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  Plantae
      Magnoliophyta
         Eudicots
             Core Eudicots
               Asterids
               Lamiids
                    Lamiales
                            Plantaginaceae
                                   [Plantago truncata var. truncata]
                                   [Plantago truncata]
                                     Amphianthus
                                     Angelonia
                                             Angelonia angustifolia
                                             Angelonia gardneri
                                             Angelonia salicariifolia
                                     Antirrhinum
                                             Antirrhinum bellidifolium
                                             Antirrhinum maculatum
                                             Antirrhinum majus
                                             Antirrhinum uniflorum
                                             Antirrhinum vexillo-calyculatum
                                     Asarina
                                     Bacopa
                                             Bacopa acuminata
                                               Bacopa acuminata var. microphylla
                                             Bacopa caroliniana
                                                   [Hydrotrida caroliniana]
                                             Bacopa egensis
                                             Bacopa eisenii
                                             Bacopa innominata
                                                   [Bacopa cyclophylla]
                                                   [Bacopa stragula]
                                                   [Herpestis rotundifolia]
                                             Bacopa monnieri
                                                   [Bramia monnieri]
                                                   [Lysimachia monnieri]
                                             Bacopa procumbens
                                             Bacopa repens
                                                   [Gratiola repens]
                                                   [Macuillamia obovata]
                                                   [Macuillamia repens]
                                             Bacopa rotundifolia
                                                   [Bacopa nobsiana]
                                                   [Bacopa simulans]
                                                   [Bramia rotundifolia]
                                                   [Hydranthelium rotundifolium]
                                                   [Macuillamia rotundifolia]
                                             Bacopa stricta
                                                   [Caconapea stricta]
                                     Bramia
                                     Caconapea
                                     Chaenorhinum
                                           [Chaenarrhinum]
                                           [Chaenorrhinum]
                                             Chaenorhinum calycinum
                                                   [Antirrhinum calycinum]
                                             Chaenorhinum minus
                                                   [Chaenarrhinum minus]
                                               Chaenorhinum minus ssp. minus
                                     Chelone
                                             Chelone cuthbertii
                                                   [Chelone grimesii]
                                             Chelone filiformis
                                             Chelone glabra
                                                   [Chelone chlorantha]
                                                   [Chelone glabra var. chlorantha]
                                                   [Chelone glabra var. dilatata]
                                                   [Chelone glabra var. elatior]
                                                   [Chelone glabra var. elongata]
                                                   [Chelone glabra var. glabra]
                                                   [Chelone glabra var. linifolia]
                                                   [Chelone glabra var. ochroleuca]
                                                   [Chelone glabra var. typica]
                                                   [Chelone montana]
                                             Chelone latifolia
                                             Chelone lyonii
                                             Chelone obliqua
                                               Chelone obliqua var. erwiniae
                                               Chelone obliqua var. obliqua
                                               Chelone obliqua var. speciosa
                                             Chelone rubicunda
                                     Chionophila
                                             Chionophila jamesii
                                             Chionophila tweedyi
                                     Collinsia
                                             Collinsia antonina
                                             Collinsia austromontana
                                             Collinsia bartsiifolia
                                               Collinsia bartsiifolia var. bartsiifolia
                                               Collinsia bartsiifolia var. davidsonii
                                               Collinsia bartsiifolia var. hirsuta
                                               Collinsia bartsiifolia var. stricta
                                             Collinsia bruceae
                                             Collinsia callosa
                                             Collinsia childii
                                             Collinsia concolor
                                             Collinsia corymbosa
                                             Collinsia grandiflora
                                                   [Collinsia parviflora var. grandiflora]
                                             Collinsia greenei
                                             Collinsia heterophylla
                                               Collinsia heterophylla var. austromontana
                                                     [Collinsia austromontana]
                                               Collinsia heterophylla var. heterophylla
                                             Collinsia linearis
                                                   [Collinsia rattanii var. linearis]
                                             Collinsia multicolor
                                                   [Collinsia franciscana]
                                             Collinsia parryi
                                                   [Collinsia antonina ssp. purpurea]
                                             Collinsia parviflora
                                                   [Antirrhinum tenellum]
                                                   [Collinsia grandiflora var. pusilla]
                                                   [Collinsia parviflora var. parviflora]
                                                   [Collinsia tenella]
                                             Collinsia rattanii
                                               Collinsia rattanii ssp. glandulosa
                                               Collinsia rattanii ssp. rattanii
                                             Collinsia solitaria
                                             Collinsia sparsiflora
                                               Collinsia sparsiflora var. arvensis
                                               Collinsia sparsiflora var. bruceae
                                                     [Collinsia bruceae]
                                               Collinsia sparsiflora var. collina
                                                     [Collinsia solitaria]
                                               Collinsia sparsiflora var. sparsiflora
                                             Collinsia tinctoria
                                             Collinsia torreyi
                                               Collinsia torreyi var. brevicarinata
                                               Collinsia torreyi var. latifolia
                                               Collinsia torreyi var. torreyi
                                               Collinsia torreyi var. wrightii
                                                     [Collinsia wrightii]
                                             Collinsia verna
                                             Collinsia violacea
                                             Collinsia wrightii
                                     Conobea
                                     Cymbalaria
                                             Cymbalaria muralis
                                                   [Linaria cymbalaria]
                                     Digitalis
                                             Digitalis ferruginea
                                             Digitalis grandiflora
                                                   [Digitalis ambigua]
                                                   [Digitalis orientalis]
                                             Digitalis lanata
                                             Digitalis lutea
                                             Digitalis mariana
                                               Digitalis mariana ssp. heywoodii
                                                     [Digitalis purpurea ssp. heywoodii]
                                             Digitalis purpurea
                                                   [Digitalis purpurea var. alba]
                                               Digitalis purpurea ssp. amandiana
                                                     [Digitalis purpurea var. amandiana]
                                               Digitalis purpurea ssp. heywoodii
                                               Digitalis purpurea ssp. purpurea
                                                     [Digitalis purpurea var. purpurea]
                                                     [Digitalis purpurea var. tomentosa]
                                     Dopatrium
                                             Dopatrium junceum
                                     Epixiphium
                                             Epixiphium wislizeni
                                                   [Antirrhinum wislizeni]
                                                   [Asarina wislizeni]
                                                   [Maurandya wislizeni]
                                                   [Maurandya wislizenii]
                                     Erinus
                                             Erinus alpinus
                                     Galvezia
                                     Gambelia
                                             Gambelia speciosa
                                                   [Galvezia speciosa]
                                     Globifera
                                     Gratiola
                                             Gratiola amphiantha
                                                   [Amphianthus pusillus]
                                             Gratiola aurea
                                                   [Gratiola aurea var. obtusa]
