssp. solidagineus]
                                                     [Haplopappus lanceolatus ssp. tenuicaulis]
                                                     [Haplopappus lanceolatus ssp. vaseyi]
                                                     [Haplopappus lanceolatus var. lanceolatus]
                                                     [Haplopappus lanceolatus var. sublanatus]
                                                     [Haplopappus lanceolatus var. tenuicaulis]
                                                     [Haplopappus lanceolatus var. typicus]
                                                     [Haplopappus lanceolatus var. vaseyi]
                                                     [Haplopappus lanceolatus]
                                               Pyrrocoma lanceolata var. subviscosa
                                                     [Haplopappus subviscosus]
                                                     [Pyrrocoma subviscosa]
                                             Pyrrocoma lanulosa
                                             Pyrrocoma liatriformis
                                                   [Haplopappus integrifolius ssp. liatriformis]
                                                   [Haplopappus integrifolius ssp. scaberulus]
                                                   [Haplopappus liatriformis]
                                                   [Haplopappus racemosus ssp. liatriformis]
                                             Pyrrocoma linearis
                                                   [Haplopappus uniflorus ssp. linearis]
                                                   [Pyrrocoma uniflora var. linearis]
                                             Pyrrocoma lucida
                                                   [Haplopappus lucidus]
                                                   [Haplopappus racemosus ssp. lucidus]
                                             Pyrrocoma racemosa
                                               Pyrrocoma racemosa var. congesta
                                                     [Haplopappus racemosus ssp. congestus]
                                               Pyrrocoma racemosa var. paniculata
                                                     [Haplopappus paniculatus var. virgatus]
                                                     [Haplopappus racemosus ssp. brachycephalus]
                                                     [Haplopappus racemosus ssp. duriuscula]
                                                     [Haplopappus racemosus ssp. glomeratus]
                                                     [Haplopappus racemosus ssp. halophilus]
                                                     [Haplopappus racemosus ssp. prionophyllus]
                                                     [Haplopappus racemosus var. glomerellus]
                                                     [Haplopappus racemosus var. paniculatus]
                                                     [Haplopappus racemosus var. prionophyllus]
                                               Pyrrocoma racemosa var. pinetorum
                                                     [Haplopappus racemosus ssp. pinetorum]
                                               Pyrrocoma racemosa var. racemosa
                                                     [Haplopappus racemosus var. racemosus]
                                                     [Haplopappus racemosus]
                                               Pyrrocoma racemosa var. sessiliflora
                                                     [Haplopappus racemosus ssp. sessiliflorus]
                                                     [Haplopappus racemosus var. sessiliflorus]
                                               Pyrrocoma racemosa var. virgata
                                             Pyrrocoma radiata
                                                   [Haplopappus carthamoides var. maximus]
                                                   [Haplopappus radiatus]
                                                   [Pyrrocoma radiata var. radiata]
                                                   [Pyrrocoma radiata var. sessiliflora]
                                             Pyrrocoma sessiliflora
                                             Pyrrocoma sonchifolia
                                             Pyrrocoma subsquarrosa
                                             Pyrrocoma uniflora
                                               Pyrrocoma uniflora var. gossypina
                                                     [Haplopappus uniflorus ssp. gossypinus]
                                                     [Pyrrocoma gossypina]
                                               Pyrrocoma uniflora var. uniflora
                                                     [Haplopappus contractus]
                                                     [Haplopappus uniflorus ssp. howellii]
                                                     [Haplopappus uniflorus ssp. typicus]
                                                     [Haplopappus uniflorus var. howellii]
                                                     [Haplopappus uniflorus var. uniflorus]
                                                     [Haplopappus uniflorus]
                                                     [Pyrrocoma howellii]
                                     Rafinesquia
                                             Rafinesquia californica
                                             Rafinesquia neomexicana
                                     Raillardella
                                           [Raillardella rothrockii]
                                             Raillardella argentea
                                                   [Raillardella minima]
                                                   [Raillardia argentea]
                                             Raillardella pringlei
                                             Raillardella scaposa
                                     Raillardia
                                     Railliardia
                                             Railliardia X vafra
                                             Railliardia ciliolata
                                             Railliardia hillebrandii
                                             Railliardia linearis
                                             Railliardia lonchophylla
                                             Railliardia scabra
                                     Rainiera
                                             Rainiera stricta
                                                   [Luina stricta]
                                     Ratibida
                                             Ratibida columnifera
                                                   [Lepachys columnaris]
                                                   [Lepachys columnifera]
                                                   [Ratibida columnaris var. pulcherrima]
                                                   [Ratibida columnaris]
                                                   [Rudbeckia columnifera]
                                             Ratibida peduncularis
                                               Ratibida peduncularis var. peduncularis
                                                     [Lepachys peduncularis]
                                               Ratibida peduncularis var. picta
                                                     [Lepachys peduncularis var. picta]
                                             Ratibida picta
                                             Ratibida pinnata
                                                   [Lepachys pinnata]
                                                   [Rudbeckia pinnata]
                                             Ratibida tagetes
                                                   [Rudbeckia globosa]
                                                   [Rudbeckia tagetes]
                                     Rayjacksonia
                                             Rayjacksonia annua
                                                   [Haplopappus annuus]
                                                   [Haplopappus phyllocephalus ssp. annuus]
                                                   [Haplopappus phyllocephalus var. annuus]
                                                   [Machaeranthera annua]
                                                   [Machaeranthera phyllocephala var. annua]
                                                   [Sideranthus annuus]
                                             Rayjacksonia aurea
                                                   [Haplopappus aureus]
                                                   [Machaeranthera aurea]
                                                   [Sideranthus aureus]
                                             Rayjacksonia phyllocephala
                                                   [Eriocarpum megacephalum]
                                                   [Haplopappus megacephalus]
                                                   [Haplopappus phyllocephalus var. megacephalus]
                                                   [Haplopappus phyllocephalus]
                                                   [Machaeranthera phyllocephala var. megacephala]
                                                   [Machaeranthera phyllocephala]
                                                   [Sideranthus megacephalus]
                                     Reichardia
                                             Reichardia picroides
                                             Reichardia tingitana
                                     Remya
                                             Remya kauaiensis
                                                   [Remya kauaiensis var. magnifica]
                                                   [Remya kauaiensis var. magnifolia]
                                             Remya mauiensis
                                             Remya montgomeryi
                                     Rhagadiolus
                                             Rhagadiolus stellatus
                                                   [Rhagadiolus edulis]
                                     Rhaponticum
                                             Rhaponticum repens
                                     Rhodanthe
                                             Rhodanthe chlorocephala
                                               Rhodanthe chlorocephala ssp. chlorocephala
                                               Rhodanthe chlorocephala ssp. rosea
                                     Ridan
                                     Riddellia
                                     Rigiopappus
                                             Rigiopappus leptocladus
                                     Rolandra
                                             Rolandra fruticosa
                                                   [Rolandra argentea]
                                     Roldana
                                             Roldana hartwegii
                                                   [Roldana carlomasonii]
                                             Roldana petasitis
                                     Rudbeckia
                                           [Dracopis]
                                             Rudbeckia acuminata
                                             Rudbeckia alismifolia
                                             Rudbeckia alpicola
                                                   [Rudbeckia occidentalis var. alpicola]
                                             Rudbeckia ampla
                                             Rudbeckia amplexicaulis
                                                   [Dracopis amplexicaulis]
                                             Rudbeckia auriculata
                                                   [Rudbeckia fulgida var. auriculata]
                                             Rudbeckia californica
                                                   [Rudbeckia californica var. californica]
                                             Rudbeckia chapmanii
                                             Rudbeckia deamii
                                             Rudbeckia foliosa
                                             Rudbeckia fulgida
                                               Rudbeckia fulgida var. deamii
                                               Rudbeckia fulgida var. fulgida
                                               Rudbeckia fulgida var. palustris
                                               Rudbeckia fulgida var. spathulata
                                               Rudbeckia fulgida var. speciosa
                                               Rudbeckia fulgida var. sullivantii
                                                     [Rudbeckia speciosa var. sullivantii]
                                               Rudbeckia fulgida var. umbrosa
                                             Rudbeckia glaucescens
                                                   [Rudbeckia californica var. glauca]
                                             Rudbeckia gloriosa
                                             Rudbeckia graminifolia
                                             Rudbeckia grandiflora
                                               Rudbeckia grandiflora var. alismifolia
                                               Rudbeckia grandiflora var. grandiflora
                                             Rudbeckia heliopsidis
                                             Rudbeckia heterophylla
                                             Rudbeckia hirta
                                               Rudbeckia hirta var. angustifolia
                                                     [Rudbeckia divergens]
                                                     [Rudbeckia floridana var. angustifolia]
                                               Rudbeckia hirta var. floridana
                                                     [Rudbeckia floridana]
                                               Rudbeckia hirta var. hirta
                                                     [Rudbeckia amplectens]
                                                     [Rudbeckia brittonii]
                                                     [Rudbeckia hirta var. brittonii]
                                                     [Rudbeckia hirta var. monticola]
                                                     [Rudbeckia monticola]
                                               Rudbeckia hirta var. pulcherrima
                                                     [Rudbeckia bicolor]
                                                     [Rudbeckia hirta var. corymbifera]
                                                     [Rudbeckia hirta var. lanceolata]
                                                     [Rudbeckia hirta var. sericea]
                                                     [Rudbeckia hirta var. serotina]
                                                     [Rudbeckia longipes]
                                                     [Rudbeckia sericea]
                                                     [Rudbeckia serotina var. corymbifera]
                                                     [Rudbeckia serotina var. lanceolata]
                                                     [Rudbeckia serotina var. sericea]
                                                     [Rudbeckia serotina]
                                             Rudbeckia klamathensis
                                                   [Rudbeckia californica var. intermedia]
                                             Rudbeckia laciniata
                                               Rudbeckia laciniata var. ampla
                                                     [Rudbeckia laciniata ssp. ampla]
                                               Rudbeckia laciniata var. bipinnata
                                               Rudbeckia laciniata var. heterophylla
                                               Rudbeckia laciniata var. humilis
                                                     [Rudbeckia laciniata var. digitata]
                                               Rudbeckia laciniata var. laciniata
                                                     [Rudbeckia laciniata var. gaspereauensis]
                                                     [Rudbeckia laciniata var. hortensis]
                                             Rudbeckia maxima
                                             Rudbeckia missouriensis
                                                   [Rudbeckia fulgida var. missouriensis]
                                             Rudbeckia mohrii
                                             Rudbeckia mollis
                                             Rudbeckia montana
                                                   [Rudbeckia occidentalis var. montana]
                                             Rudbeckia nitida
                                                   [Rudbeckia glabra]
                                                   [Rudbeckia nitida var. nitida]
                                             Rudbeckia occidentalis
                                                   [Rudbeckia occidentalis var. occidentalis]
                                               Rudbeckia occidentalis var. montana
                                             Rudbeckia palustris
                                             Rudbeckia scabrifolia
                                             Rudbeckia spathulata
                                             Rudbeckia speciosa
                                             Rudbeckia subtomentosa
                                             Rudbeckia sullivantii
                                             Rudbeckia tenax
                                             Rudbeckia texana
                                                   [Rudbeckia nitida var. texana]
                                             Rudbeckia triloba
                                               Rudbeckia triloba var. pinnatiloba
                                                     [Rudbeckia pinnatiloba]
                                               Rudbeckia triloba var. rupestris
                                                     [Rudbeckia rupestris]
                                               Rudbeckia triloba var. triloba
                                                     [Rudbeckia beadlei]
                                                     [Rudbeckia triloba var. beadlei]
                                             Rudbeckia truncata
                                             Rudbeckia umbrosa
                                     Rugelia
                                             Rugelia nudicaulis
                                                   [Cacalia rugelia]
                                     Rydbergia
                                             Rydbergia brandegeei
                                             Rydbergia brandegei
                                             Rydbergia grandiflora
                                     Sachsia
                                             Sachsia polycephala
                                                   [Sachsia bahamensis]
                                     Salmea
                                             Salmea scandens
                                     Santolina
                                             Santolina chamaecyparissus
                                             Santolina neapolitana
                                             Santolina rosmarinifolia
                                                   [Santolina virens]
                                     Sanvitalia
                                             Sanvitalia abertii
                                             Sanvitalia ocymoides
                                             Sanvitalia procumbens
                                                   [Sanvitalia angustifolia]
                                     Sartwellia
                                             Sartwellia flaveriae
                                                   [Sartwellia puberula]
                                             Sartwellia gypsophila
                                     Saussurea
                                             Saussurea X tschuktschorum
                                             Saussurea amara
                                                   [Saussurea glomerata]
                                               Saussurea amara var. amara
                                               Saussurea amara var. glomerata
                                             Saussurea americana
                                             Saussurea angustifolia
                                               Saussurea angustifolia var. angustifolia
                                               Saussurea angustifolia var. viscida
                                               Saussurea angustifolia var. yukonensis
                                                     [Saussurea angustifolia ssp. yukonensis]
                                                     [Saussurea viscida var. yukonensis]
                                             Saussurea costus
                                             Saussurea nuda
                                                   [Saussurea alpina]
                                                   [Saussurea densa]
                                                   [Saussurea nuda ssp. densa]
                                                   [Saussurea nuda var. densa]
                                                   [Serratula alpina]
                                             Saussurea tilesii
                                             Saussurea triangulata
                                             Saussurea viscida
                                             Saussurea weberi
                                     Scabrethia
                                             Scabrethia scabra
                                               Scabrethia scabra ssp. attenuata
                                               Scabrethia scabra ssp. canescens
                                               Scabrethia scabra ssp. scabra
                                                     [Wyethia scabra var. scabra]
                                                     [Wyethia scabra]
                                     Schkuhria
                                             Schkuhria multiflora
                                                   [Bahia neomexicana]
                                                   [Schkuhria multiflora var. multiflora]
                                             Schkuhria pinnata
                                                   [Schkuhria anthemoidea var. anthemoidea]
                                                   [Schkuhria anthemoidea var. wrightii]
                                                   [Schkuhria anthemoidea]
                                                   [Schkuhria pinnata var. guatemalensis]
                                                   [Schkuhria pinnata var. pinnata]
                                                   [Schkuhria pinnata var. wislizeni]
                                                   [Schkuhria wislizeni var. frustrata]
                                                   [Schkuhria wislizeni var. wislizeni]
                                                   [Schkuhria wislizeni var. wrightii]
                                                   [Schkuhria wislizeni]
                                                   [Schkuhria wislizenii]
                                     Sclerocarpus
                                             Sclerocarpus africanus
                                             Sclerocarpus uniserialis
                                                   [Sclerocarpus uniserialis var. austrotexanus]
                                                   [Sclerocarpus uniserialis var. uniserialis]
                                     Sclerolepis
                                             Sclerolepis uniflora
                                     Scolymus
                                             Scolymus hispanicus
                                                   [Scolymus grandiflorus]
                                                   [Scolymus hispanica]
                                             Scolymus maculatus
                                     Scorzonera
                                             Scorzonera hispanica
                                                   [Scorzonera hispanicus]
                                             Scorzonera laciniata
                                     Selloa
                                     Senecio
                                             Senecio X hybridus
                                             Senecio actinella
                                                   [Packera actinella]
                                                   [Senecio actinella var. mogollonicus]
                                             Senecio alaskanus
                                             Senecio ambrosioides
                                             Senecio amplectens
                                               Senecio amplectens var. amplectens
                                               Senecio amplectens var. holmii
                                             Senecio ampullaceus
                                             Senecio anteuphorbium