                                                   [Gratiola lutea]
                                             Gratiola brevifolia
                                             Gratiola ebracteata
                                             Gratiola flava
                                             Gratiola floridana
                                             Gratiola graniticola
                                             Gratiola heterosepala
                                             Gratiola hispida
                                                   [Gratiola subulata]
                                                   [Sophronanthe hispida]
                                             Gratiola involucrata
                                             Gratiola montana
                                             Gratiola neglecta
                                                   [Gratiola neglecta var. glaberrima]
                                             Gratiola officinalis
                                             Gratiola pilosa
                                                   [Gratiola pilosa var. epilis]
                                                   [Sophronanthe pilosa]
                                                   [Tragiola pilosa ssp. epilis]
                                                   [Tragiola pilosa]
                                             Gratiola quartermaniae
                                             Gratiola ramosa
                                             Gratiola sphaerocarpa
                                             Gratiola virginiana
                                               Gratiola virginiana var. aestuariorum
                                               Gratiola virginiana var. virginiana
                                                     [Gratiola sphaerocarpa]
                                             Gratiola viscidula
                                                   [Gratiola viscidula ssp. shortii]
                                                   [Gratiola viscidula ssp. viscidula]
                                                   [Gratiola viscidula var. shortii]
                                                   [Gratiola viscosa]
                                     Hebe
                                             Hebe X franciscana
                                                   [Veronica decussata]
                                                   [Veronica franciscana]
                                             Hebe speciosa
                                                   [Veronica speciosa]
                                             Hebe venustula
                                     Herpestis
                                     Holmgrenanthe
                                             Holmgrenanthe petrophila
                                                   [Asarina petrophila]
                                                   [Maurandella petrophila]
                                                   [Maurandya petrophila]
                                     Howelliella
                                             Howelliella ovata
                                                   [Antirrhinum ovatum]
                                     Hydranthelium
                                     Hydrotrida
                                     Keckiella
                                             Keckiella antirrhinoides
                                               Keckiella antirrhinoides ssp. antirrhinoides
                                                     [Keckiella antirrhinoides var. antirrhinoides]
                                                     [Penstemon antirrhinoides]
                                               Keckiella antirrhinoides ssp. microphylla
                                                     [Keckiella antirrhinoides var. microphylla]
                                                     [Penstemon antirrhinoides ssp. microphyllus]
                                                     [Penstemon microphyllus]
                                             Keckiella breviflora
                                               Keckiella breviflora ssp. breviflora
                                                     [Keckiella breviflora var. breviflora]
                                                     [Penstemon breviflorus]
                                               Keckiella breviflora ssp. glabrisepala
                                                     [Keckiella breviflora var. glabrisepala]
                                                     [Penstemon breviflorus ssp. glabrisepalus]
                                             Keckiella cordifolia
                                                   [Penstemon cordifolius]
                                             Keckiella corymbosa
                                                   [Penstemon corymbosus]
                                             Keckiella lemmonii
                                                   [Penstemon lemmonii]
                                             Keckiella rothrockii
                                               Keckiella rothrockii ssp. jacintensis
                                                     [Keckiella rothrockii var. jacintensis]
                                                     [Penstemon rothrockii ssp. jacintensis]
                                               Keckiella rothrockii ssp. rothrockii
                                                     [Keckiella rothrockii var. rothrockii]
                                                     [Penstemon rothrockii]
                                             Keckiella ternata
                                               Keckiella ternata ssp. septentrionalis
                                                     [Keckiella ternata var. septentrionalis]
                                                     [Penstemon ternatus ssp. septentrionalis]
                                               Keckiella ternata ssp. ternata
                                                     [Keckiella ternata var. ternata]
                                                     [Penstemon ternatus]
                                     Kickxia
                                             Kickxia elatine
                                                   [Antirrhinum elatine]
                                                   [Linaria elatine]
                                             Kickxia spuria
                                                   [Antirrhinum spurium]
                                     Lagotis
                                             Lagotis glauca
                                               Lagotis glauca ssp. glauca
                                                     [Lagotis glauca var. glauca]
                                               Lagotis glauca ssp. lanceolata
                                                     [Lagotis glauca ssp. minor]
                                                     [Lagotis glauca var. stelleri]
                                                     [Lagotis minor]
                                                     [Lagotis stelleri]
                                             Lagotis minor
                                             Lagotis stelleri
                                     Leiostemon
                                             Leiostemon ambiguus
                                     Leptandra
                                     Leucospora
                                             Leucospora multifida
                                                   [Conobea multifida]
                                     Limnophila
                                             Limnophila X ludoviciana
                                             Limnophila aromatica
                                             Limnophila fragrans
                                             Limnophila indica
                                                   [Hottonia indica]
                                             Limnophila sessiliflora
                                     Linaria
                                             Linaria X hybrida
                                             Linaria X sepium
                                             Linaria aeruginea
                                             Linaria angustissima
                                                   [Linaria italica]
                                             Linaria bipartita
                                             Linaria canadensis
                                               Linaria canadensis var. texana
                                             Linaria dalmatica
                                               Linaria dalmatica ssp. dalmatica
                                                     [Linaria genistifolia ssp. dalmatica]
                                                     [Linaria jattae]
                                               Linaria dalmatica ssp. macedonica
                                                     [Linaria dalmatica var. macedonica]
                                                     [Linaria macedonica]
                                             Linaria elatine
                                             Linaria floridana
                                             Linaria genistifolia
                                               Linaria genistifolia ssp. genistifolia
                                                     [Linaria genistifolia var. genistifolia]
                                               Linaria genistifolia ssp. dalmatica
                                             Linaria granidflora
                                             Linaria incarnata
                                             Linaria jattae
                                             Linaria macedonica
                                             Linaria maroccana
                                             Linaria pinifolia
                                             Linaria purpurea
                                             Linaria repens
                                             Linaria reticulata
                                             Linaria spartea
                                             Linaria supina
                                               Linaria supina ssp. supina
                                             Linaria texana
                                             Linaria vulgaris
                                                   [Linaria linaria]
                                     Lindernia
                                           [Ilysanthes]
                                             Lindernia antipoda
                                                   [Ruellia antipoda]
                                             Lindernia brucei
                                             Lindernia ciliata
                                             Lindernia crustacea
                                                   [Capraria crustacea]
                                                   [Lindernia crustacea var. smithii]
                                                   [Torenia crustacea]
                                             Lindernia diffusa
                                                   [Vandellia diffusa]
                                             Lindernia dubia
                                                   [Gratiola dubia]
                                                   [Ilysanthes anagallidea]
                                                   [Ilysanthes attenuata]
                                                   [Ilysanthes dubia]
                                                   [Ilysanthes inequalis]
                                                   [Lindernia anagallidea]
                                                   [Lindernia dubia var. anagallidea]
                                                   [Lindernia dubia var. dubia]
                                                   [Lindernia dubia var. inundata]
                                                   [Lindernia dubia var. major]
                                                   [Lindernia dubia var. riparia]
                                                   [Lindernia dubia var. typica]
                                                   [Lindernia pyxidaria]
                                               Lindernia dubia var. anagallidea
                                             Lindernia ellobum
                                             Lindernia grandiflora
                                                   [Ilysanthes grandiflora]
                                             Lindernia monticola
                                                   [Ilysanthes monticola]
                                                   [Ilysanthes saxicola]
                                                   [Lindernia saxicola]
                                             Lindernia procumbens
                                                   [Lindernia probescens]
                                             Lindernia verticillata
                                     Littorella
                                             Littorella uniflora
                                                   [Littorella americana]
                                                   [Littorella uniflora var. americana]
                                     Lophospermum
                                             Lophospermum erubescens
                                                   [Asarina erubescens]
                                     Mabrya
                                             Mabrya acerifolia
                                                   [Asarina acerifolia]
                                                   [Maurandya acerifolia]
                                     Macuillamia
                                     Maurandella
                                             Maurandella antirrhiniflora
                                                   [Antirrhinum maurandioides]
                                                   [Asarina antirrhiniflora]
                                                   [Maurandya antirrhiniflora]
                                     Maurandya
                                             Maurandya barclaiana
                                     Mecardonia
                                             Mecardonia acuminata
                                               Mecardonia acuminata var. acuminata
                                                     [Bacopa acuminata]
                                                     [Pagesia acuminata]
                                               Mecardonia acuminata var. microphylla
                                                     [Bacopa acuminata var. microphylla]
                                               Mecardonia acuminata var. peninsularis
                                             Mecardonia procumbens
                                                   [Bacopa procumbens]
                                                   [Mecardonia dianthera]
                                                   [Mecardonia peduncularis]
                                                   [Mecardonia tenuis]
                                                   [Mecardonia vandellioides]
                                     Micranthemum
                                           [Hemianthus]
                                             Micranthemum callitrichoides
                                             Micranthemum glomeratum
                                                   [Hemianthus glomeratus]
                                             Micranthemum micranthemoides
                                                   [Hemianthus micranthemoides]
                                             Micranthemum umbrosum
                                                   [Globifera umbrosa]
                                                   [Hemianthus callitrichoides]
                                     Misopates
                                             Misopates orontium
                                                   [Antirrhinum orontium var. grandiflorum]
                                                   [Antirrhinum orontium]
                                     Mohavea
                                             Mohavea breviflora
                                             Mohavea confertiflora
                                     Neogaerrhinum
                                             Neogaerrhinum filipes
                                                   [Antirrhinum cooperi]
                                                   [Antirrhinum filipes]
                                                   [Asarina filipes]
                                             Neogaerrhinum strictum
                                                   [Antirrhinum hookerianum]
                                                   [Antirrhinum kelloggii]
                                                   [Asarina stricta]
                                                   [Neogaerrhinum kelloggii]
                                     Nothochelone
                                             Nothochelone nemorosa
                                                   [Penstemon nemorosus]
                                     Nuttallanthus
                                             Nuttallanthus canadensis
                                                   [Linaria canadensis]
                                             Nuttallanthus floridanus
                                                   [Linaria floridana]
                                             Nuttallanthus texanus
                                                   [Linaria canadensis var. texana]
                                                   [Linaria texana]
                                     Pagesia
                                             Pagesia acuminata
                                     Penstemon
                                             Penstemon X bryantiae
                                                   [Penstemon bryantiae]
                                             Penstemon X crideri
                                             Penstemon X dubius
                                             Penstemon X jonesii
                                                   [Penstemon jonesi]
                                             Penstemon X mirus
                                             Penstemon X parishii
                                             Penstemon X peirsonii
                                             Penstemon abietinus
                                             Penstemon absarokensis
                                             Penstemon acaulis
                                               Penstemon acaulis var. yampaënsis
                                             Penstemon acuminatus
                                               Penstemon acuminatus var. acuminatus
                                               Penstemon acuminatus var. latebracteatus
                                             Penstemon alamosensis
                                             Penstemon albertinus
                                             Penstemon albidus
                                             Penstemon albomarginatus
                                                   [Penstemon albomarginalis]
                                             Penstemon ambiguus
                                               Penstemon ambiguus var. ambiguus
                                                     [Leiostemon ambiguus]
                                               Penstemon ambiguus var. laevissimus
                                                     [Penstemon ambiguus ssp. laevissimus]
                                             Penstemon ammophilus
                                                   [Penstemon ammophilum]
                                             Penstemon anguineus
                                                   [Penstemon rattanii var. minor]
                                             Penstemon angustifolius
                                               Penstemon angustifolius var. angustifolius
                                               Penstemon angustifolius var. caudatus
                                                     [Penstemon angustifolius ssp. caudatus]
                                                     [Penstemon caudatus]
                                               Penstemon angustifolius var. dulcis
                                               Penstemon angustifolius var. venosus
                                                     [Penstemon angustifolius ssp. venosus]
                                                     [Penstemon venosus]
                                               Penstemon angustifolius var. vernalensis
                                               Penstemon angustifolius ssp. angustifolius
                                               Penstemon angustifolius ssp. caudatus
                                             Penstemon antirrhinoides
                                               Penstemon antirrhinoides ssp. microphyllus
                                             Penstemon arenarius
                                                   [Penstemon maguirei]
                                             Penstemon arenicola
                                             Penstemon aridus
                                             Penstemon arkansanus
                                                   [Penstemon multicaulis]
                                                   [Penstemon pallidus ssp. arkansanus]
                                                   [Penstemon wherryi]
                                             Penstemon assurgens
                                             Penstemon attenuatus
                                               Penstemon attenuatus var. attenuatus
                                               Penstemon attenuatus var. militaris
                                                     [Penstemon assurgens]
                                                     [Penstemon attenuatus ssp. militaris]
                                               Penstemon attenuatus var. palustris
                                                     [Penstemon attenuatus ssp. palustris]
                                               Penstemon attenuatus var. pseudoprocerus
                                                     [Penstemon attenuatus ssp. pseudoprocerus]
                                             Penstemon atwoodii
                                             Penstemon auriberbis
                                                   [Penstemon parviflorus]
                                             Penstemon australis
                                                   [Penstemon australis ssp. australis]
                                             Penstemon azureus
                                               Penstemon azureus var. angustissimus
                                                     [Penstemon azureus ssp. angustissimus]
                                               Penstemon azureus var. azureus
                                                     [Penstemon azureus ssp. azureus]