                                             Senecio aphanactis
                                             Senecio aquaticus
                                               Senecio aquaticus ssp. barbareifolius
                                             Senecio arizonicus
                                             Senecio aronicoides
                                             Senecio astephanus
                                             Senecio atratus
                                             Senecio atropurpureus
                                             Senecio bicolor
                                             Senecio bigelovii
                                               Senecio bigelovii var. bigelovii
                                               Senecio bigelovii var. hallii
                                             Senecio bivestitus
                                             Senecio blochmaniae
                                             Senecio bolanderi
                                             Senecio cacalioides
                                             Senecio californicus
                                             Senecio cannabifolius
                                             Senecio cannabinifolius
                                             Senecio capillaris
                                             Senecio carlomasonii
                                             Senecio cineraria
                                             Senecio clarkianus
                                             Senecio confusus
                                             Senecio congestus
                                             Senecio crassulus
                                                   [Senecio crassulus var. cusickii]
                                             Senecio cruentus
                                             Senecio cymbalarioides
                                             Senecio elegans
                                             Senecio elmeri
                                                   [Senecio crepidineus]
                                             Senecio eremophilus
                                               Senecio eremophilus var. eremophilus
                                               Senecio eremophilus var. kingii
                                               Senecio eremophilus var. macdougalii
                                                     [Senecio eremophilus ssp. macdougalii]
                                               Senecio eremophilus ssp. kingii
                                             Senecio erraticus
                                             Senecio ertterae
                                             Senecio erucifolius
                                             Senecio eurycephalus
                                             Senecio flaccidus
                                               Senecio flaccidus var. douglasii
                                                     [Senecio douglasii var. tularensis]
                                                     [Senecio douglasii]
                                               Senecio flaccidus var. flaccidus
                                                     [Senecio douglasii ssp. longilobus]
                                                     [Senecio douglasii var. jamesii]
                                                     [Senecio douglasii var. longilobus]
                                                     [Senecio filifolius]
                                                     [Senecio longilobus]
                                               Senecio flaccidus var. monoensis
                                                     [Senecio douglasii var. monoensis]
                                                     [Senecio monoensis]
                                             Senecio fremontii
                                               Senecio fremontii var. blitoides
                                                     [Senecio blitoides]
                                                     [Senecio carthamoides]
                                                     [Senecio fremontii ssp. blitoides]
                                               Senecio fremontii var. fremontii
                                               Senecio fremontii var. inexpectatus
                                               Senecio fremontii var. occidentalis
                                                     [Senecio fremontii ssp. occidentalis]
                                               Senecio fremontii ssp. blitoides
                                             Senecio frigidus
                                             Senecio fuscatus
                                             Senecio glaucifolius
                                             Senecio glomeratus
                                                   [Erechtites arguta]
                                                   [Erechtites glomerata]
                                                   [Senecio argutus]
                                             Senecio grandifolius
                                             Senecio harfordii
                                             Senecio hieraciifolia
                                             Senecio hieraciifolius
                                             Senecio holmii
                                             Senecio huachucanus
                                             Senecio hybridus
                                             Senecio hydrophiloides
                                                   [Senecio foetidus var. hydrophiloides]
                                                   [Senecio foetidus]
                                                   [Senecio pereziifolius]
                                             Senecio hydrophilus
                                                   [Senecio sandvicensis]
                                                   [Senecio sandwicensis]
                                             Senecio integerrimus
                                               Senecio integerrimus var. exaltatus
                                                     [Senecio columbianus]
                                                     [Senecio exaltatus]
                                                     [Senecio hookeri]
                                                     [Senecio integerrimus var. vaseyi]
                                                     [Senecio lugens var. exaltatus]
                                                     [Senecio vaseyi]
                                               Senecio integerrimus var. integerrimus
                                               Senecio integerrimus var. major
                                               Senecio integerrimus var. ochroleucus
                                                     [Senecio lugens var. ochroleucus]
                                               Senecio integerrimus var. scribneri
                                                     [Senecio scribneri]
                                             Senecio integrifolius
                                             Senecio jacobaea
                                             Senecio kingii
                                             Senecio kjellmanii
                                             Senecio lemmonii
                                             Senecio lewisrosei
                                             Senecio lindstroemii
                                             Senecio lucidus
                                             Senecio lugens
                                                   [Senecio integerrimus var. lugens]
                                             Senecio lyonii
                                             Senecio macdougalii
                                             Senecio madagascariensis
                                             Senecio magnificus
                                             Senecio mandraliscae
                                             Senecio megacephalus
                                             Senecio mikanioides
                                             Senecio minimus
                                             Senecio mohavensis
                                             Senecio moresbiensis
                                             Senecio muehlenbergii
                                             Senecio multicapitatus
                                             Senecio multidentatus
                                               Senecio multidentatus var. huachucanus
                                               Senecio multidentatus var. multidentatus
                                             Senecio murrayi
                                             Senecio neowebsteri
                                                   [Ligularia websteri]
                                                   [Senecio websteri]
                                             Senecio newcombei
                                             Senecio palmensis
                                             Senecio palustris
                                             Senecio parryi
                                             Senecio pattersonensis
                                             Senecio petasitis
                                             Senecio pseudoarnica
                                                   [Senecio pseudo-arnica]
                                             Senecio pudicus
                                                   [Ligularia pudica]
                                                   [Senecio cernuus]
                                             Senecio quaylei
                                             Senecio rapifolius
                                             Senecio riddellii
                                                   [Senecio spartioides var. fremontii]
                                                   [Senecio spartioides var. parksii]
                                             Senecio rugelia
                                             Senecio rupestris
                                             Senecio sacramentanus
                                             Senecio salignus
                                             Senecio scorzonella
                                                   [Senecio covillei var. scorzonella]
                                                   [Senecio covillei]
                                             Senecio seemanii
                                             Senecio serra
                                               Senecio serra var. admirabilis
                                                     [Senecio admirabilis]
                                               Senecio serra var. serra
                                                     [Senecio serra var. altior]
                                                     [Senecio serra var. integriusculus]
                                               Senecio serra var. var serra
                                             Senecio sheldonensis
                                             Senecio silignus
                                             Senecio soldanella
                                                   [Ligularia soldanella]
                                             Senecio spartioides
                                                   [Senecio multicapitatus]
                                                   [Senecio spartioides var. granularis]
                                                   [Senecio spartioides var. multicapitatus]
                                                   [Senecio spartioides var. spartioides]
                                                   [Senecio toiyabensis]
                                             Senecio sphaerocephalus
                                             Senecio spribillei
                                             Senecio squalidus
                                             Senecio suaveolens
                                                   [Cacalia suaveolens]
                                                   [Hasteola suaveolens]
                                                   [Synosma suaveolens]
                                             Senecio sylvaticus
                                                   [Senecio sylvatica]
                                             Senecio taraxacoides
                                                   [Ligularia taraxacoides]
                                                   [Senecio amplectens var. taraxacoides]
                                             Senecio tichomirovii
                                             Senecio triangularis
                                                   [Senecio gibbsonsii]
                                                   [Senecio triangularis var. angustifolius]
                                             Senecio tundricola
                                             Senecio valerianifolius
                                             Senecio viscosus
                                             Senecio vulgaris
                                             Senecio warnockii
                                             Senecio webbii
                                             Senecio wootonii
                                             Senecio yukonensis
                                     Senecioides
                                     Sericocarpus
                                             Sericocarpus asteroides
                                             Sericocarpus californicus
                                             Sericocarpus linifolius
                                             Sericocarpus oregonensis
                                               Sericocarpus oregonensis ssp. californicus
                                                     [Sericocarpus oregonensis var. californicus]
                                               Sericocarpus oregonensis ssp. oregonensis
                                                     [Sericocarpus oregonensis var. oregonensis]
                                             Sericocarpus rigidus
                                             Sericocarpus tortifolius
                                                   [Sericocarpus acutisquamosus]
                                                   [Sericocarpus bifoliatus]
                                     Serinia
                                     Seriphidium
                                             Seriphidium arbusculum
                                               Seriphidium arbusculum ssp. arbusculum
                                               Seriphidium arbusculum ssp. longilobum
                                             Seriphidium argillosum
                                             Seriphidium canum
                                               Seriphidium canum ssp. bolanderi
                                               Seriphidium canum ssp. viscidulum
                                             Seriphidium novum
                                             Seriphidium pygmaeum
                                             Seriphidium tridentatum
                                               Seriphidium tridentatum ssp. parishii
                                               Seriphidium tridentatum ssp. vaseyanum
                                               Seriphidium tridentatum ssp. wyomingense
                                               Seriphidium tridentatum ssp. tridentatum
                                               Seriphidium tridentatum ssp. wyomingensis
                                             Seriphidium tripartitum
                                             Seriphidium vaseyanum
                                     Serratula
                                             Serratula tinctoria
                                     Shinnersia
                                             Shinnersia rivularis
                                                   [Trichocoronis rivularis]
                                     Shinnersoseris
                                             Shinnersoseris rostrata
                                                   [Lygodesmia rostrata]
                                     Sideranthus
                                             Sideranthus glaberrimus
                                             Sideranthus gooddingii
                                             Sideranthus turbinellus
                                     Sigesbeckia
                                             Sigesbeckia jorullensis
                                             Sigesbeckia orientalis
                                     Silphium
                                             Silphium albiflorum
                                             Silphium angustum
                                             Silphium asperimum
                                             Silphium asperrimum
                                             Silphium asteriscus
                                               Silphium asteriscus var. asteriscus
                                                     [Silphium asteriscus var. scabrum]
                                                     [Silphium dentatum var. gatesii]
                                               Silphium asteriscus var. dentatum
                                                     [Silphium asteriscus ssp. dentatum]
                                                     [Silphium asteriscus var. angustatum]
                                                     [Silphium asteriscus var. dentata]
                                                     [Silphium asteriscus var. laevicaule]
                                                     [Silphium dentatum var. angustatum]
                                               Silphium asteriscus var. latifolium
                                                     [Silphium asteriscus ssp. latifolium]
                                                     [Silphium asteriscus var. latrifolium]
                                                     [Silphium trifoliatum var. latifolium]
                                               Silphium asteriscus var. simpsonii
                                               Silphium asteriscus var. trifoliatum
                                                     [Silphium asteriscus ssp. trifoliatum]
                                                     [Silphium trifoliatum var. trifoliatum]
                                             Silphium atropurpureum
                                             Silphium brachiatum
                                             Silphium chickamaugense
                                             Silphium compositum
                                                   [Silphium compositum ssp. ovatifolium]
                                                   [Silphium compositum ssp. reniforme]
                                                   [Silphium compositum ssp. venosum]
                                                   [Silphium compositum var. compositum]
                                                   [Silphium compositum var. ovatifolium]
                                                   [Silphium compositum var. reniforme]
                                                   [Silphium compositum var. venosum]
                                                   [Silphium lapsuum]
                                                   [Silphium orae]
                                                   [Silphium ovatifolium]
                                                   [Silphium reniforme]
                                                   [Silphium venosum]
                                             Silphium confertifolium
                                             Silphium connatum
                                             Silphium dentatum
                                             Silphium elliottii
                                             Silphium gatesii
                                             Silphium glabrum
                                             Silphium glutinosum
                                             Silphium gracile
                                             Silphium incisum
                                             Silphium integrifolium
                                               Silphium integrifolium var. asperrimum
                                               Silphium integrifolium var. gattingeri
                                               Silphium integrifolium var. integrifolium
                                                     [Silphium integrifolium var. deamii]
                                                     [Silphium integrifolium var. neglectum]
                                               Silphium integrifolium var. laeve
                                                     [Silphium speciosum]
                                             Silphium laciniatum
                                                   [Silphium laciniatum var. laciniatum]
                                                   [Silphium laciniatum var. robinsonii]
                                             Silphium mohrii
                                             Silphium nodum
                                             Silphium perfoliatum
                                               Silphium perfoliatum var. connatum
                                                     [Silphium perfoliatum ssp. connatum]
                                               Silphium perfoliatum var. perfoliatum
                                             Silphium perplexum
                                             Silphium pinnatifidum
                                             Silphium radula
                                               Silphium radula var. gracile
                                               Silphium radula var. radula
                                                     [Silphium simpsonii var. wrightii]
                                             Silphium reverchonii
                                             Silphium rumicifolium
                                             Silphium scaberrimum
                                             Silphium scabrum
                                             Silphium simpsonii
                                             Silphium terebinthinaceum
                                               Silphium terebinthinaceum var. pinnatifidum
                                               Silphium terebinthinaceum var. terebinthinaceum
                                                     [Silphium terebinthinaceum var. luciae-brauniae]
                                             Silphium trifoliatum
                                             Silphium trilobatum
                                             Silphium wasiotense
                                     Silybum
                                             Silybum eburneum
                                             Silybum marianum
                                                   [Mariana mariana]
                                     Simsia
                                             Simsia calva
                                             Simsia lagasceiformis
                                                   [Simsia exaristata var. perplexa]
                                                   [Simsia exaristata]
                                     Sinosenecio
                                             Sinosenecio newcombei
                                     Sitilias
                                     Smallanthus
                                             Smallanthus uvedalia
                                                   [Osteospermum uvedalia]
                                                   [Polymnia uvedalia var. densipilis]
                                                   [Polymnia uvedalia var. floridana]
                                                   [Polymnia uvedalia]
                                                   [Smallanthus uvedalius]
                                     Solidago
                                           [X Solidaster]
                                             Solidago X asperula
                                             Solidago X bartramiana
                                                   [Solidago bartramiana]
                                                   [Solidago canadensis var. bartramiana]
                                             Solidago X beaudryi
                                             Solidago X bernardii
                                                   [Oligoneuron X bernardii]
                                             Solidago X calcicola
                                                   [Solidago calcicola]
                                             Solidago X erskinei
                                             Solidago X lutescens
                                                   [Aster lutescens]
                                                   [Aster ptarmicoides var. lutescens]
                                                   [Diplopappus lutescens]
                                                   [Oligoneuron X lutescens]
                                                   [Unamia lutescens]
                                             Solidago X luteus
                                                   [Aster hybridus var. luteus]
                                                   [Asterago lutea]
                                                   [Solidaster X luteus]