                                             Penstemon baccharifolius
                                             Penstemon barbatus
                                               Penstemon barbatus var. barbatus
                                                     [Penstemon barbatus ssp. barbatus]
                                                     [Penstemon barbatus var. puberulus]
                                               Penstemon barbatus var. torreyi
                                                     [Penstemon barbatus ssp. torreyi]
                                                     [Penstemon torreyi]
                                               Penstemon barbatus var. trichander
                                                     [Penstemon barbatus ssp. trichander]
                                                     [Penstemon barbatus var. trichanderi]
                                               Penstemon barbatus ssp. torreyi
                                               Penstemon barbatus ssp. trichander
                                             Penstemon barnebyi
                                             Penstemon barrettiae
                                             Penstemon bicolor
                                                   [Penstemon bicolor ssp. bicolor]
                                                   [Penstemon bicolor ssp. roseus]
                                             Penstemon bleaklyi
                                             Penstemon bracteatus
                                             Penstemon brandegei
                                             Penstemon breviculus
                                                   [Penstemon jamesii ssp. breviculus]
                                             Penstemon breviflorus
                                               Penstemon breviflorus ssp. glabrisepalus
                                             Penstemon brevisepalus
                                             Penstemon bridgesii
                                             Penstemon buckleyi
                                             Penstemon caesius
                                             Penstemon caespitosus
                                               Penstemon caespitosus var. caespitosus
                                               Penstemon caespitosus var. desertipicti
                                                     [Penstemon caespitosus ssp. desertipicti]
                                               Penstemon caespitosus var. perbrevis
                                                     [Penstemon caespitosus ssp. perbrevis]
                                             Penstemon calcareus
                                             Penstemon californicus
                                             Penstemon calycosus
                                                   [Penstemon laevigatus ssp. calycosus]
                                             Penstemon campanulatus
                                                   [Penstemon campanulatus f. pulchellus]
                                                   [Penstemon pulchellus]
                                               Penstemon campanulatus var. chihuahuensis
                                                     [Penstemon campanulatus ssp. chihuahuensis]
                                             Penstemon canescens
                                                   [Penstemon brittoniorum]
                                                   [Penstemon canescens var. brittoniorum]
                                                   [Penstemon canescens var. typicus]
                                             Penstemon cardinalis
                                               Penstemon cardinalis ssp. cardinalis
                                               Penstemon cardinalis ssp. regalis
                                             Penstemon cardwellii
                                             Penstemon carnosus
                                             Penstemon caryi
                                             Penstemon centranthifolius
                                             Penstemon cinicola
                                             Penstemon clevelandii
                                                   [Penstemon cleavelandii]
                                               Penstemon clevelandii var. clevelandii
                                                     [Penstemon cleavelandii var. cleavelandii]
                                                     [Penstemon clevelandii ssp. clevelandii]
                                               Penstemon clevelandii var. connatus
                                                     [Penstemon cleavelandii var. connatus]
                                                     [Penstemon clevelandii ssp. connatus]
                                               Penstemon clevelandii var. mohavensis
                                                     [Penstemon cleavelandii var. mohavensis]
                                                     [Penstemon clevelandii ssp. mohavensis]
                                             Penstemon clutei
                                             Penstemon cobaea
                                               Penstemon cobaea var. cobaea
                                                     [Penstemon cobaea ssp. typicus]
                                               Penstemon cobaea var. purpureus
                                                     [Penstemon cobaea ssp. purpureus]
                                             Penstemon comarrhenus
                                             Penstemon compactus
                                                   [Penstemon cyananthus ssp. compactus]
                                                   [Penstemon cyananthus var. compactus]
                                             Penstemon concinnus
                                             Penstemon confertus
                                               Penstemon confertus ssp. procerus
                                             Penstemon confusus
                                             Penstemon cordifolius
                                             Penstemon corymbosus
                                             Penstemon crandallii
                                               Penstemon crandallii ssp. atratus
                                                     [Penstemon crandallii var. atractus]
                                                     [Penstemon crandallii var. atratus]
                                               Penstemon crandallii ssp. crandallii
                                                     [Penstemon suffrutescens]
                                               Penstemon crandallii ssp. glabrescens
                                                     [Penstemon crandallii ssp. taosensis]
                                                     [Penstemon crandallii var. glabrescens]
                                                     [Penstemon linarioides ssp. taosensis]
                                               Penstemon crandallii ssp. procumbens
                                             Penstemon cusickii
                                             Penstemon cyananthus
                                               Penstemon cyananthus var. cyananthus
                                               Penstemon cyananthus var. judyae
                                               Penstemon cyananthus var. subglaber
                                                     [Penstemon cyananthus ssp. subglaber]
                                                     [Penstemon holmgrenii]
                                             Penstemon cyaneus
                                             Penstemon cyanocaulis
                                             Penstemon cyathophorus
                                             Penstemon dasyphyllus
                                             Penstemon davidsonii
                                               Penstemon davidsonii var. davidsonii
                                                     [Penstemon menziesii ssp. davidsonii]
                                                     [Penstemon menziesii ssp. thompsonii]
                                               Penstemon davidsonii var. menziesii
                                                     [Penstemon davidsonii ssp. menziesii]
                                                     [Penstemon menziesii]
                                               Penstemon davidsonii var. praeteritus
                                             Penstemon deamii
                                                   [Penstemon laevigatus ssp. deamii]
                                                   [Penstemon laevigatus var. deamii]
                                             Penstemon deaveri
                                                   [Penstemon virgatus ssp. arizonicus]
                                             Penstemon debilis
                                             Penstemon degeneri
                                             Penstemon deustus
                                               Penstemon deustus var. deustus
                                               Penstemon deustus var. pedicellatus
                                                     [Penstemon deustus ssp. heterander]
                                                     [Penstemon deustus var. heterander]
                                               Penstemon deustus var. suffrutescens
                                               Penstemon deustus var. variabilis
                                                     [Penstemon deustus ssp. variabilis]
                                                     [Penstemon variabilis]
                                             Penstemon digitalis
                                                   [Penstemon alluviorum]
                                                   [Penstemon laevigatus ssp. alluviorum]
                                                   [Penstemon laevigatus ssp. digitalis]
                                                   [Penstemon laevigatus var. angulatus]
                                             Penstemon diphyllus
                                                   [Penstemon triphyllus ssp. diphyllus]
                                             Penstemon discolor
                                             Penstemon dissectus
                                             Penstemon distans
                                             Penstemon dolius
                                                   [Penstemon dolius var. dolius]
                                             Penstemon duchesnensis
                                                   [Penstemon dolius var. duchesnensis]
                                             Penstemon eatonii
                                               Penstemon eatonii ssp. eatonii
                                                     [Penstemon eatonii var. eatonii]
                                               Penstemon eatonii ssp. exsertus
                                             Penstemon eatonii ssp eatonii
                                               Penstemon eatonii ssp. undosus
                                                     [Penstemon eatonii var. undosus]
                                             Penstemon elegantulus
                                             Penstemon ellipticus
                                                   [Penstemon davidsonii var. ellipticus]
                                             Penstemon eriantherus
                                               Penstemon eriantherus var. argillosus
                                                     [Penstemon whitedii ssp. dayanus]
                                               Penstemon eriantherus var. cleburnei
                                                     [Penstemon cleburnei]
                                               Penstemon eriantherus var. eriantherus
                                               Penstemon eriantherus var. redactus
                                                     [Penstemon whitedii ssp. tristis]
                                               Penstemon eriantherus var. whitedii
                                                     [Penstemon whitedii]
                                             Penstemon euglaucus
                                             Penstemon fendleri
                                             Penstemon filiformis
                                             Penstemon flavescens
                                             Penstemon floribundus
                                             Penstemon floridus
                                               Penstemon floridus var. austinii
                                                     [Penstemon floridus ssp. austinii]
                                               Penstemon floridus var. floridus
                                             Penstemon flowersii
                                             Penstemon francisci-pennellii
                                             Penstemon franklinii
                                             Penstemon fremontii
                                               Penstemon fremontii var. fremontii
                                               Penstemon fremontii var. glabrescens
                                             Penstemon fruticiformis
                                               Penstemon fruticiformis var. amargosae
                                                     [Penstemon fruticiformis ssp. amargosae]
                                               Penstemon fruticiformis var. fruticiformis
                                                     [Penstemon fruticiformis ssp. fruticiformis]
                                             Penstemon fruticosus
                                               Penstemon fruticosus var. fruticosus
                                               Penstemon fruticosus var. scouleri
                                                     [Penstemon fruticosus ssp. scouleri]
                                                     [Penstemon scouleri]
                                               Penstemon fruticosus var. serratus
                                                     [Penstemon fruticosus ssp. serratus]
                                             Penstemon gairdneri
                                               Penstemon gairdneri var. gairdneri
                                                     [Penstemon gairdneri ssp. hians]
                                                     [Penstemon gairdneri var. hians]
                                               Penstemon gairdneri var. oreganus
                                                     [Penstemon gairdneri ssp. oreganus]
                                                     [Penstemon puberulentus]
                                             Penstemon gentianoides
                                             Penstemon gibbensii
                                             Penstemon glaber
                                               Penstemon glaber var. alpinus
                                                     [Penstemon alpinus var. alpinus]
                                                     [Penstemon alpinus]
                                               Penstemon glaber var. brandegeei
                                                     [Penstemon alpinus ssp. brandegeei]
                                                     [Penstemon brandegeei]
                                               Penstemon glaber var. glaber
                                                     [Penstemon alpinus ssp. magnus]
                                                     [Penstemon alpinus var. nagnus]
                                             Penstemon glandulosus
                                               Penstemon glandulosus var. chelanensis
                                                     [Penstemon glandulosus ssp. chelanensis]
                                               Penstemon glandulosus var. glandulosus
                                             Penstemon glaucinus
                                             Penstemon globosus
                                             Penstemon goodrichii
                                             Penstemon gormanii
                                             Penstemon gracilentus
                                             Penstemon gracilis
                                                   [Penstemon glaucus]
                                                   [Penstemon gracilis ssp. wisconsinensis]
                                                   [Penstemon gracilis var. gracilis]
                                                   [Penstemon gracilis var. wisconsinensis]
                                                   [Penstemon wisconsinensis]
                                             Penstemon grahamii
                                             Penstemon grandiflorus
                                                   [Penstemon bradburii]
                                             Penstemon gratus
                                             Penstemon griffinii
                                             Penstemon grinnellii
                                                   [Penstemon grinnellii ssp. grinnellii]
                                                   [Penstemon grinnellii ssp. scrophularioides]
                                                   [Penstemon grinnellii var. grinnellii]
                                                   [Penstemon grinnellii var. scrophularioides]
                                             Penstemon guadalupensis
                                                   [Penstemon guadalupensis var. ernstii]
                                             Penstemon hallii
                                             Penstemon harbourii
                                             Penstemon harringtonii
                                                   [Penstemon harringtoni]
                                             Penstemon hartwegii
                                             Penstemon havardii
                                                   [Penstemon harvardii]
                                             Penstemon haydenii
                                             Penstemon helleri
                                             Penstemon heterodoxus
                                               Penstemon heterodoxus var. cephalophorus
                                                     [Penstemon heterodoxus ssp. cephalophorus]
                                               Penstemon heterodoxus var. heterodoxus
                                                     [Penstemon heterodoxus ssp. heterodoxus]
                                               Penstemon heterodoxus var. shastensis
                                                     [Penstemon shastensis]
                                             Penstemon heterophyllus
                                               Penstemon heterophyllus var. australis
                                                     [Penstemon heterophyllus ssp. australis]
                                               Penstemon heterophyllus var. heterophyllus
                                                     [Penstemon heterophyllus ssp. heterophyllus]
                                               Penstemon heterophyllus var. purdyi
                                                     [Penstemon heterophyllus ssp. purdyi]
                                                     [Penstemon spinulosus]
                                             Penstemon hirsutus
                                                   [Penstemon hirsutus var. hirsutus]
                                                   [Penstemon hirsutus var. minimus]
                                                   [Penstemon hirsutus var. pygmaeus]
                                             Penstemon holmgrenii
                                             Penstemon humilis
                                               Penstemon humilis var. brevifolius
                                                     [Penstemon humilis ssp. brevifolius]
                                               Penstemon humilis var. humilis
                                                     [Penstemon cinereus ssp. foliatus]
                                                     [Penstemon cinereus var. foliatus]
                                                     [Penstemon cinereus]
                                                     [Penstemon decurvus]
                                                     [Penstemon humilis ssp. humilis]
                                                     [Penstemon humilis var. deserticus]
                                               Penstemon humilis var. obtusifolius
                                                     [Penstemon humilis ssp. obtusifolius]
                                             Penstemon idahoensis
                                             Penstemon immanifestus
                                             Penstemon incertus
                                             Penstemon inflatus
                                             Penstemon jamesii
                                                   [Penstemon brevibarbatus]
                                                   [Penstemon jamesii ssp. typicus]
                                                   [Penstemon jamesii var. jamesii]
                                             Penstemon janishiae
                                             Penstemon keckii
                                             Penstemon kingii
                                                   [Penstemon nyeensis]
                                             Penstemon labrosus
                                             Penstemon laetus
                                               Penstemon laetus var. laetus
                                                     [Penstemon laetus ssp. laetus]
                                               Penstemon laetus var. leptosepalus
                                                     [Penstemon laetus ssp. leptosepalus]
                                               Penstemon laetus var. sagittatus
                                                     [Penstemon laetus ssp. sagittatus]
                                             Penstemon laevigatus
                                                   [Penstemon penstemon]
                                             Penstemon laevis
                                             Penstemon lanceolatus
                                                   [Penstemon pauciflorus]
                                                   [Penstemon ramosus]
                                             Penstemon laricifolius
                                               Penstemon laricifolius var. exilifolius
                                                     [Penstemon laricifolius ssp. exilifolius]
                                               Penstemon laricifolius var. laricifolius
                                                     [Penstemon laricifolius ssp. laricifolius]
                                               Penstemon laricifolius ssp. exilifolius