                                                   [Solidaster luteus]
                                             Solidago X maheuxii
                                                   [Oligoneuron X maheuxii]
                                             Solidago X neurolepis
                                                   [Solidago arguta var. neurolepis]
                                                   [Solidago neurolepis]
                                             Solidago X ovata
                                             Solidago X raymondii
                                             Solidago X ulmicaesia
                                             Solidago aestivalis
                                             Solidago albopilosa
                                             Solidago altiplanities
                                             Solidago altissima
                                                   [Solidago altissima var. pluricephala]
                                                   [Solidago altissima var. procera]
                                                   [Solidago hirsutissima]
                                                   [Solidago lunellii]
                                               Solidago altissima ssp. altissima
                                                     [Solidago altissima var. altissima]
                                               Solidago altissima ssp. gilvocanescens
                                                     [Solidago altissima var. gilvocanescens]
                                             Solidago angustifolia
                                             Solidago anticostensis
                                             Solidago arenicola
                                             Solidago arguta
                                               Solidago arguta ssp. arguta
                                               Solidago arguta var. arguta
                                               Solidago arguta var. harrisii
                                               Solidago arguta ssp. boottii
                                               Solidago arguta ssp. caroliniana
                                               Solidago arguta var. boottii
                                               Solidago arguta var. caroliniana
                                               Solidago arguta ssp. pseudoyadkinensis
                                             Solidago aspera
                                             Solidago auriculata
                                                   [Solidago amplexicaulis]
                                                   [Solidago notabilis]
                                             Solidago austrina
                                             Solidago axillaris
                                             Solidago bicolor
                                                   [Solidago curtisii var. pubens]
                                                   [Solidago pubens]
                                             Solidago boothii
                                             Solidago boottii
                                               Solidago boottii var. caroliniana
                                             Solidago brachyphylla
                                                   [Solidago boothii var. brachyphylla]
                                                   [Solidago boottii var. brachyphylla]
                                             Solidago buckleyi
                                             Solidago caesia
                                               Solidago caesia var. caesia
                                                     [Solidago caesia var. axillaris]
                                                     [Solidago caesia var. paniculata]
                                               Solidago caesia var. zedia
                                             Solidago canadensis
                                               Solidago canadensis ssp. salebrosa
                                               Solidago canadensis var. canadensis
                                               Solidago canadensis var. gilvocanescens
                                               Solidago canadensis var. hargeri
                                               Solidago canadensis var. salebrosa
                                               Solidago canadensis var. scabra
                                             Solidago canescens
                                             Solidago capulinensis
                                             Solidago celtidifolia
                                             Solidago chapmanii
                                             Solidago chlorolepis
                                             Solidago conferta
                                             Solidago confinis
                                                   [Solidago spectabilis var. confinis]
                                             Solidago corymbosa
                                             Solidago curtisii
                                                   [Solidago caesia var. curtisii]
                                               Solidago curtisii var. curtisii
                                                     [Solidago caesia var. hispida]
                                               Solidago curtisii var. flaccidifolia
                                             Solidago deamii
                                             Solidago delicatula
                                                   [Solidago helleri]
                                                   [Solidago ulmifolia var. microphylla]
                                             Solidago discoidea
                                             Solidago dispersa
                                             Solidago drummondii
                                                   [Aster torreyi]
                                             Solidago elongata
                                                   [Solidago canadensis ssp. elongata]
                                                   [Solidago canadensis var. elongata]
                                                   [Solidago lepida var. elongata]
                                             Solidago erecta
                                                   [Solidago porteri]
                                                   [Solidago speciosa var. erecta]
                                             Solidago faucibus
                                             Solidago fistulosa
                                             Solidago flaccidifolia
                                             Solidago flavovirens
                                             Solidago flexicaulis
                                                   [Solidago latifolia]
                                             Solidago gattingeri
                                             Solidago gigantea
                                                   [Aster latissimifolius var. serotinus]
                                                   [Solidago X leiophallax]
                                                   [Solidago dumetorum]
                                                   [Solidago gigantea ssp. serotina]
                                                   [Solidago gigantea var. leiophylla]
                                                   [Solidago gigantea var. pitcheri]
                                                   [Solidago gigantea var. serotina]
                                                   [Solidago gigantea var. shinnersii]
                                                   [Solidago pitcheri]
                                                   [Solidago serotina]
                                                   [Solidago serotinoides]
                                             Solidago gillmanii
                                             Solidago gilvocanescens
                                             Solidago glomerata
                                             Solidago gracilis
                                             Solidago gracillima
                                             Solidago grandiflora
                                             Solidago guiradonis
                                             Solidago harperi
                                             Solidago harrisii
                                             Solidago hispida
                                                   [Solidago bicolor var. concolor]
                                                   [Solidago bicolor var. lanata]
                                                   [Solidago bicolor var. ovalis]
                                                   [Solidago bicolor var. tonsa]
                                                   [Solidago hispida var. arnoglossa]
                                                   [Solidago hispida var. hispida]
                                                   [Solidago hispida var. lanata]
                                                   [Solidago hispida var. tonsa]
                                             Solidago houghtonii
                                                   [Oligoneuron houghtonii]
                                             Solidago jacksonii
                                             Solidago jejunifolia
                                             Solidago juliae
                                                   [Solidago altissima var. canescens]
                                                   [Solidago canadensis var. canescens]
                                             Solidago juncea
                                                   [Solidago juncea var. juncea]
                                                   [Solidago juncea var. neobohemica]
                                                   [Solidago juncea var. ramosa]
                                             Solidago kralii
                                             Solidago lancifolia
                                             Solidago lateriflora
                                             Solidago latissimifolia
                                                   [Solidago edisoniana]
                                                   [Solidago elliottii var. ascendens]
                                                   [Solidago elliottii var. edisoniana]
                                                   [Solidago elliottii var. pedicellata]
                                                   [Solidago elliottii]
                                                   [Solidago elliptica]
                                                   [Solidago mirabilis]
                                             Solidago leavenworthii
                                             Solidago leiocarpa
                                                   [Solidago cutleri]
                                             Solidago lepida
                                                   [Solidago canadensis var. lepida]
                                                   [Solidago canadensis var. subserrata]
                                               Solidago lepida ssp. fallax
                                                     [Solidago lepida var. fallax]
                                                     [Solidago lepida var. molina]
                                               Solidago lepida ssp. lepida
                                               Solidago lepida var. lepida
                                               Solidago lepida var. salebrosa
                                             Solidago ludoviciana
                                                   [Solidago arguta var. strigosa]
                                                   [Solidago boothii var. ludoviciana]
                                                   [Solidago boottii var. ludoviciana]
                                                   [Solidago strigosa]
                                             Solidago macrophylla
                                                   [Solidago macrophylla var. thyrsoidea]
                                                   [Solidago mensalis]
                                             Solidago mexicana
                                             Solidago missouriensis
                                                   [Solidago glaberrima var. moritura]
                                                   [Solidago glaberrima]
                                                   [Solidago missouriensis var. extraria]
                                                   [Solidago missouriensis var. fasciculata]
                                                   [Solidago missouriensis var. glaberrima]
                                                   [Solidago missouriensis var. missouriensis]
                                                   [Solidago missouriensis var. montana]
                                                   [Solidago missouriensis var. tenuissima]
                                                   [Solidago missouriensis var. tolmieana]
                                                   [Solidago tenuissima]
                                             Solidago mollis
                                                   [Solidago mollis var. angustata]
                                                   [Solidago mollis var. mollis]
                                             Solidago multiradiata
                                                   [Solidago ciliosa]
                                                   [Solidago multiradiata ssp. scopulorum]
                                                   [Solidago multiradiata var. arctica]
                                                   [Solidago multiradiata var. multiradiata]
                                                   [Solidago multiradiata var. parviceps]
                                                   [Solidago multiradiata var. scopulorum]
                                                   [Solidago scopulorum]
                                                   [Solidago virgauera var. arctica]
                                               Solidago multiradiata var. scopulorum
                                             Solidago nana
                                             Solidago nemoralis
                                               Solidago nemoralis ssp. decemflora
                                                     [Solidago decemflora]
                                                     [Solidago longipetiolata]
                                                     [Solidago nemoralis ssp. longipetiolata]
                                                     [Solidago nemoralis var. decemflora]
                                                     [Solidago nemoralis var. longipetiolata]
                                                     [Solidago pulcherrima]
                                               Solidago nemoralis ssp. nemoralis
                                                     [Solidago nemoralis ssp. haleana]
                                                     [Solidago nemoralis var. haleana]
                                                     [Solidago nemoralis var. nemoralis]
                                               Solidago nemoralis var. longipetiolata
                                             Solidago nitida
                                                   [Oligoneuron nitidum]
                                             Solidago odora
                                               Solidago odora ssp. chapmanii
                                                     [Solidago odora var. chapmanii]
                                               Solidago odora ssp. odora
                                                     [Solidago odora var. odora]
                                             Solidago ohioensis
                                                   [Aster ohioensis]
                                                   [Oligoneuron ohioense]
                                             Solidago ouachitensis
                                             Solidago parvirigida
                                             Solidago patula
                                               Solidago patula ssp. patula
                                                     [Solidago patula var. patula]
                                               Solidago patula ssp. strictula
                                                     [Solidago patula var. strictula]
                                             Solidago pauciflosculosa
                                             Solidago perlonga
                                             Solidago petiolaris
                                                   [Solidago angusta]
                                                   [Solidago lindheimeriana]
                                                   [Solidago milleriana]
                                                   [Solidago petiolaris var. angusta]
                                                   [Solidago petiolaris var. petiolaris]
                                                   [Solidago petiolaris var. wardii]
                                                   [Solidago wardii]
                                             Solidago petiolata
                                             Solidago pinetorum
                                             Solidago plumosa
                                             Solidago pruinosa
                                             Solidago ptarmicoides
                                                   [Aster ptarmicoides var. georgianus]
                                                   [Aster ptarmicoides]
                                                   [Doellingeria ptarmicoides]
                                                   [Inula alba]
                                                   [Oligoneuron album]
                                                   [Solidago asteroides]
                                                   [Unamia alba]
                                             Solidago puberula
                                               Solidago puberula ssp. puberula
                                                     [Solidago puberula var. puberula]
                                               Solidago puberula ssp. pulverulenta
                                                     [Solidago puberula var. pulverulenta]
                                             Solidago pulchra
                                             Solidago pulverulenta
                                             Solidago racemosa
                                             Solidago radula
                                                   [Aster decemflora]
                                                   [Solidago pendula]
                                                   [Solidago radula var. laeta]
                                                   [Solidago radula var. radula]
                                                   [Solidago radula var. stenolepis]
                                                   [Solidago rotundifolia]
                                                   [Solidago scaberrima]
                                             Solidago randii
                                             Solidago riddellii
                                                   [Oligoneuron riddellii]
                                             Solidago rigida
                                                   [Oligoneuron rigidum]
                                               Solidago rigida ssp. glabrata
                                                     [Solidago rigida var. glabrata]
                                                     [Solidago rigida var. laevicaulis]
                                               Solidago rigida ssp. humilis
                                                     [Oligoneuron corymbosum var. humile]
                                                     [Solidago jacksonii var. humilis]
                                                     [Solidago rigida var. humilis]
                                               Solidago rigida ssp. rigida
                                             Solidago rigidiuscula
                                             Solidago roanensis
                                                   [Solidago maxonii]
                                                   [Solidago monticola]
                                                   [Solidago roanensis var. monticola]
                                             Solidago rugosa
                                               Solidago rugosa ssp. aspera
                                                     [Solidago rugosa var. celtidifolia]
                                               Solidago rugosa var. cronquistiana
                                               Solidago rugosa ssp. rugosa
                                               Solidago rugosa var. rugosa
                                               Solidago rugosa var. sphagnophila
                                             Solidago rupestris
                                                   [Solidago canadensis var. rupestris]
                                             Solidago salicina
                                             Solidago scabra
                                             Solidago sciaphila
                                             Solidago sempervirens
                                               Solidago sempervirens ssp. mexicana
                                                     [Solidago sempervirens var. mexicana]
                                               Solidago sempervirens ssp. sempervirens
                                                     [Solidago sempervirens var. sempervirens]
                                             Solidago shortii
                                             Solidago simplex
                                               Solidago simplex ssp. randii
                                               Solidago simplex var. gillmanii
                                                     [Solidago glutinosa var. gillmanii]
                                                     [Solidago racemosa var. gillmanii]
                                               Solidago simplex var. monticola
                                                     [Solidago randii var. monticola]
                                               Solidago simplex var. ontarioensis
                                                     [Solidago glutinosa var. ontarioensis]
                                               Solidago simplex var. racemosa
                                                     [Solidago glutinosa var. racemosa]
                                               Solidago simplex var. randii
                                                     [Solidago glutinosa ssp. randii]
                                               Solidago simplex ssp. simplex
                                               Solidago simplex var. chlorolepis
                                                     [Solidago decumbens var. chlorolepis]
                                                     [Solidago glutinosa var. chlorolepis]
                                               Solidago simplex var. nana
                                                     [Solidago bellidifolia]
                                                     [Solidago glutinosa var. nana]
                                                     [Solidago spathulata var. nana]
                                               Solidago simplex var. simplex
                                                     [Solidago decumbens var. oreophila]
                                                     [Solidago decumbens]
                                                     [Solidago glutinosa]
                                                     [Solidago neomexicana]
                                                     [Solidago oreophila]
                                                     [Solidago spathulata ssp. glutinosa]
                                                     [Solidago spathulata var. neomexicana]
                                             Solidago spathulata
                                                   [Solidago spathulata ssp. spathulata]
                                                   [Solidago spathulata var. spathulata]
                                               Solidago spathulata ssp. randii
                                               Solidago spathulata var. gillmanii
                                               Solidago spathulata var. nana
                                               Solidago spathulata var. neomexicana
                                               Solidago spathulata var. racemosa
                                             Solidago speciosa
                                               Solidago speciosa ssp. pallida
                                               Solidago speciosa ssp. speciosa
                                               Solidago speciosa var. rigidiuscula
                                               Solidago speciosa var. speciosa
                                                     [Solidago uliginosa var. jejunifolia]
                                               Solidago speciosa var. angustata
                                               Solidago speciosa var. jejunifolia
                                               Solidago speciosa var. pallida
                                                     [Solidago pallida]
                                             Solidago spectabilis