                                             Penstemon lasiostemon
                                             Penstemon laxiflorus
                                                   [Penstemon australis ssp. laxiflorus]
                                                   [Penstemon australis var. ameles]
                                             Penstemon laxus
                                                   [Penstemon watsonii ssp. laxus]
                                             Penstemon leiophyllus
                                               Penstemon leiophyllus var. francisci-pennellii
                                                     [Penstemon francisci-pennellii]
                                               Penstemon leiophyllus var. keckii
                                                     [Penstemon keckii]
                                               Penstemon leiophyllus var. leiophyllus
                                             Penstemon lemhiensis
                                                   [Penstemon speciosus ssp. lemhiensis]
                                             Penstemon lemmonii
                                             Penstemon lentus
                                               Penstemon lentus var. albiflorus
                                                     [Penstemon lentus ssp. albiflorus]
                                               Penstemon lentus var. lentus
                                             Penstemon leonardii
                                               Penstemon leonardii var. higginsii
                                               Penstemon leonardii var. leonardii
                                               Penstemon leonardii var. patricus
                                                     [Penstemon patricus]
                                             Penstemon linarioides
                                               Penstemon linarioides ssp. coloradoensis
                                                     [Penstemon coloradoensis]
                                               Penstemon linarioides ssp. linarioides
                                                     [Penstemon linarioides ssp. compactifolius]
                                                     [Penstemon linarioides ssp. typicus]
                                               Penstemon linarioides ssp. maguirei
                                               Penstemon linarioides ssp. sileri
                                                     [Penstemon linarioides var. sileri]
                                                     [Penstemon linarioides var. viridis]
                                             Penstemon longiflorus
                                                   [Penstemon cyananthus ssp. longiflorus]
                                                   [Penstemon cyananthus var. longiflorus]
                                             Penstemon lyallii
                                             Penstemon marcusii
                                                   [Penstemon moffatii ssp. marcusii]
                                             Penstemon mensarum
                                             Penstemon menziesii
                                             Penstemon metcalfei
                                             Penstemon microphyllus
                                             Penstemon miser
                                             Penstemon moffatii
                                                   [Penstemon moffatii ssp. moffatii]
                                                   [Penstemon moffatii ssp. paysonii]
                                             Penstemon monoensis
                                             Penstemon montanus
                                               Penstemon montanus var. idahoensis
                                                     [Penstemon montanus ssp. idahoensis]
                                               Penstemon montanus var. montanus
                                             Penstemon moriahensis
                                             Penstemon mucronatus
                                                   [Penstemon murcronatus]
                                                   [Penstemon pachyphyllus var. mucronatus]
                                             Penstemon multiflorus
                                             Penstemon murrayanus
                                             Penstemon nanus
                                             Penstemon navajoa
                                             Penstemon nemorosus
                                             Penstemon neomexicanus
                                             Penstemon neotericus
                                             Penstemon newberryi
                                               Penstemon newberryi var. berryi
                                                     [Penstemon newberryi ssp. berryi]
                                               Penstemon newberryi var. newberryi
                                                     [Penstemon newberryi ssp. newberryi]
                                               Penstemon newberryi var. sonomensis
                                                     [Penstemon newberryi ssp. sonomensis]
                                             Penstemon nitidus
                                               Penstemon nitidus var. nitidus
                                               Penstemon nitidus var. polyphyllus
                                                     [Penstemon nitidus ssp. polyphyllus]
                                             Penstemon nudiflorus
                                             Penstemon oklahomensis
                                             Penstemon oliganthus
                                                   [Penstemon pseudoparvus]
                                             Penstemon ophianthus
                                                   [Penstemon jamesii ssp. ophianthus]
                                             Penstemon osterhoutii
                                             Penstemon ovatus
                                             Penstemon pachyphyllus
                                               Penstemon pachyphyllus var. congestus
                                                     [Penstemon congestus]
                                                     [Penstemon pachyphyllus ssp. congestus]
                                               Penstemon pachyphyllus var. mucronatus
                                               Penstemon pachyphyllus var. pachyphyllus
                                             Penstemon pahutensis
                                             Penstemon pallidus
                                                   [Penstemon arkansanus var. pubescens]
                                             Penstemon palmeri
                                               Penstemon palmeri var. eglandulosus
                                                     [Penstemon palmeri ssp. eglandulosus]
                                               Penstemon palmeri var. macranthus
                                                     [Penstemon macranthus]
                                               Penstemon palmeri var. palmeri
                                                     [Penstemon palmeri ssp. typicus]
                                             Penstemon papillatus
                                             Penstemon parryi
                                             Penstemon parviflorus
                                             Penstemon parvulus
                                                   [Penstemon azureus var. parvulus]
                                             Penstemon parvus
                                             Penstemon patens
                                                   [Penstemon confusus ssp. patens]
                                             Penstemon patricus
                                             Penstemon payettensis
                                             Penstemon paysoniorum
                                             Penstemon peckii
                                             Penstemon penlandii
                                             Penstemon pennellianus
                                             Penstemon perpulcher
                                                   [Penstemon minidokanus]
                                             Penstemon personatus
                                             Penstemon petiolatus
                                             Penstemon pinifolius
                                             Penstemon pinorum
                                             Penstemon platyphyllus
                                             Penstemon pratensis
                                             Penstemon procerus
                                               Penstemon procerus var. aberrans
                                                     [Penstemon procerus ssp. aberrans]
                                               Penstemon procerus var. brachyanthus
                                                     [Penstemon procerus ssp. brachyanthus]
                                                     [Penstemon tolmiei ssp. brachyanthus]
                                               Penstemon procerus var. formosus
                                                     [Penstemon procerus ssp. formosus]
                                                     [Penstemon tolmiei ssp. formosus]
                                               Penstemon procerus var. modestus
                                                     [Penstemon modestus]
                                                     [Penstemon procerus ssp. modestus]
                                               Penstemon procerus var. procerus
                                                     [Penstemon confertus ssp. procerus]
                                                     [Penstemon confertus var. procerus]
                                               Penstemon procerus var. tolmiei
                                                     [Penstemon procerus ssp. tolmiei]
                                                     [Penstemon tolmiei]
                                             Penstemon pruinosus
                                             Penstemon pseudoputus
                                                   [Penstemon virgatus ssp. pseudoputus]
                                             Penstemon pseudospectabilis
                                               Penstemon pseudospectabilis ssp. connatifolius
                                               Penstemon pseudospectabilis ssp. pseudospectabilis
                                                     [Penstemon pseudospectabilis ssp. typicus]
                                             Penstemon puberulentus
                                             Penstemon pudicus
                                             Penstemon pumilus
                                             Penstemon purpusii
                                             Penstemon putus
                                                   [Penstemon virgatus ssp. putus]
                                             Penstemon radicosus
                                             Penstemon rattanii
                                               Penstemon rattanii var. kleei
                                                     [Penstemon rattanii ssp. kleei]
                                               Penstemon rattanii var. rattanii