                                               Solidago spectabilis var. spectabilis
                                             Solidago sphacelata
                                                   [Brachychaeta sphacelata]
                                             Solidago spithamaea
                                             Solidago squarrosa
                                             Solidago stricta
                                               Solidago stricta ssp. gracillima
                                               Solidago stricta ssp. stricta
                                             Solidago suaveolens
                                             Solidago tarda
                                             Solidago tortifolia
                                             Solidago uliginosa
                                                   [Aster uliginosus]
                                                   [Felicia uliginosa]
                                                   [Solidago chrysolepis]
                                                   [Solidago farwellii]
                                                   [Solidago neglecta]
                                                   [Solidago purshii]
                                                   [Solidago simulans]
                                                   [Solidago uliginosa var. levipes]
                                                   [Solidago uliginosa var. linoides]
                                                   [Solidago uliginosa var. neglecta]
                                                   [Solidago uliginosa var. peracuta]
                                                   [Solidago uliginosa var. terrae-novae]
                                                   [Solidago uliginosa var. uliginosa]
                                                   [Solidago uniligulata var. levipes]
                                                   [Solidago uniligulata]
                                             Solidago ulmifolia
                                               Solidago ulmifolia var. palmeri
                                               Solidago ulmifolia var. ulmifolia
                                             Solidago velutina
                                               Solidago velutina ssp. califonica
                                                     [Solidago californica]
                                               Solidago velutina ssp. sparsiflora
                                                     [Solidago arizonica]
                                                     [Solidago californica var. nevadensis]
                                                     [Solidago canadensis var. arizonica]
                                                     [Solidago howellii]
                                                     [Solidago howelllii]
                                                     [Solidago sparsiflora]
                                                     [Solidago spathulata var. subcinerea]
                                                     [Solidago trinervata]
                                                     [Solidago velutina var. nevadensis]
                                               Solidago velutina ssp. velutina
                                             Solidago verna
                                             Solidago victorinii
                                             Solidago villosicarpa
                                             Solidago virgauera
                                             Solidago wrightii
                                                   [Solidago bigelovii var. wrightii]
                                                   [Solidago bigelovii]
                                                   [Solidago wrightii var. adenophora]
                                                   [Solidago wrightii var. wrightii]
                                                   Solidago wrightii var. adenophora
                                             Solidago yadkinensis
                                     Solidaster
                                     Soliva
                                           [Gymnostyles]
                                             Soliva anthemifolia
                                                   [Gymnostyles anthemidifolia]
                                                   [Gymnostyles anthemifolia]
                                                   [Soliva mutisii]
                                             Soliva sessilis
                                                   [Soliva daucifolia]
                                                   [Soliva pterosperma]
                                             Soliva stolonifera
                                                   [Gymnostyles nasturtiifolia]
                                                   [Gymnostyles stolonifera]
                                                   [Soliva nasturtiifolia]
                                     Sonchus
                                             Sonchus arvensis
                                               Sonchus arvensis ssp. arvensis
                                                     [Sonchus arvensis var. shumovichii]
                                               Sonchus arvensis ssp. uliginosus
                                                     [Sonchus arvensis var. glabrescens]
                                                     [Sonchus uliginosus]
                                             Sonchus asper
                                                   [Sonchus asper ssp. asper]
                                                   [Sonchus asper ssp. glaucescens]
                                                   [Sonchus nymanii]
                                             Sonchus oleraceus
                                             Sonchus palustris
                                             Sonchus tataricus
                                             Sonchus tenerrimus
                                             Sonchus uliginosus
                                     Sparganophorus
                                             Sparganophorus sparganophora
                                                   [Ethulia sparganophora]
                                                   [Struchium sparganophorum]
                                     Sphaeromeria
                                             Sphaeromeria argentea
                                                   [Tanacetum nuttallii]
                                             Sphaeromeria cana
                                                   [Tanacetum canum]
                                             Sphaeromeria capitata
                                                   [Tanacetum capitatum]
                                             Sphaeromeria compacta
                                                   [Tanacetum compactum]
                                             Sphaeromeria diversifolia
                                                   [Tanacetum diversifolium]
                                             Sphaeromeria potentilloides
                                               Sphaeromeria potentilloides var. nitrophila
                                                     [Tanacetum potentilloides var. nitrophilum]
                                                     [Vesicarpa potentilloides var. nitrophilum]
                                               Sphaeromeria potentilloides var. potentilloides
                                                     [Vesicarpa potentilloides var. potentilloides]
                                                     [Vesicarpa potentilloides]
                                             Sphaeromeria ruthiae
                                             Sphaeromeria simplex
                                                   [Tanacetum simplex]
                                     Sphagneticola
                                           [Complaya]
                                           [Thelechitonia]
                                             Sphagneticola gracilis
                                                   [Complaya gracilis]
                                                   [Thelechitonia gracilis]
                                             Sphagneticola trilobata
                                                   [Complaya trilobata]
                                                   [Thelechitonia trilobata]
                                     Spilanthes
                                             Spilanthes acmella
                                             Spilanthes oleracea
                                             Spilanthes urens
                                     Spiracantha
                                             Spiracantha cornifolia
                                     Starkea
                                     Stebbinsoseris
                                             Stebbinsoseris decipiens
                                             Stebbinsoseris heterocarpa
                                     Stemmodontia
                                     Stenactis
                                             Stenactis strigosa
                                     Stenotopsis
                                     Stenotus
                                             Stenotus acaulis
                                                   [Haplopappus acaulis ssp. typicus]
                                                   [Haplopappus acaulis var. glabratus]
                                                   [Haplopappus acaulis]
                                                   [Stenotus acaulis var. acaulis]
                                                   [Stenotus acaulis var. glabratus]
                                             Stenotus andersonii
                                             Stenotus armerioides
                                               Stenotus armerioides var. armerioides
                                                     [Haplopappus armerioides]
                                               Stenotus armerioides var. gramineus
                                                     [Haplopappus armerioides var. gramineus]
                                             Stenotus borealis
                                             Stenotus lanuginosus
                                                   [Haplopappus lanuginosus ssp. typicus]
                                                   [Haplopappus lanuginosus]
                                               Stenotus lanuginosus var. andersonii
                                                     [Haplopappus lanuginosus ssp. andersonii]
                                                     [Haplopappus lanuginosus var. andersonii]
                                               Stenotus lanuginosus var. lanuginosus
                                             Stenotus macleanii
                                             Stenotus stenophyllus
                                     Stephanomeria
                                             Stephanomeria blairii
                                             Stephanomeria cichoriacea
                                             Stephanomeria diegensis
                                             Stephanomeria elata
                                             Stephanomeria exigua
                                               Stephanomeria exigua ssp. carotifera
                                                     [Stephanomeria carotifera]
                                               Stephanomeria exigua ssp. coronaria
                                                     [Stephanomeria coronaria]
                                                     [Stephanomeria exigua var. coronaria]
                                               Stephanomeria exigua ssp. deanei
                                                     [Stephanomeria exigua var. deanei]
                                               Stephanomeria exigua ssp. exigua
                                                     [Lygodesmia bigelovii]
                                                     [Stephanomeria exigua ssp. pentachaeta]
                                                     [Stephanomeria exigua var. pentachaeta]
                                                     [Stephanomeria schottii]
                                               Stephanomeria exigua ssp. macrocarpa
                                             Stephanomeria fluminea
                                             Stephanomeria lactucina
                                             Stephanomeria malheurensis
                                             Stephanomeria paniculata
                                             Stephanomeria parryi
                                             Stephanomeria pauciflora
                                                   [Lygodesmia pauciflora]
                                                   [Ptiloria pauciflora]
                                                   [Stephanomeria cinerea]
                                                   [Stephanomeria lygodesmioides]
                                                   [Stephanomeria lygodesmoides]
                                                   [Stephanomeria neomexicana]
                                                   [Stephanomeria pauciflora var. parishii]
                                                   [Stephanomeria pauciflora var. pauciflora]
                                             Stephanomeria runcinata
                                                   [Ptiloria ramosa]
                                             Stephanomeria spinosa
                                             Stephanomeria tenuifolia
                                                   [Lygodesmia tenuifolia]
                                                   [Lygodesmia wrightii]
                                                   [Stephanomeria minor var. minor]
                                                   [Stephanomeria minor var. myrioclada]
                                                   [Stephanomeria minor var. uintaensis]
                                                   [Stephanomeria minor var. uintensis]
                                                   [Stephanomeria minor]
                                                   [Stephanomeria myrioclada]
                                                   [Stephanomeria tenuifolia var. myrioclada]
                                                   [Stephanomeria tenuifolia var. tenuifolia]
                                                   [Stephanomeria tenuifolia var. uintaensis]
                                                   [Stephanomeria tenuifolia var. uintensis]
                                                   [Stephanomeria wrightii]
                                             Stephanomeria thurberi
                                                   [Lygodesmia thurberi]
                                             Stephanomeria virgata
                                               Stephanomeria virgata ssp. pleurocarpa
                                               Stephanomeria virgata ssp. virgata
                                                     [Stephanomeria virgata var. tomentosa]
                                             Stephanomeria wrightii
                                     Stevia
                                             Stevia lemmonii
                                             Stevia micrantha
                                             Stevia ovata
                                               Stevia ovata var. ovata
                                               Stevia ovata var. texana
                                             Stevia plummerae
                                               Stevia plummerae var. plummerae
                                                     [Stevia plummerae var. alba]
                                             Stevia rebaudiana
                                             Stevia rhombifolia
                                             Stevia salicifolia
                                                   [Stevia salicifolia var. stenophylla]
                                                   [Stevia stenophylla]
                                             Stevia serrata
                                                   [Stevia serrata var. haplopappa]
                                                   [Stevia serrata var. ivifolia]
                                             Stevia viscida
                                     Stokesia
                                             Stokesia laevis
                                     Struchium
                                     Stylocline
                                             Stylocline acaulis
                                             Stylocline citroleum
                                             Stylocline gnaphaloides
                                                   [Stylocline gnaphalioides]
                                             Stylocline intertexta
                                             Stylocline masonii
                                             Stylocline micropoides
                                             Stylocline psilocarphoides
                                             Stylocline sonorensis
                                     Stylopappus
                                     Symphyotrichum
                                           [Brachyactis]
                                             Symphyotrichum X amethystinum
                                                   [Aster X amethystinus]
                                                   [Aster amethystinus]
                                                   [Lasallea X amethystina]
                                                   [Virgulus X amethystinus]
                                             Symphyotrichum X batesii
                                                   [Aster X batesii]
                                                   [Aster batesii]
                                             Symphyotrichum X columbianum
                                                   [Aster X columbianus]
                                                   [Aster columbianus]
                                             Symphyotrichum X finkii
                                                   [Aster finkii]
                                             Symphyotrichum X gravesii
                                                   [Aster X gravesii]
                                                   [Aster gravesii]
                                             Symphyotrichum X longulum
                                                   [Aster X longulus]
                                                   [Aster longulus]
                                             Symphyotrichum X salignum
                                                   [Aster X salignus]
                                             Symphyotrichum X schistosum
                                                   [Aster X schistosus]
                                                   [Aster schistosus]
                                             Symphyotrichum X subgeminatum
                                                   [Aster subgeminatus]
                                                   [Symphyotrichum subgeminatum]
                                             Symphyotrichum X tardiflorum
                                                   [Aster X tardiflorus]
                                                   [Aster novi-belgii ssp. tardiflorus]
                                                   [Aster novi-belgii var. tardiflorus]
                                                   [Aster tardiflorus var. vestitus]
                                                   [Aster tardiflorus]
                                                   [Symphyotrichum novi-belgii var. tardiflorum]
                                                   [Symphyotrichum tardiflorum]
                                             Symphyotrichum X versicolor
                                                   [Aster X versicolor]
                                             Symphyotrichum X woldenii
                                                   [Aster X woldenii]
                                                   [Aster woldenii]
                                             Symphyotrichum adnatum
                                                   [Aster adnatus]
                                                   [Lasallea adnata]
                                                   [Virgulus adnatus]
                                             Symphyotrichum anomalum
                                                   [Aster anomalus]
                                             Symphyotrichum anticostense
                                                   [Aster anticostensis]
                                                   [Aster gaspensis]
                                             Symphyotrichum ascendens
                                                   [Aster adscendens]
                                                   [Aster ascendens]
                                                   [Aster chilensis ssp. adscendens]
                                                   [Aster macounii]
                                                   [Aster subgriseus]
                                                   [Virgulaster ascendens]
                                             Symphyotrichum bahamense
                                             Symphyotrichum boreale
                                                   [Aster borealis]
                                                   [Aster franklinianus]
                                                   [Aster junciformis]
                                                   [Aster laxifolius var. borealis]
                                             Symphyotrichum bracei
                                             Symphyotrichum campestre
                                                   [Aster bloomeri]
                                                   [Aster campestris var. bloomeri]
                                                   [Aster campestris var. campestris]
                                                   [Aster campestris]
                                                   [Symphyotrichum campestre var. bloomeri]
                                                   [Symphyotrichum campestre var. campestre]
                                                   [Virgulus campestris]
                                             Symphyotrichum chapmanii
                                                   [Aster chapmanii]
                                                   [Eurybia chapmanii]
                                             Symphyotrichum chilense
                                                   [Aster chilensis var. chilensis]
                                                   [Aster chilensis var. invenustus]
                                                   [Aster chilensis var. medius]
                                                   [Aster chilensis]
                                                   [Aster invenustus]
                                                   [Symphyotrichum chilense var. chilense]
                                                   [Symphyotrichum chilense var. invenustum]
                                                   [Symphyotrichum chilense var. medium]
                                             Symphyotrichum ciliatum
                                                   [Aster brachyactis]
                                                   [Brachyactis angusta]
                                                   [Brachyactis ciliata ssp. laurentiana]
                                                   [Brachyactis ciliata]
                                                   [Tripolium angustum]
                                             Symphyotrichum ciliolatum
                                                   [Aster ciliolatus var. ciliolatus]
                                                   [Aster ciliolatus var. comatus]
                                                   [Aster ciliolatus var. wilsonii]
                                                   [Aster ciliolatus]
                                                   [Aster foliaceus var. subgeminatus]
                                                   [Aster lindleyanus]
                                                   [Aster saundersii]
                                                   [Aster wilsonii]
                                                   [Symphyotrichum ciliolatum var. comatum]
                                                   [Symphyotrichum ciliolatum var. wilsonii]
                                             Symphyotrichum concolor
                                                   [Aster concolor]
                                                   [Lasallea concolor]
                                                   [Virgulus concolor]
                                               Symphyotrichum concolor var. concolor
                                                     [Aster concolor var. simulatus]
                                               Symphyotrichum concolor var. devestitum
                                             Symphyotrichum cordifolium
                                                   [Aster cordifolius ssp. laevigatus]
                                                   [Aster cordifolius ssp. sagittifolius]
                                                   [Aster cordifolius var. cordifolius]
                                                   [Aster cordifolius var. furbishiae]
                                                   [Aster cordifolius var. incisus]
                                                   [Aster cordifolius var. laevigatus]
                                                   [Aster cordifolius var. lanceolatus]
                                                   [Aster cordifolius var. morantus]
                                                   [Aster cordifolius var. moratus]
                                                   [Aster cordifolius var. polycephalus]
                                                   [Aster cordifolius var. racemiflorus]
                                                   [Aster cordifolius var. sagittifolius]
                                                   [Aster cordifolius]
                                                   [Aster finkii var. moratus]
                                                   [Aster lowrieanus var. incisus]
                                                   [Aster lowrieanus var. lanceolatus]
                                                   [Aster lowrieanus]
                                                   [Aster plumarius]
                                                   [Symphyotrichum cordifolium var. furbishiae]
                                                   [Symphyotrichum cordifolium var. lanceolatum]
                                                   [Symphyotrichum cordifolium var. moratum]
                                                   [Symphyotrichum cordifolium var. polycephalum]
                                                   [Symphyotrichum cordifolium var. racemiflorum]
                                                   [Symphyotrichum lowrieanum]
                                                   [Symphyotrichum sagittifolium]
                                             Symphyotrichum crenifolium
                                             Symphyotrichum cusickii
                                                   [Aster cusickii]
                                                   [Aster foliaceus var. cusickii]
                                             Symphyotrichum defoliatum
                                                   [Aster bernardinus]
                                                   [Aster defoliatus]
                                                   [Aster deserticola]
                                                   [Virgulaster bernardinus]
                                             Symphyotrichum depauperatum
                                                   [Aster depauperatus]
                                                   [Aster ericoides var. pusillus]
                                                   [Aster pilosus var. pusillus]
                                             Symphyotrichum divaricatum
                                             Symphyotrichum drummondii
                                               Symphyotrichum drummondii var. drummondii
                                                     [Aster drummondii var. drummondii]
                                                     [Aster sagittifolius var. drummondii]
                                               Symphyotrichum drummondii var. texanum
                                                     [Aster drummondii ssp. parviceps]
                                                     [Aster drummondii ssp. texanus]
                                                     [Aster drummondii var. parviceps]
                                                     [Aster drummondii var. texanus]
                                                     [Aster texanus var. parviceps]
                                                     [Symphyotrichum drummondii var. parviceps]
                                             Symphyotrichum dumosum
                                                   [Aster brachypholis]
                                               Symphyotrichum dumosum var. dumosum
                                                     [Aster dumosus var. cordidifolius]
                                                     [Aster dumosus var. coridifolius]
                                                     [Aster dumosus var. dumosus]
                                                     [Aster dumosus var. gracilentus]
                                               Symphyotrichum dumosum var. gracilipes
                                                     [Aster dumosus var. gracilipes]
                                               Symphyotrichum dumosum var. pergracile
                                                     [Aster dumosus var. pergracilis]
                                               Symphyotrichum dumosum var. strictior
                                                     [Aster dumosus var. dodgei]
                                                     [Aster dumosus var. strictior]
                                                     [Symphyotrichum dumosum var. dodgei]
                                               Symphyotrichum dumosum var. subulifolium
                                                     [Aster dumosus var. subulifolius]
                                             Symphyotrichum eatonii
                                                   [Aster bracteolatus]
                                                   [Aster cordalenus]
                                                   [Aster eatonii]
                                                   [Aster foliaceus var. eatonii]
                                                   [Aster mearnsii]
                                                   [Aster oregonus]
                                                   [Symphyotrichum bracteolatum]
                                             Symphyotrichum elliotii
                                                   [Aster elliotti]
                                                   [Aster elliottii]
                                                   [Aster puniceus ssp. elliottii]
                                                   [Aster puniceus var. elliottii]
                                             Symphyotrichum ericoides
                                                   [Aster ericoides]
                                               Symphyotrichum ericoides var. ericoides
                                                     [Aster ericoides var. ericoides]
                                                     [Aster ericoides var. prostratus]
                                                     [Aster multiflorus var. exiguus]
                                                     [Aster multiflorus var. prostratus]
                                                     [Lasallea ericoides]
                                                     [Symphyotrichum ericoides var. prostratum]
                                               Symphyotrichum ericoides var. pansum
                                                     [Aster ericoides ssp. pansus]
                                                     [Aster ericoides var. pansus]
                                                     [Aster ericoides var. stricticaulis]
                                                     [Aster multiflorus var. pansus]
                                                     [Aster multiflorus var. stricticaulis]
                                                     [Symphyotrichum ericoides var. stricticaule]
                                             Symphyotrichum eulae
                                                   [Aster eulae]
                                             Symphyotrichum expansum
                                             Symphyotrichum falcatum
                                                   [Aster falcatus]
                                               Symphyotrichum falcatum var. commutatum
                                                     [Aster commutatus var. crassulus]
                                                     [Aster commutatus var. polycephalus]
                                                     [Aster falcatus ssp. commutatus]
                                                     [Aster falcatus var. commutatus]
                                                     [Aster falcatus var. crassulus]
                                                     [Aster multiflorus var. commutatus]
                                                     [Symphyotrichum falcatum var. crassulum]
                                               Symphyotrichum falcatum var. falcatum
                                                     [Aster falcatus var. falcatus]
                                                     [Lasallea falcata]
                                             Symphyotrichum fendleri
                                                   [Aster fendleri]
                                                   [Virgulus fendleri]
                                             Symphyotrichum firmum
                                                   [Aster firmus]
                                                   [Aster lucidulus]
                                                   [Aster puniceus ssp. firmus]
                                                   [Aster puniceus var. firmus]
                                                   [Aster puniceus var. lucidulus]
                                             Symphyotrichum foliaceum
                                               Symphyotrichum foliaceum var. apricum
                                                     [Aster subspicatus var. apricus]
                                               Symphyotrichum foliaceum var. canbyi
                                               Symphyotrichum foliaceum var. foliaceum
                                               Symphyotrichum foliaceum var. parryi
                                                     [Aster ascendens var. parryi]
                                             Symphyotrichum fontinale
                                                   [Aster fontinalis]
                                                   [Aster patens var. floridanus]
                                             Symphyotrichum frondosum
                                                   [Aster frondosus]
                                                   [Brachyactis frondosa]
                                                   [Tripolium frondosum]
                                             Symphyotrichum georgianum
                                                   [Aster georgianus]
                                                   [Aster patens var. georgianus]
                                                   [Virgulus georgianus]
                                                   [Virgulus patens var. georgianus]
                                             Symphyotrichum grandiflorum
                                                   [Aster grandiflorus]
                                                   [Lasallea grandiflora]
                                                   [Virgulus grandiflorus]
                                             Symphyotrichum greatae
                                                   [Aster greatae]
                                             Symphyotrichum hallii
                                                   [Aster chilensis ssp. hallii]
                                                   [Aster hallii]
                                             Symphyotrichum hendersonii
                                                   [Aster cusickii var. lyallii]
                                                   [Aster foliaceus var. lyallii]
                                                   [Aster hendersonii]
                                             Symphyotrichum hesperium
                                             Symphyotrichum jessicae
                                                   [Aster jessicae]
                                             Symphyotrichum kralii
                                                   [Aster pinifolius]
                                             Symphyotrichum laeve
                                                   [Aster laevis]
                                               Symphyotrichum laeve var. concinnum
                                               Symphyotrichum laeve var. geyeri
                                               Symphyotrichum laeve var. laeve
                                               Symphyotrichum laeve var. purpuratum
                                             Symphyotrichum lanceolatum
                                                   [Aster lanceolatus]
                                               Symphyotrichum lanceolatum ssp. hesperium
                                               Symphyotrichum lanceolatum var. hesperium
                                               Symphyotrichum lanceolatum ssp. lanceolatum
                                                     [Aster lanceolatus ssp. lanceolatus]
                                               Symphyotrichum lanceolatum var. hirsuticaule
                                               Symphyotrichum lanceolatum var. interior
                                               Symphyotrichum lanceolatum var. lanceolatum
                                               Symphyotrichum lanceolatum var. latifolium
                                               Symphyotrichum lanceolatum var. hirsuiticaule
                                             Symphyotrichum lateriflorum
                                                   [Aster lateriflorus]
                                               Symphyotrichum lateriflorum var. angustifolium
                                                     [Aster lateriflorus var. angustifolius]
                                               Symphyotrichum lateriflorum var. flagellare
                                                     [Aster lateriflorus var. flagellaris]
                                                     [Aster lateriflorus var. inductus]
                                                     [Aster lateriflorus var. indutus]
                                               Symphyotrichum lateriflorum var. horizontale
                                                     [Aster lateriflorus var. horizontalis]
                                                     [Aster lateriflorus var. pendulus]
                                               Symphyotrichum lateriflorum var. lateriflorum
                                                     [Aster lateriflorus var. hirsuticaulis]
                                                     [Aster lateriflorus var. lateriflorus]
                                                     [Symphyotrichum lateriflorum var. hirsuticaule]
                                               Symphyotrichum lateriflorum var. spatelliforme
                                                     [Aster lateriflorus var. spatelliformis]
                                               Symphyotrichum lateriflorum var. tenuipes
                                                     [Aster lateriflorus var. tenuipes]
                                             Symphyotrichum laurentianum
                                                   [Aster laurentianus var. contiguus]
                                                   [Aster laurentianus var. laurentianus]
                                                   [Aster laurentianus var. magdalenensis]
                                                   [Aster laurentianus]
                                             Symphyotrichum lentum
                                                   [Aster chilensis var. lentus]
                                                   [Aster chilensis var. sonomensis]
                                                   [Aster lentus]
                                                   [Aster sonomensis]
                                             Symphyotrichum molle
                                                   [Aster mollis]
                                             Symphyotrichum nahanniense
                                                   [Aster nahanniensis]
                                             Symphyotrichum novae-angliae
                                                   [Aster novae-angliae]
                                                   [Lasallea novae-angliae]
                                                   [Virgulus novae-angliae]
                                             Symphyotrichum novi-belgii
                                               Symphyotrichum novi-belgii var. crenifolium
                                                     [Aster novi-belgii var. crenifolius]
                                               Symphyotrichum novi-belgii var. elodes
                                                     [Aster novi-belgii var. elodes]
                                               Symphyotrichum novi-belgii var. novi-belgii
                                                     [Aster crenifolius var. arcuans]
                                                     [Aster novi-belgii ssp. johannensis]
                                                     [Aster novi-belgii var. johannensis]
                                                     [Aster novi-belgii var. novi-belgii]
                                                     [Aster novi-belgii var. rosaceus]
                                               Symphyotrichum novi-belgii var. villicaule
                                                     [Aster johannensis var. villicaulis]
                                                     [Aster longifolius var. villicaulis]
                                                     [Aster novi-belgii var. villicaulis]
                                             Symphyotrichum oblongifolium
                                                   [Aster kumleinii]
                                                   [Aster oblongifolius var. angustatus]
                                                   [Aster oblongifolius var. orientis]
                                                   [Aster oblongifolius var. rigidulus]
                                                   [Aster oblongifolius]
                                                   [Lasallea oblongifolia]
                                                   [Virgulus oblongifolius]
                                             Symphyotrichum ontarionis
                                                   [Aster diffusus var. thyrsoides]
                                                   [Aster lateriflorus var. thyrsoides]
                                                   [Aster missouriensis var. thyrsoides]
                                                   [Aster missouriensis]
                                                   [Aster ontarionis]
                                                   [Aster pantotrichus var. thyrsoides]
                                                   [Aster pantotrichus]
                                                   [Aster tradescantii var. thyrsoides]
                                                   [Symphyotrichum ontarione]
                                               Symphyotrichum ontarionis var. glabratum
                                                     [Aster ontarionis var. glabratus]
                                                     [Symphyotrichum ontarione var. glabratum]
                                               Symphyotrichum ontarionis var. ontarionis
                                             Symphyotrichum oolentangiense
                                                   [Aster azureus var. poaceus]
                                                   [Aster azureus]
                                                   [Aster oolentangiensis var. laevicaulis]
                                                   [Aster oolentangiensis var. oolentangiensis]
                                                   [Aster oolentangiensis var. poaceus]
                                                   [Aster oolentangiensis]
                                                   [Aster poaceus]
                                                   [Aster vernalis]
                                                   [Symphyotrichum oolentangiense var. oolentangiense]
                                                   [Symphyotrichum oolentangiense var. poaceum]
                                             Symphyotrichum parviceps
                                                   [Aster depauperatus var. parviceps]
                                                   [Aster ericoides var. parviceps]
                                                   [Aster parviceps]
                                                   [Aster pilosus ssp. parviceps]
                                             Symphyotrichum patens
                                               Symphyotrichum patens var. gracile
                                                     [Aster patens var. gracilis]
                                                     [Virgulus patens var. gracilis]
                                               Symphyotrichum patens var. patens
                                                     [Aster patens var. patens]
                                                     [Lasallea patens]
                                               Symphyotrichum patens var. patentissimum
                                                     [Aster patens var. patentissimus]
                                                     [Virgulus patens var. patentissimus]
                                             Symphyotrichum phlogifolium
                                                   [Aster patens var. phlogifolius]
                                                   [Aster phlogifolius]
                                                   [Virgulus patens var. phlogifolius]
                                             Symphyotrichum pilosum
                                                   [Aster pilosus]
                                               Symphyotrichum pilosum var. pilosum
                                                     [Aster ericoides var. platyphyllus]
                                                     [Aster ericoides var. villosus]
                                                     [Aster pilosus var. pilosus]
                                                     [Aster pilosus var. platyphyllus]
                                               Symphyotrichum pilosum var. pringlei
                                                     [Aster ericoides var. pringlei]
                                                     [Aster pilosus var. demotus]
                                                     [Aster pilosus var. pringlei]
                                             Symphyotrichum plumosum
                                                   [Aster plumosus]
                                             Symphyotrichum porteri
                                                   [Aster ericoides var. strictus]
                                                   [Aster porteri]
                                             Symphyotrichum potosinum
                                                   [Aster lemmonii]
                                                   [Aster potosinus]
                                             Symphyotrichum praealtum
                                                   [Aster caerulescens]
                                                   [Aster coerulescens]
                                                   [Aster nebraskensis]
                                                   [Aster novi-belgii var. litoreus]
                                                   [Aster praealtus var. angustior]
                                                   [Aster praealtus var. caerulescens]
                                                   [Aster praealtus var. coerulescens]
                                                   [Aster praealtus var. imbricatior]
                                                   [Aster praealtus var. nebraskensis]
                                                   [Aster praealtus var. praealtus]
                                                   [Aster praealtus var. subasper]
                                                   [Aster praealtus var. texicola]
                                                   [Aster praealtus]
                                                   [Aster subasper]
                                                   [Symphyotrichum novi-belgii var. litoreum]
                                                   [Symphyotrichum praealtum var. angustior]
                                                   [Symphyotrichum praealtum var. nebraskense]
                                                   [Symphyotrichum praealtum var. praealtum]
                                                   [Symphyotrichum praealtum var. subasperum]
                                                   [Symphyotrichum praealtum var. texicola]
                                             Symphyotrichum pratense
                                                   [Aster phyllolepis]
                                                   [Aster pratensis var. texicola]
                                                   [Aster pratensis]
                                                   [Aster sericeus var. microphyllus]
                                                   [Lasallea sericea ssp. pratensis]
                                                   [Virgulus pratensis]
                                             Symphyotrichum prenanthoides
                                                   [Aster prenanthoides]