                                                     [Penstemon rattanii ssp. rattanii]
                                             Penstemon retrorsus
                                                   [Penstemon retrosus]
                                             Penstemon rhizomatosus
                                             Penstemon richardsonii
                                               Penstemon richardsonii var. curtiflorus
                                                     [Penstemon richardsonii ssp. curtiflorus]
                                               Penstemon richardsonii var. dentatus
                                                     [Penstemon richardsonii ssp. dentatus]
                                               Penstemon richardsonii var. richardsonii
                                             Penstemon roezlii
                                                   [Penstemon cinerascens]
                                                   [Penstemon laetus ssp. roezlii]
                                                   [Penstemon laetus var. roezlii]
                                             Penstemon rostriflorus
                                                   [Penstemon bridgesii var. amplexicaulis]
                                                   [Penstemon bridgesii]
                                             Penstemon rothrockii
                                               Penstemon rothrockii ssp. jacintensis
                                             Penstemon rubicundus
                                             Penstemon rupicola
                                             Penstemon rydbergii
                                               Penstemon rydbergii var. aggregatus
                                                     [Penstemon aggregatus]
                                                     [Penstemon rydbergii ssp. aggregatus]
                                               Penstemon rydbergii var. oreocharis
                                                     [Penstemon hesperius]
                                                     [Penstemon oreocharis]
                                                     [Penstemon vaseyanus]
                                               Penstemon rydbergii var. rydbergii
                                                     [Penstemon rydbergii var. varians]
                                             Penstemon saxosorum
                                             Penstemon scapoides
                                             Penstemon scariosus
                                               Penstemon scariosus var. albifluvis
                                                     [Penstemon albifluvis]
                                               Penstemon scariosus var. cyanomontanus
                                               Penstemon scariosus var. garrettii
                                                     [Penstemon garrettii]
                                               Penstemon scariosus var. scariosus
                                             Penstemon scouleri
                                             Penstemon secundiflorus
                                                   [Penstemon unilateralis]
                                               Penstemon secundiflorus ssp. lavendulus
                                             Penstemon seorsus
                                             Penstemon sepalulus
                                             Penstemon serrulatus
                                             Penstemon shastensis
                                             Penstemon smallii
                                             Penstemon spatulatus
                                             Penstemon speciosus
                                                   [Penstemon speciosus ssp. kennedyi]
                                                   [Penstemon speciosus var. speciosus]
                                             Penstemon spectabilis
                                               Penstemon spectabilis var. spectabilis
                                                     [Penstemon spectabilis ssp. spectabilis]
                                               Penstemon spectabilis var. subviscosus
                                                     [Penstemon spectabilis ssp. subviscosus]
                                             Penstemon spinulosus
                                             Penstemon stenophyllus
                                             Penstemon stephensii
                                             Penstemon strictiformis
                                                   [Penstemon strictus ssp. strictiformis]
                                             Penstemon strictus
                                                   [Penstemon strictus ssp. angustus]
                                                   [Penstemon strictus var. strictus]
                                             Penstemon subglaber
                                             Penstemon subserratus
                                             Penstemon subulatus
                                             Penstemon sudans
                                                   [Penstemon deustus ssp. sudans]
                                             Penstemon superbus
                                             Penstemon tenuiflorus
                                             Penstemon tenuis
                                             Penstemon ternatus
                                               Penstemon ternatus ssp. septentrionalis
                                             Penstemon teucrioides
                                             Penstemon thompsoniae
                                                   [Penstemon thompsoniae ssp. jaegeri]
                                                   [Penstemon thompsoniae ssp. thompsoniae]
                                                   [Penstemon thompsoniae var. desperatus]
                                             Penstemon thurberi
                                                   [Penstemon thurberi var. anestius]
                                             Penstemon tidestromii
                                                   [Penstemon leptanthus]
                                             Penstemon tiehmii
                                             Penstemon tracyi
                                             Penstemon triflorus
                                               Penstemon triflorus var. integrifolius
                                                     [Penstemon triflorus ssp. integrifolius]
                                               Penstemon triflorus var. triflorus
                                                     [Penstemon helleri]
                                                     [Penstemon triflorus ssp. triflorus]
                                             Penstemon triphyllus
                                             Penstemon tubiflorus
                                                   [Penstemon tubiflorus var. achoreus]
                                                   [Penstemon tubiflorus var. tubiflorus]
                                             Penstemon tusharensis
                                                   [Penstemon caespitosus var. suffruticosus]
                                             Penstemon uintahensis
                                             Penstemon utahensis
                                             Penstemon variabilis
                                             Penstemon venustus
                                             Penstemon versicolor
                                             Penstemon virens
                                             Penstemon virgatus
                                               Penstemon virgatus var. asa-grayi
                                                     [Penstemon virgatus ssp. asa-grayi]
                                               Penstemon virgatus var. virgatus
                                             Penstemon virgatus ssp. asa-grayi
                                             Penstemon wardii
                                             Penstemon washingtonensis
                                             Penstemon watsonii
                                             Penstemon whippleanus
                                             Penstemon wilcoxii
                                                   [Penstemon ovatus var. pinetorum]
                                             Penstemon wrightii
                                             Penstemon yampaensis
                                                   [Penstemon acaulis var. yampaënsis]
                                     Picrorhiza
                                             Picrorhiza kurrooa
                                     Plantago
                                             Plantago argyrea
                                                   [Plantago argyraea]
                                                   [Plantago purshii var. argyraea]
                                                   [Plantago purshii var. argyrea]
                                             Plantago aristata
                                                   [Plantago aristata var. nuttallii]
                                                   [Plantago patagonica var. aristata]
                                             Plantago australis
                                               Plantago australis ssp. hirtella
                                                     [Plantago hirtella ssp. galeottiana]
                                                     [Plantago hirtella var. galeottiana]
                                                     [Plantago hirtella var. mollior]
                                                     [Plantago hirtella]
                                             Plantago bigelovii
                                               Plantago bigelovii ssp. bigelovii
                                               Plantago bigelovii ssp. californica
                                                     [Plantago californica]
                                             Plantago californica
                                             Plantago canescens
                                                   [Plantago canescens var. cylindrica]
                                                   [Plantago septata]
                                             Plantago cordata
                                             Plantago coronopus
                                                   [Plantago coronopus ssp. commutata]
                                             Plantago debilis
                                             Plantago elongata
                                               Plantago elongata ssp. elongata
                                               Plantago elongata ssp. pentasperma
                                             Plantago erecta
                                                   [Plantago erecta ssp. rigidior]
                                                   [Plantago erecta var. erecta]
                                                   [Plantago hookeriana var. californica]
                                                   [Plantago patagonica var. californica]
                                             Plantago eriopoda
                                                   [Plantago shastensis]
                                             Plantago firma
                                                   [Plantago truncata ssp. firma]
                                             Plantago hawaiensis