                                             Symphyotrichum priceae
                                                   [Aster kentuckiensis]
                                                   [Aster pilosus var. priceae]
                                                   [Aster priceae]
                                             Symphyotrichum puniceum
                                               Symphyotrichum puniceum var. puniceum
                                                     [Aster puniceus var. calderi]
                                                     [Aster puniceus var. calvus]
                                                     [Aster puniceus var. compactus]
                                                     [Aster puniceus var. demissus]
                                                     [Aster puniceus var. oligocephalus]
                                                     [Aster puniceus var. perlongus]
                                                     [Aster puniceus var. puniceus]
                                                     [Symphyotrichum puniceum var. calderi]
                                               Symphyotrichum puniceum var. scabricaule
                                                     [Aster puniceus var. scabricaulis]
                                             Symphyotrichum pygmaeum
                                                   [Aster pygmaea]
                                                   [Aster pygmaeus]
                                                   [Aster sibiricus ssp. pygmaeus]
                                                   [Aster sibiricus var. pygmaeus]
                                                   [Eurybia pygmaea]
                                             Symphyotrichum racemosum
                                                   [Aster fragilis var. brachypholis]
                                                   [Aster fragilis var. fragilis]
                                                   [Aster fragilis var. subdumosus]
                                                   [Aster fragilis]
                                                   [Aster racemosus]
                                                   [Aster vimineus var. subdumosus]
                                                   [Symphyotrichum racemosum var. subdumosum]
                                             Symphyotrichum retroflexum
                                                   [Aster curtisii]
                                                   [Aster retroflexus]
                                             Symphyotrichum rhiannon
                                             Symphyotrichum robynsianum
                                                   [Aster robynsianus]
                                             Symphyotrichum sericeum
                                                   [Aster sericeus var. sericeus]
                                                   [Aster sericeus]
                                                   [Lasallea sericea]
                                                   [Virgulus sericeus]
                                             Symphyotrichum shortii
                                                   [Aster camptosorus]
                                                   [Aster shortii]
                                             Symphyotrichum simmondsii
                                                   [Aster simmondsii]
                                                   [Aster sulznerae]
                                             Symphyotrichum simplex
                                             Symphyotrichum spathulatum
                                               Symphyotrichum spathulatum var. intermedium
                                                     [Aster occidentalis var. intermedius]
                                               Symphyotrichum spathulatum var. spathulatum
                                                     [Aster ascendens var. fremontii]
                                                     [Aster fremontii var. parishii]
                                                     [Aster occidentalis var. delectabilis]
                                                     [Aster occidentalis var. fremontii]
                                                     [Aster occidentalis var. occidentalis]
                                                     [Aster occidentalis var. parishii]
                                                     [Symphyotrichum spathulatum var. fremontii]
                                                     [Tripolium occidentale]
                                               Symphyotrichum spathulatum var. yosemitanum
                                                     [Aster ascendens var. yosemitanus]
                                                     [Aster occidentalis var. yosemitanus]
                                                     [Aster paludicola var. paludicola]
                                             Symphyotrichum squamatum
                                             Symphyotrichum subspicatum
                                                   [Aster ciliolatus var. maccallae]
                                                   [Aster ciliolatus var. maccallii]
                                                   [Aster douglasii]
                                                   [Aster douglassi]
                                                   [Aster grayi]
                                                   [Aster maccallae]
                                                   [Aster maccallii]
                                                   [Aster oregonum]
                                                   [Aster subspicatus var. grayi]
                                                   [Aster subspicatus var. subspicatus]
                                                   [Aster subspicatus]
                                                   [Symphyotrichum ciliolatum var. maccallae]
                                                   [Symphyotrichum subspicatum var. grayi]
                                                   [Symphyotrichum subspicatum var. subspicatum]
                                                   [Tripolium oregonum]
                                             Symphyotrichum subulatum
                                                   [Aster subulatus var. euroauster]
                                                   [Aster subulatus]
                                               Symphyotrichum subulatum var. elongatum
                                                     [Aster subulatus var. elongatus]
                                               Symphyotrichum subulatum var. ligulatum
                                                     [Aster subulatus var. ligulatus]
                                               Symphyotrichum subulatum var. parviflorum
                                                     [Aster subulatus var. cubensis]
                                                     [Tripolium subulatum var. parviflorum]
                                               Symphyotrichum subulatum var. squamatum
                                                     [Aster divaricatus var. sandwicensis]
                                                     [Aster exilis var. australis]
                                                     [Aster subulatus var. australis]
                                                     [Aster subulatus var. sandwicensis]
                                               Symphyotrichum subulatum var. subulatum
                                                     [Aster subulatus var. obtusifolius]
                                                     [Aster subulatus var. subulatus]
                                             Symphyotrichum tenuifolium
                                                   [Aster tenuifolius]
                                               Symphyotrichum tenuifolium var. aphyllum
                                                     [Aster tenuifolius var. aphyllus]
                                               Symphyotrichum tenuifolium var. tenuifolium
                                             Symphyotrichum tradescantii
                                                   [Aster saxatilis]
                                                   [Aster tradescantii var. saxatilis]
                                                   [Aster vimineus var. saxatilis]
                                             Symphyotrichum turbinellum
                                                   [Aster turbinellus]
                                             Symphyotrichum undulatum
                                                   [Aster asperifolius]
                                                   [Aster baldwinii]
                                                   [Aster claviger]
                                                   [Aster corrigiatus]
                                                   [Aster diversifolius]
                                                   [Aster gracilescens]
                                                   [Aster linguiformis]
                                                   [Aster loriformis]
                                                   [Aster mohrii]
                                                   [Aster proteus]
                                                   [Aster sylvestris]
                                                   [Aster triangularis]
                                                   [Aster truellius]
                                                   [Aster undulatus var. asperulus]
                                                   [Aster undulatus var. diversifolius]
                                                   [Aster undulatus var. loriformis]
                                                   [Aster undulatus var. triangularis]
                                                   [Aster undulatus var. undulatus]
                                                   [Aster undulatus]
                                             Symphyotrichum urophyllum
                                                   [Aster hirtellus]
                                                   [Aster sagittifolius var. urophyllus]
                                                   [Aster urophyllus]
                                             Symphyotrichum vahlii
                                               Symphyotrichum vahlii var. vahlii
                                             Symphyotrichum walteri
                                                   [Aster squarrosus]
                                                   [Aster walteri]
                                                   [Lasallea walteri]
                                                   [Virgulus walteri]
                                             Symphyotrichum welshii
                                                   [Aster welshii]
                                             Symphyotrichum yukonense
                                                   [Aster yukonensis]
                                                   [Virgulus yukonensis]
                                     Synedrella
                                             Synedrella nodiflora
                                                   [Verbesina nodiflora]
                                     Synedrellopsis
                                     Syntrichopappus
                                             Syntrichopappus fremontii
                                             Syntrichopappus lemmonii
                                     Tagetes
                                             Tagetes erecta
                                                   [Tagetes corymbosa]
                                                   [Tagetes major]
                                                   [Tagetes patula]
                                                   [Tagetes remotiflora]
                                                   [Tagetes signata]
                                                   [Tagetes tenuifolia]
                                             Tagetes filifolia
                                                   [Tagetes pusilla]
                                             Tagetes lemmonii
                                                   [Tagetes alamensis]
                                                   [Tagetes palmeri]
                                             Tagetes lucida
                                             Tagetes micrantha
                                                   [Tagetes fragrantissima]
                                             Tagetes minima
                                             Tagetes minuta
                                                   [Tagetes bonariensis]
                                                   [Tagetes glandulifera]
                                                   [Tagetes glandulosa]
                                                   [Tagetes porophylla]
                                     Tamaulipa
                                             Tamaulipa azurea
                                     Tanacetum
                                             Tanacetum balsamita
                                                   [Balsamita major var. tanacetoides]
                                                   [Balsamita major]
                                                   [Chrysanthemum balsamita var. tanacetoides]
                                                   [Chrysanthemum balsamita]
                                                   [Pyrethrum majus]
                                             Tanacetum bipinnatum
                                                   [Chrysanthemum bipinnatum ssp. huronense]
                                                   [Chrysanthemum bipinnatum]
                                                   [Tanacetum bipinnatum ssp. bipinnatum]
                                                   [Tanacetum bipinnatum ssp. huronense]
                                                   [Tanacetum camphoratum]
                                                   [Tanacetum douglasi]
                                                   [Tanacetum douglasii]
                                                   [Tanacetum horonense]
                                                   [Tanacetum huronense var. bifarium]
                                                   [Tanacetum huronense var. floccosum]
                                                   [Tanacetum huronense var. johannense]
                                                   [Tanacetum huronense var. terrae-novae]
                                                   [Tanacetum huronense]
                                             Tanacetum coccineum
                                                   [Chrysanthemum coccineum]
                                                   [Chrysanthemum roseum]
                                             Tanacetum corymbosum
                                                   [Chrysanthemum corymbosum]
                                             Tanacetum parthenium
                                                   [Chrysanthemum parthenium]
                                                   [Matricaria parthenium]
                                                   [Tanacetum pathenium]
                                             Tanacetum potentilloides
                                             Tanacetum serotinum
                                             Tanacetum vulgare
                                                   [Chrysanthemum vulgare]
                                                   [Tanacetum boreale]
                                                   [Tanacetum vulgare var. crispum]
                                     Taraxacum
                                             Taraxacum alaskanum
                                                   [Taraxacum kamtschaticum]
                                                   [Taraxacum sibiricum]
                                             Taraxacum californicum
                                             Taraxacum carneocoloratum
                                             Taraxacum ceratophorum
                                                   [Taraxacum ambigens var. flutius]
                                                   [Taraxacum amphiphron]
                                                   [Taraxacum arctogenum]
                                                   [Taraxacum brachyceras]
                                                   [Taraxacum carthamopsis]
                                                   [Taraxacum dumetorum]
                                                   [Taraxacum eriophorum]
                                                   [Taraxacum eurylepium]
                                                   [Taraxacum hyperboreum]
                                                   [Taraxacum integratum]
                                                   [Taraxacum lacerum]
                                                   [Taraxacum lateritium]
                                                   [Taraxacum lecerum]
                                                   [Taraxacum longii]
                                                   [Taraxacum mackenziense]
                                                   [Taraxacum malteanum]
                                                   [Taraxacum maurolepium]
                                                   [Taraxacum mitratum]
                                                   [Taraxacum multesimum]
                                                   [Taraxacum officinale ssp. ceratophorum]
                                                   [Taraxacum olympicum]
                                                   [Taraxacum ovinum]
                                                   [Taraxacum paucisquamosum]
                                                   [Taraxacum pellianum]
                                                   [Taraxacum pseudonorvegicum]
                                                   [Taraxacum purpuridens]
                                                   [Taraxacum umbrinum]
                                             Taraxacum dumetorum
                                             Taraxacum eriophorum
                                             Taraxacum erythrospermum
                                                   [Leontodon erythrospermum]
                                                   [Taraxacum disseminatum]
                                                   [Taraxacum lacistophyllum]
                                                   [Taraxacum laevigatum]
                                                   [Taraxacum scanicum]
                                             Taraxacum glabrum
                                                   [Taraxacum glabra]
                                             Taraxacum holmenianum
                                                   [Taraxacum pumilum]
                                             Taraxacum hyparcticum
                                                   [Taraxacum arcticum]
                                             Taraxacum lapponicum
                                                   [Taraxacum ambigens]
                                                   [Taraxacum atroglaucum]
                                                   [Taraxacum campylodes]
                                                   [Taraxacum croceum]
                                                   [Taraxacum curvidens]
                                                   [Taraxacum cyclocentrum]
                                                   [Taraxacum davidssonii]
                                                   [Taraxacum dilutisquameum]
                                                   [Taraxacum firmum]
                                                   [Taraxacum islandiciforme]
                                                   [Taraxacum latispinulosum]
                                                   [Taraxacum naevosum]
                                                   [Taraxacum pleniflorum]
                                                   [Taraxacum spectabile]
                                                   [Taraxacum torngatense]
                                             Taraxacum latilobum
                                                   [Leontodon latiloba]
                                             Taraxacum laurentianum
                                             Taraxacum officinale
                                                   [Taraxacum kok-saghyz]
                                                   [Taraxacum officinale ssp. vulgare]
                                                   [Taraxacum palustre var. vulgare]
                                                   [Taraxacum vulgare]
                                               Taraxacum officinale ssp. officinale
                                                     [Leontodon taraxacoides ssp. longirostris]
                                                     [Leontodon taraxacoides]
                                                     [Leontodon taraxacum]
                                                     [Taraxacum dahlstedtii]
                                                     [Taraxacum devians]
                                                     [Taraxacum officinale var. palustre]
                                                     [Taraxacum retroflexum]
                                                     [Taraxacum rhodolepis]
                                                     [Taraxacum undulatum]
                                                     [Taraxacum vagans]
                                                     [Taraxacum xanthostigma]
                                             Taraxacum ovinum
                                             Taraxacum palustre
                                                   [Taraxacum turfosum]
                                             Taraxacum phymatocarpum
                                             Taraxacum scopulorum
                                                   [Taraxacum lyratum]
                                             Taraxacum trigonolobum
                                     Telanthophora
                                             Telanthophora grandifolia
                                     Tephroseris
                                             Tephroseris frigida
                                                   [Senecio atropurpureus ssp. frigidus]
                                                   [Senecio atropurpureus var. ulmeri]
                                                   [Tephroseris atropurpurea ssp. frigida]
                                             Tephroseris integrifolia
                                               Tephroseris integrifolia ssp. atropurpurea
                                                     [Tephroseris atropurpurea ssp. atropurpurea]
                                             Tephroseris kjellmanii
                                                   [Senecio atropurpureus ssp. tomentosus]
                                                   [Senecio atropurpureus var. dentatus]
                                                   [Tephroseris atropurpurea ssp. tomentosa]
                                             Tephroseris lindstroemii
                                                   [Tephroseris tundricola var. lindstroemii]
                                             Tephroseris palustris
                                                   [Cineraria congesta]
                                                   [Senecio congestus ssp. tonsus]
                                                   [Senecio congestus var. palustris]
                                                   [Senecio congestus var. tonsus]
                                             Tephroseris tundricola
                                             Tephroseris yukonensis
                                     Tepion
                                     Tessaria
                                     Tetradymia
                                             Tetradymia argyraea
                                             Tetradymia axillaris
                                               Tetradymia axillaris var. axillaris
                                               Tetradymia axillaris var. longispina
                                             Tetradymia canescens
                                                   [Tetradymia canescens var. inermis]
                                             Tetradymia comosa
                                             Tetradymia filifolia
                                             Tetradymia glabrata
                                             Tetradymia nuttallii
                                             Tetradymia ramosissima
                                             Tetradymia spinosa
                                               Tetradymia spinosa var. longispina
                                             Tetradymia stenolepis
                                             Tetradymia tetrameres
                                                   [Tetradymia comosa ssp. tetrameres]
                                                   [Tetradymia tetrameris]
                                     Tetragonotheca
                                           [Tetragonothela]
                                             Tetragonotheca helianthoides
                                                   [Gonotheca helianthoides]
                                                   [Tetragonothela helianthoides]
                                             Tetragonotheca ludoviciana
                                                   [Halea ludoviciana]
                                                   [Tetragonothela ludoviciana]
                                             Tetragonotheca repanda
                                                   [Halea repanda]
                                                   [Tetragonothela repanda]
                                             Tetragonotheca texana
                                                   [Tetragonothela texana]
                                     Tetramolopium
                                             Tetramolopium arbusculum
                                             Tetramolopium arenarium
                                               Tetramolopium arenarium ssp. arenarium
                                               Tetramolopium arenarium var. arenarium
                                               Tetramolopium arenarium var. confertum
                                               Tetramolopium arenarium ssp. laxum
                                                     [Tetramolopium arenarium var. dentatum]
                                             Tetramolopium calcisabulorum
                                             Tetramolopium capillare
                                                   [Luteidiscus capillaris]
                                             Tetramolopium consanguineum
                                               Tetramolopium consanguineum ssp. consanguineum
                                               Tetramolopium consanguineum ssp. leptophyllum
                                             Tetramolopium conyzoides
                                                   [Tetramolopium conyzoides var. dentatum]
                                                   [Tetramolopium conzoides]
                                             Tetramolopium filiforme
                                               Tetramolopium filiforme var. filiforme
                                               Tetramolopium filiforme var. polyphyllum
                                             Tetramolopium humile
                                               Tetramolopium humile ssp. haleakalae
                                               Tetramolopium humile ssp. humile
                                               Tetramolopium humile var. humile
                                               Tetramolopium humile var. sublaeve
                                               Tetramolopium humile var. skottsbergii
                                             Tetramolopium lepidotum
                                               Tetramolopium lepidotum ssp. arbusculum
                                               Tetramolopium lepidotum ssp. lepidotum
                                                     [Tetramolopium lepidotum var. luxurians]
                                             Tetramolopium polyphyllum
                                             Tetramolopium remyi
                                                   [Vittadinia remyi]
                                             Tetramolopium rockii
                                               Tetramolopium rockii var. calcisabulorum
                                               Tetramolopium rockii var. rockii
                                             Tetramolopium sylvae
                                             Tetramolopium tenerrimum
                                     Tetraneuris
                                             Tetraneuris acaulis
                                               Tetraneuris acaulis var. acaulis
                                                     [Actinea acaulis]
                                                     [Actinella acaulis]
                                                     [Hymenoxys acaulis]
                                                     [Tetraneuris simplex]
                                               Tetraneuris acaulis var. arizonica
                                                     [Actinea acaulis var. arizonica]
                                                     [Hymenoxys acaulis var. arizonica]
                                                     [Hymenoxys acaulis var. nana]
                                                     [Tetraneuris acaulis var. nana]
                                               Tetraneuris acaulis var. caespitosa
                                                     [Hymenoxys acaulis var. caespitosa]
                                                     [Hymenoxys acaulis var. lanata]
                                                     [Tetraneuris brevifolia]
                                               Tetraneuris acaulis var. epunctata
                                                     [Hymenoxys acaulis var. epunctata]
                                                     [Tetraneuris epunctata]
                                             Tetraneuris argentea
                                                   [Actinella argentea]
                                                   [Hymenoxys argentea]
                                             Tetraneuris brandegeei
                                             Tetraneuris brevifolia
                                             Tetraneuris grandiflora
                                             Tetraneuris herbacea
                                                   [Actinea herbacea]
                                                   [Hymenoxys acaulis var. glabra]
                                                   [Hymenoxys herbacea]
                                             Tetraneuris ivesiana
                                                   [Hymenoxys acaulis var. ivesiana]
                                                   [Hymenoxys argentea var. ivesiana]
                                                   [Hymenoxys ivesiana]
                                                   [Tetraneuris mancosensis]
                                                   [Tetraneuris pilosa]
                                             Tetraneuris linearifolia
                                               Tetraneuris linearifolia var. arenicola
                                               Tetraneuris linearifolia var. linearifolia
                                                     [Hymenoxys linearifolia]
                                             Tetraneuris scaposa
                                               Tetraneuris scaposa var. argyrocaulon
                                                     [Hymenoxys scaposa var. argyrocaulon]
                                               Tetraneuris scaposa var. scaposa
                                                     [Hymenoxys glabra]
                                                     [Hymenoxys scaposa var. glabra]
                                                     [Hymenoxys scaposa var. linearis]
                                                     [Hymenoxys scaposa var. villosa]
                                                     [Hymenoxys scaposa]
                                                     [Tetraneuris fastigiata]
                                                     [Tetraneuris glabra]
                                                     [Tetraneuris scaposa var. linearis]
                                                     [Tetraneuris scaposa var. villosa]
                                                     [Tetraneuris stenophylla]
                                             Tetraneuris torreyana
                                                   [Hymenoxys depressa]
                                                   [Hymenoxys lapidicola]
                                                   [Hymenoxys torreyana]
                                                   [Tetraneuris depressa]
                                             Tetraneuris turneri
                                                   [Hymenoxys turneri]
                                             Tetraneuris verdiensis
                                     Thelesperma
                                             Thelesperma ambiguum
                                                   [Thelesperma fraternum]
                                                   [Thelesperma megapotamicum var. ambiguum]
                                             Thelesperma burridgeanum
                                             Thelesperma filifolium
                                                   [Thelesperma filifolium var. filifolium]
                                                   [Thelesperma filifolium var. intermedium]
                                                   [Thelesperma intermedium]
                                                   [Thelesperma trifidum]
                                               Thelesperma filifolium var. intermedium
                                             Thelesperma flavodiscum
                                             Thelesperma longipes
                                             Thelesperma megapotamicum
                                                   [Bidens megapotamica]
                                                   [Thelesperma gracile]
                                             Thelesperma nuecense
                                             Thelesperma simplicifolium
                                                   [Thelesperma carvicarpum]
                                                   [Thelesperma curvicarpum]
                                             Thelesperma subnudum
                                                   [Thelesperma caespitosum]
                                                   [Thelesperma marginatum]
                                                   [Thelesperma pubescens]
                                                   [Thelesperma subnudum var. alpinum]
                                                   [Thelesperma subnudum var. caespitosum]
                                                   [Thelesperma subnudum var. marginatum]
                                                   [Thelesperma subnudum var. subnudum]
                                     Thurovia
                                             Thurovia triflora
                                     Thymophylla
                                             Thymophylla acerosa
                                                   [Dyssodia acerosa]
                                             Thymophylla aurea
                                               Thymophylla aurea var. aurea
                                                     [Dyssodia aurea]
                                                     [Lowellia aurea]
                                               Thymophylla aurea var. polychaeta
                                                     [Dyssodia aurea var. polychaeta]
                                                     [Dyssodia polychaeta]
                                                     [Thymophylla polychaeta]
                                             Thymophylla concinna
                                                   [Dyssodia concinna]
                                             Thymophylla micropoides
                                                   [Dyssodia micropoides]
                                             Thymophylla pentachaeta
                                               Thymophylla pentachaeta var. belenidium
                                                     [Dyssodia pentachaeta var. belenidium]
                                               Thymophylla pentachaeta var. hartwegii
                                                     [Dyssodia pentachaeta ssp. hartwegii]
                                                     [Dyssodia pentachaeta var. hartwegii]
                                               Thymophylla pentachaeta var. pentachaeta
                                                     [Hymenatherum pentachaetum]
                                               Thymophylla pentachaeta var. puberula
                                                     [Dyssodia pentachaeta var. puberula]
                                             Thymophylla setifolia
                                               Thymophylla setifolia var. greggii
                                                     [Dyssodia setifolia var. greggii]
                                                     [Dyssodia setifolia var. radiata]
                                                     [Thymophylla setifolia var. radiata]
                                               Thymophylla setifolia var. setifolia
                                             Thymophylla tenuiloba
                                               Thymophylla tenuiloba var. tenuiloba
                                               Thymophylla tenuiloba var. texana
                                                     [Dyssodia tenuiloba var. texana]
                                               Thymophylla tenuiloba var. treculii
                                                     [Dyssodia tenuiloba var. treculii]
                                               Thymophylla tenuiloba var. wrightii
                                                     [Dyssodia tenuiloba ssp. wrightii]
                                             Thymophylla tephroleuca
                                                   [Dyssodia tephroleuca]
                                     Tithonia
                                             Tithonia diversifolia
                                                   [Mirasolia diversifolia]
                                             Tithonia rotundifolia
                                                   [Tagetes rotundifolia]
                                                   [Tithonia speciosa]
                                             Tithonia thurberi
                                     Toiyabea
                                             Toiyabea alpina
                                                   [Haplopappus alpinus]
                                     Tolpis
                                             Tolpis barbata
                                                   [Tolpis umbellata]
                                     Tonestus
                                             Tonestus aberrans
                                             Tonestus alpinus
                                             Tonestus eximius
                                                   [Haplopappus eximius]
                                             Tonestus graniticus
                                                   [Haplopappus graniticus]
                                             Tonestus lyallii
                                                   [Haplopappus lyallii]
                                             Tonestus microcephalus
                                             Tonestus peirsonii
                                             Tonestus pygmaeus
                                                   [Haplopappus pygmaeus]
                                     Townsendia
                                             Townsendia annua
                                             Townsendia aprica
                                                   [Townsendia jonesii var. lutea]
                                             Townsendia condensata
                                                   [Townsendia anomala]
                                                   [Townsendia condensata var. anomala]
                                                   [Townsendia condensata var. condensata]
                                             Townsendia eximia
                                                   [Townsendia vreelandii]
                                             Townsendia exscapa
                                                   [Aster exscapus]
                                                   [Townsendia excapa]
                                                   [Townsendia intermedia]
                                                   [Townsendia sericea]
                                             Townsendia fendleri
                                             Townsendia florifer
                                                   [Townsendia florifer var. watsonii]
                                                   [Townsendia florifera var. watsonii]
                                                   [Townsendia florifera]
                                             Townsendia formosa
                                                   [Townsendia pinetorum]
                                             Townsendia glabella
                                             Townsendia grandiflora
                                             Townsendia gypsophila
                                             Townsendia hookeri
                                                   [Townsendia nuttallii]
                                             Townsendia incana
                                                   [Townsendia arizonica]
                                             Townsendia jonesii
                                                   [Townsendia jonesi]
                                                   [Townsendia jonesii var. tumulosa]
                                               Townsendia jonesii var. jonesii
                                                     [Townsendia mensana var. jonesii]
                                             Townsendia leptotes
                                                   [Townsendia sericea var. leptotes]
                                             Townsendia mensana
                                                   [Townsendia memsana]
                                             Townsendia microcephala
                                             Townsendia minima
                                                   [Townsendia alpigena var. minima]
                                                   [Townsendia montana var. minima]
                                             Townsendia montana
                                                   [Townsendia alpigena var. alpigena]
                                                   [Townsendia alpigena var. caelilinensis]
                                                   [Townsendia alpigena]
                                                   [Townsendia montana var. caelilinensis]
                                             Townsendia parryi
                                             Townsendia rothrockii
                                             Townsendia scapigera
                                             Townsendia smithii
                                             Townsendia spathulata
                                             Townsendia strigosa
                                             Townsendia texensis
                                     Tracyina
                                             Tracyina rostrata
                                     Tragopogon
                                             Tragopogon X crantzii
                                             Tragopogon X neohybridus
                                             Tragopogon dubius
                                                   [Tragopogon dubius ssp. major]
                                                   [Tragopogon major]
                                             Tragopogon dubius X porrifolius
                                               Tragopogon dubius ssp. major
                                             Tragopogon floccosus
                                             Tragopogon hybridus
                                             Tragopogon mirabilis
                                             Tragopogon mirus
                                             Tragopogon miscellus
                                             Tragopogon porrifolius
                                             Tragopogon pratensis
                                                   [Tragopogon lamottei]
                                                   [Tragopogon orientalis]
                                                   [Tragopogon pratensis ssp. orientalis]
                                                   [Tragopogon pratensis ssp. pratensis]
                                     Trichocoronis
                                             Trichocoronis wrightii
                                                   [Trichocoronis riparia]
                                                   [Trichocoronis wrightii var. wrightii]
                                     Trichoptilium
                                             Trichoptilium incisum
                                     Tridax
                                             Tridax procumbens
                                     Trimorpha
                                             Trimorpha elongata
                                             Trimorpha lonchophylla
                                     Triniteurybia
                                             Triniteurybia aberrans
                                                   [Haplopappus aberrans]
                                     Tripleurospermum
                                             Tripleurospermum inodorum
                                                   [Chamomilla inodora]
                                                   [Matricaria maritima ssp. inodora]
                                                   [Matricaria maritima var. agrestis]
                                                   [Tripleurospermum perforata]
                                             Tripleurospermum maritima
                                               Tripleurospermum maritima ssp. maritima
                                               Tripleurospermum maritima ssp. phaeocephala
                                             Tripleurospermum phaeocephalum
                                     Tripolium
                                             Tripolium pannonicum
                                                   [Aster tripolium ssp. pannonicus]
                                             Tripolium subulatum
                                     Trixis
                                             Trixis californica
                                               Trixis californica var. californica
                                             Trixis inula
                                                   [Trixis radialis]
                                     Troximon
                                     Tuckermannia
                                     Tussilago
                                             Tussilago farfara
                                     Unamia
                                             Unamia alba
                                     Uropappus
                                             Uropappus lindleyi
                                                   [Uropappus linearifolius]
                                     Urospermum
                                             Urospermum picroides
                                     Vargasia
                                     Varilla
                                             Varilla texana
                                     Venegasia
                                             Venegasia carpesioides
                                     Venidium
                                             Venidium fastuosum
                                     Verbesina
                                             Verbesina alata
                                                   [Hamulium alatum]
                                                   [Tepion alatum]
                                             Verbesina alternifolia
                                                   [Actinomeris alternifolia]
                                                   [Ridan alternifolia]
                                             Verbesina aristata
                                                   [Actinomeris nudicaulis]
                                                   [Pterophyton aristatum]
                                                   [Verbesina nudicaulis]
                                             Verbesina chapmanii
                                             Verbesina dissita
                                             Verbesina encelioides
                                                   [Verbesina encelioides ssp. encelioides]
                                                   [Verbesina encelioides ssp. exauriculata]
                                                   [Verbesina encelioides var. exauriculata]
                                                   [Verbesina exauriculata]
                                             Verbesina gigantea
                                             Verbesina hastata
                                             Verbesina helianthoides
                                                   [Actinomeris helianthoides var. elliottii]
                                                   [Actinomeris helianthoides var. nuttallii]
                                                   [Actinomeris helianthoides]
                                                   [Actinomeris oppositifolia]
                                                   [Phaethusa helianthoides]
                                                   [Pterophyton helianthoides]
                                             Verbesina heterophylla
                                                   [Actinomeris heterophylla]
                                                   [Actinomeris pauciflora]
                                                   [Pterophyton heterophyllum]
                                                   [Pterophyton pauciflorum]
                                                   [Verbesina pauciflora]
                                                   [Verbesina warei]
                                             Verbesina howardiana
                                             Verbesina lindheimeri
                                             Verbesina longifolia
                                                   [Actinomeris longifolia]
                                             Verbesina microptera
                                                   [Verbesina microptera var. mollissima]
                                                   [Verbesina texana]
                                             Verbesina nana
                                                   [Wootonella nana]
                                             Verbesina occidentalis
                                                   [Phaethusa occidentalis]
                                             Verbesina oreophila
                                             Verbesina rothrockii
                                             Verbesina virginica
                                                   [Phaethusa laciniata]
                                                   [Phaethusa virginica]
                                                   [Sigesbeckia laciniata]
                                                   [Verbesina laciniata]
                                                   [Verbesina sinuata]
                                                   [Verbesina virginica var. insularis]
                                                   [Verbesina virginica var. laciniata]
                                                   [Verbesina virginica var. virginica]
                                             Verbesina walteri
                                                   [Ridan paniculata]
                                     Vernonia
                                           [Veronia]
                                             Vernonia X concinna
                                             Vernonia X dissimilis
                                             Vernonia X georgiana
                                             Vernonia X guadalupensis
                                             Vernonia X illinoensis
                                             Vernonia X peralta
                                             Vernonia X recurva
                                                   [Vernonia recurva]
                                             Vernonia X vulturina
                                             Vernonia acaulis
                                             Vernonia albicaulis
                                             Vernonia angustifolia
                                                   [Vernonia angustifolia ssp. angustifolia]
                                                   [Vernonia angustifolia ssp. mohrii]
                                                   [Vernonia angustifolia ssp. scaberrima]
                                                   [Vernonia angustifolia var. mohrii]
                                                   [Vernonia angustifolia var. scaberrima]
                                                   [Vernonia scaberrima]
                                             Vernonia anthelmintica
                                             Vernonia arkansana
                                                   [Vernonia crinita]
                                             Vernonia baldwinii
                                                   [Vernonia baldwinii ssp. baldwinii]
                                                   [Vernonia interior]
                                               Vernonia baldwinii ssp. interior
                                             Vernonia blodgettii
                                             Vernonia borinquensis
                                             Vernonia cinerea
                                             Vernonia fasciculata
                                                   [Vernonia fasciculata ssp. fasciculata]
                                                   [Vernonia fasciculata var. corymbosa]
                                               Vernonia fasciculata ssp. corymbosa
                                             Vernonia flaccidifolia
                                             Vernonia galamensis
                                                   [Vernonia pauciflora]
                                             Vernonia gigantea
                                                   [Vernonia altissima var. lilacina]
                                                   [Vernonia altissima var. taeniotricha]
                                                   [Vernonia altissima]
                                                   [Vernonia gigantea ssp. gigantea]
                                                   [Vernonia gigantea ssp. ovalifolia]
                                                   [Vernonia ovalifolia]
                                             Vernonia glauca
                                             Vernonia larseniae
                                                   [Vernonia larsenii]
                                                   [Vernonia lindheimeri var. leucophylla]
                                             Vernonia lettermannii
                                             Vernonia lindheimeri
                                             Vernonia longifolia
                                             Vernonia marginata
                                                   [Vernonia marginata var. tenuifolia]
                                             Vernonia missurica
                                                   [Vernonia aborigina]
                                             Vernonia noveboracensis
                                                   [Vernonia harperi]
                                                   [Vernonia noveboracensis var. tomentosa]
                                                   [Veronia noveboracensis]
                                             Vernonia proctori
                                             Vernonia proctorii
                                             Vernonia pulchella
                                             Vernonia remotiflora
                                             Vernonia sericea
                                             Vernonia texana
                                             Vernonia vahliana
                                     Vesicarpa
                                     Viguiera
                                             Viguiera cordifolia
                                             Viguiera deltoidea
                                                   [Viguiera deltoidea var. deltoidea]
                                                   [Viguiera deltoidea var. genuina]
                                             Viguiera dentata
                                               Viguiera dentata var. dentata
                                               Viguiera dentata var. lancifolia
                                             Viguiera phenax
                                                   [Viguiera ludens]
                                             Viguiera stenoloba
                                                   [Viguiera stenoloba var. chihuahuensis]
                                               Viguiera stenoloba var. stenoloba
                                     Virgulaster
                                             Virgulaster ascendens
                                     Virgulus
                                             Virgulus amethystinus
                                             Virgulus campestris
                                             Virgulus carolinianus
                                             Virgulus ericoides
                                             Virgulus falcatus
                                             Virgulus fendleri
                                             Virgulus novae-angliae
                                             Virgulus oblongifolius
                                             Virgulus patens
                                     Vittadinia
                                     Volutaria
                                           [Cyanopsis]
                                             Volutaria muricata
                                                   [Cyanopsis muricata]
                                     Weberaster
                                     Wilkesia
                                             Wilkesia gymnoxiphium
                                             Wilkesia hobdyi
                                     Willoughbya
                                     Wollastonia
                                     Wootonella
                                     Wyethia
                                             Wyethia X cusickii
                                             Wyethia X magna
                                             Wyethia amplexicaulis
                                                   [Espeletia amplexicaulis]
                                             Wyethia angustifolia
                                                   [Wyethia angustifolia var. foliosa]
                                             Wyethia arizonica
                                             Wyethia bolanderi
                                             Wyethia elata
                                             Wyethia glabra
                                             Wyethia helenioides
                                             Wyethia helianthoides
                                             Wyethia invenusta
                                             Wyethia longicaulis
                                                   [Wyethia lingicaulis]
                                             Wyethia magna
                                             Wyethia mollis
                                             Wyethia ovata
                                             Wyethia reticulata
                                             Wyethia scabra
                                               Wyethia scabra var. attenuata
                                               Wyethia scabra var. canescens
                                               Wyethia scabra var. var scabra
                                     X Argyrautia
                                             X Argyrautia degeneri
                                     Xanthisma
                                             Xanthisma blephariphyllum
                                                   [Haplopappus blephariphyllus]
                                                   [Haplopappus gymnocephalus]
                                             Xanthisma coloradoense
                                                   [Eriocarpum coloradoense]
                                                   [Haplopappus coloradoensis]
                                             Xanthisma gracile
                                                   [Dieteria gracilis]
                                                   [Haplopappus gracilis]
                                                   [Haplopappus ravenii]
                                                   [Sideranthus gracilis]
                                             Xanthisma grindelioides
                                                   [Eriocarpum grindelioides]
                                                   [Haplopappus nuttallii]
                                                   [Sideranthus grindelioides]
                                               Xanthisma grindelioides var. depressum
                                                     [Haplopappus nuttallii var. depressus]
                                               Xanthisma grindelioides var. grindelioides
                                             Xanthisma gypsophilum
                                             Xanthisma junceum
                                                   [Haplopappus junceus]
                                             Xanthisma spinulosum
                                                   [Amellus spinulosus]
                                                   [Dieteria spinulosa]
                                                   [Diplopappus pinnatifidus]
                                                   [Eriocarpum australe]
                                                   [Eriocarpum spinulosum]
                                                   [Eriocarpum wootonii]
                                                   [Haplopappus coulteri]
                                                   [Haplopappus spinulosus ssp. australis]
                                                   [Haplopappus spinulosus ssp. laevis]
                                                   [Haplopappus spinulosus var. canescens]
                                                   [Haplopappus spinulosus var. glaber]
                                                   [Haplopappus spinulosus var. turbinellus]
                                                   [Haplopappus spinulosus]
                                                   [Sideranthus australis]
                                                   [Sideranthus cotula]
                                                   [Sideranthus laevis]
                                                   [Sideranthus machaerantherus]
                                                   [Sideranthus puberulus]
                                                   [Sideranthus spinulosus]
                                                   [Sideranthus wootonii]
                                                   [Starkea pinnata]
                                               Xanthisma spinulosum var. chihuahuanum
                                                     [Haplopappus spinulosus var. chihuahuanus]
                                               Xanthisma spinulosum var. glaberrimum
                                                     [Haplopappus spinulosus ssp. glaberrimus]
                                                     [Haplopappus spinulosus var. glaberrimus]
                                                     [Sideranthus spinulosus var. glaberrimus]
                                               Xanthisma spinulosum var. gooddingii
                                                     [Haplopappus spinulosus var. gooddingii]
                                               Xanthisma spinulosum var. paradoxum
                                                     [Haplopappus spinulosus var. paradoxa]
                                               Xanthisma spinulosum var. spinulosum
                                                     [Haplopappus spinulosus ssp. cotula]
                                                     [Haplopappus spinulosus ssp. cotulus]
                                             Xanthisma texanum
                                               Xanthisma texanum var. drummondii
                                                     [Xanthisma texanum ssp. drummondii]
                                               Xanthisma texanum var. orientale
                                               Xanthisma texanum var. texanum
                                                     [Xanthisma texanum ssp. texanum]
                                             Xanthisma viscidum
                                                   [Haplopappus havardii]
                                     Xanthium
                                             Xanthium macrocarpum
                                             Xanthium spinosum
                                                   [Acanthoxanthium spinosum]
                                                   [Xanthium ambrosioides]
                                                   [Xanthium spinosum var. inerme]
                                             Xanthium strumarium
                                                   [Xanthium acerosum]
                                                   [Xanthium americanum]
                                                   [Xanthium californicum var. rotundifolium]
                                                   [Xanthium californicum]
                                                   [Xanthium calvum]
                                                   [Xanthium campestre]
                                                   [Xanthium canadense]
                                                   [Xanthium cavanillesii]
                                                   [Xanthium cenchroides]
                                                   [Xanthium chasei]
                                                   [Xanthium chinense]
                                                   [Xanthium commune]
                                                   [Xanthium curvescens]
                                                   [Xanthium cylindraceum]
                                                   [Xanthium echinatum]
                                                   [Xanthium echinellum]
                                                   [Xanthium glanduliferum]
                                                   [Xanthium globosum]
                                                   [Xanthium inflexum]
                                                   [Xanthium italicum]
                                                   [Xanthium macounii]
                                                   [Xanthium macrocarpum var. glabratum]
                                                   [Xanthium occidentale]
                                                   [Xanthium oligacanthum]
                                                   [Xanthium orientale]
                                                   [Xanthium oviforme]
                                                   [Xanthium pensylvanicum]
                                                   [Xanthium saccharatum]
                                                   [Xanthium speciosum]
                                                   [Xanthium strumarium ssp. italicum]
                                                   [Xanthium strumarium var. canadense]
                                                   [Xanthium strumarium var. glabratum]
                                                   [Xanthium strumarium var. oviforme]
                                                   [Xanthium strumarium var. pensylvanicum]
                                                   [Xanthium strumarium var. strumarium]
                                                   [Xanthium varians]
                                                   [Xanthium wootonii]
                                     Xanthocephalum
                                             Xanthocephalum gymnospermoides
                                     Xeranthemum
                                     Xerochrysum
                                           [Bracteantha]
                                             Xerochrysum bracteatum
                                                   [Bracteantha bracteata]
                                                   [Xeranthemum bracteatum]
                                     Ximenesia
                                             Ximenesia encelioides
                                               Ximenesia encelioides var. cana
                                               Ximenesia encelioides var. exauriculata
                                               Ximenesia encelioides var. nana
                                             Ximenesia exauriculata
                                             Ximenesia microptera
                                             Ximenesia nana
                                     Xylorhiza
                                             Xylorhiza cognata
                                                   [Aster cognatus]
                                                   [Aster standleyi]
                                                   [Machaeranthera cognata]
                                                   [Xylorhiza standleyi]
                                             Xylorhiza coloradoensis
                                             Xylorhiza confertifolia
                                                   [Machaeranthera confertifolia]
                                                   [Machaeranthera glabriuscula var. confertifolia]
                                             Xylorhiza cronquistii
                                                   [Machaeranthera cronquistii]
                                             Xylorhiza glabriuscula
                                                   [Aster glabriuscula var. parryi]
                                                   [Aster glabriuscula]
                                                   [Aster parryi]
                                                   [Aster xylorhiza]
                                                   [Machaeranthera glabriuscula var. villosa]
                                                   [Machaeranthera glabriuscula]
                                                   [Machaeranthera linearifolia]
                                                   [Xylorhiza glabriuscula var. glabriuscula]
                                                   [Xylorhiza glabriuscula var. linearifolia]
                                                   [Xylorhiza glabriuscula var. villosa]
                                                   [Xylorhiza villosa]
                                             Xylorhiza lanceolata
                                             Xylorhiza orcuttii
                                                   [Aster orcuttii]
                                                   [Machaeranthera orcuttii]
                                             Xylorhiza scopulorum
                                             Xylorhiza tortifolia
                                               Xylorhiza tortifolia var. imberbis
                                                     [Machaeranthera tortifolia var. imberbis]
                                               Xylorhiza tortifolia var. tortifolia
                                                     [Aplopappus tortifolius]
                                             Xylorhiza venusta
                                                   [Aster venustus]
                                                   [Machaeranthera venusta]
                                             Xylorhiza wrightii
                                                   [Aster wrightii]
                                                   [Machaeranthera wrightii]
                                                   [Townsendia wrightii]
                                     Yermo
                                             Yermo xanthocephalus
                                     Youngia
                                             Youngia japonica
                                                   [Youngia japonica ssp. elstonii]
                                                   [Youngia japonica var. japonica]
                                                   [Youngia thunbergiana]
                                     Zaluzania
                                             Zaluzania grayana
                                                   [Viguiera triloba]
                                     Zexmenia
                                     Zinnia
                                             Zinnia acerosa
                                                   [Zinnia pumila]
                                             Zinnia angustifolia
                                             Zinnia anomala
                                             Zinnia grandiflora
                                                   [Crassina grandiflora]
                                             Zinnia maritima
                                             Zinnia palmeri
                                                   [Zinnia maritima var. palmeri]
                                             Zinnia peruviana
                                                   [Crassina multiflora]
                                                   [Zinnia multiflora]
                                                   [Zinnia pauciflora]
                                             Zinnia violacea
                                                   [Crassina elegans]
                                                   [Zinnia elegans]
                                     Zollikoferia

Problematic Rooting (164803)
                                               Aster lanceolatus ssp. interior
                                               Aster lanceolatus ssp. simplex
                                               Aster lanceolatus var. lanceolatus
                                               Aster lanceolatus var. latifolius
                                               Aster lanceolatus var. simplex

Problematic Rooting (164959)
                                               Aster tenuifolius var. ramosissimus

Problematic Rooting (166088)
                                             Cnicus breweri
                                             Cnicus drummondii
                                             Cnicus undulatus

Problematic Rooting (166609)
                                             Plummera ambigens
                                             Plummera floribunda

Problematic Rooting (166854)
                                             Cacalia porophyllum

Problematic Rooting (166860)
                                             Chamomilla maritima