                                                   [Plantago hawaiensis var. laxa]
                                             Plantago helleri
                                             Plantago heterophylla
                                             Plantago hirtella
                                             Plantago hookeriana
                                                   [Plantago hookerana]
                                             Plantago juncoides
                                             Plantago lanceolata
                                                   [Plantago altissima]
                                                   [Plantago lanceolata var. sphaerostachya]
                                             Plantago macrocarpa
                                                   [Plantago macrocarpum]
                                             Plantago major
                                                   [Plantago asiatica]
                                                   [Plantago halophila]
                                                   [Plantago major ssp. intermedia]
                                                   [Plantago major var. asiatica]
                                                   [Plantago major var. intermedia]
                                                   [Plantago major var. major]
                                                   [Plantago major var. pachyphylla]
                                                   [Plantago major var. pilgeri]
                                                   [Plantago major var. scopulorum]
                                             Plantago maritima
                                                   [Plantago maritima ssp. serpentina]
                                               Plantago maritima var. californica
                                                     [Plantago juncoides var. californica]
                                               Plantago maritima var. juncoides
                                                     [Plantago juncoides var. decipiens]
                                                     [Plantago juncoides var. glauca]
                                                     [Plantago juncoides var. laurentiana]
                                                     [Plantago juncoides]
                                                     [Plantago maritima ssp. borealis]
                                                     [Plantago maritima ssp. juncoides]
                                                     [Plantago oliganthos var. fallax]
                                                     [Plantago oliganthos]
                                               Plantago maritima var. maritima
                                             Plantago media
                                                   [Plantago media var. monnieri]
                                             Plantago oliganthos
                                             Plantago ovata
                                                   [Plantago brunnea]
                                                   [Plantago fastigiata]
                                                   [Plantago gooddingii]
                                                   [Plantago insularis var. fastigiata]
                                                   [Plantago insularis var. scariosa]
                                                   [Plantago insularis]
                                                   [Plantago minima]
                                             Plantago pachyphylla
                                                   [Plantago glabrifolia]
                                                   [Plantago grayana var. abrotanelloides]
                                                   [Plantago grayana]
                                                   [Plantago hillebrandii]
                                                   [Plantago krajinae]
                                                   [Plantago krajinai]
                                                   [Plantago melanochorous]
                                                   [Plantago melanochrous]
                                                   [Plantago muscicola]
                                                   [Plantago pachyphylla var. maviensis]
                                                   [Plantago pachyphylla var. rotundifolia]
                                             Plantago patagonica
                                                   [Plantago patagonica var. breviscapa]
                                                   [Plantago patagonica var. gnaphalioides]
                                                   [Plantago patagonica var. oblonga]
                                                   [Plantago patagonica var. spinulosa]
                                                   [Plantago picta]
                                                   [Plantago purshii var. breviscapa]
                                                   [Plantago purshii var. oblonga]
                                                   [Plantago purshii var. picta]
                                                   [Plantago purshii var. spinulosa]
                                                   [Plantago purshii]
                                                   [Plantago spinulosa]
                                                   [Plantago wyomingensis]
                                             Plantago princeps
                                               Plantago princeps var. anomala
                                                     [Plantago princeps var. hirtella]
                                               Plantago princeps var. laxifolia
                                                     [Plantago princeps var. denticulata]
                                                     [Plantago princeps var. laxiflora]
                                               Plantago princeps var. longibracteata
                                                     [Plantago princeps var. acaulis]
                                                     [Plantago princeps var. elata]
                                               Plantago princeps var. princeps
                                                     [Plantago princeps var. queleniana]
                                             Plantago psyllium
                                                   [Plantago arenaria]
                                                   [Plantago indica]
                                                   [Plantago scabra]
                                             Plantago pusilla
                                                   [Plantago hybrida]
                                                   [Plantago pusilla var. major]
                                             Plantago rhodosperma
                                             Plantago rugelii
                                                   [Plantago regelii]
                                               Plantago rugelii var. asperula
                                               Plantago rugelii var. rugelii
                                             Plantago sparsiflora
                                             Plantago subnuda
                                             Plantago tweedyi
                                                   [Plantago eriopoda var. tweedyi]
                                             Plantago virginica
                                                   [Plantago virginica var. viridescens]
                                             Plantago wrightiana
                                                   [Plantago hookeriana var. nuda]
                                     Pocilla
                                             Pocilla arvensis
                                             Pocilla biloba
                                             Pocilla persica
                                             Pocilla polita
                                     Pseudolysimachion
                                             Pseudolysimachion spurium
                                                   [Veronica spuria]
                                     Pseudorontium
                                             Pseudorontium cyathiferum
                                                   [Antirrhinum cyathiferum]
                                     Russelia
                                             Russelia alata
                                             Russelia equisetiformis
                                                   [Russelia juncea]
                                             Russelia racemosa
                                     Sairocarpus
                                             Sairocarpus breweri
                                                   [Antirrhinum breweri]
                                                   [Antirrhinum vexillocalyculatum ssp. breweri]
                                             Sairocarpus cornutus
                                                   [Antirrhinum cornutum var. leptaleum]
                                                   [Antirrhinum cornutum]
                                                   [Antirrhinum leptaleum]
                                             Sairocarpus coulterianus
                                                   [Antirrhinum coulterianum ssp. orcuttianum]
                                                   [Antirrhinum coulterianum]
                                             Sairocarpus elmeri
                                                   [Antirrhinum elmeri]
                                             Sairocarpus kingii
                                                   [Antirrhinum kingii]
                                             Sairocarpus multiflorus
                                                   [Antirrhinum multiflorum]
                                             Sairocarpus nuttallianus
                                                   [Antirrhinum nuttallianum ssp. nuttallianum]
                                                   [Antirrhinum nuttallianum]
                                             Sairocarpus pusillus
                                                   [Antirrhinum nuttallianum ssp. subsessile]
                                                   [Antirrhinum subsessile]
                                             Sairocarpus subcordatus
                                                   [Antirrhinum subcordatum]
                                             Sairocarpus vexillocalyculatus
                                                   [Antirrhinum vexillo-calyculatum ssp. vexillo-calyculatum]
                                                   [Antirrhinum vexillocalyculatum ssp. intermedium]
                                                   [Antirrhinum vexillocalyculatum]
                                             Sairocarpus virga
                                                   [Antirrhinum virga]
                                             Sairocarpus watsonii
                                                   [Antirrhinum kingii var. watsonii]
                                                   [Antirrhinum watsonii]
                                     Schistophragma
                                             Schistophragma intermedium
                                                   [Schistophragma intermedia]
                                     Scoparia
                                             Scoparia dulcis
                                             Scoparia flava
                                             Scoparia montevidensis
                                               Scoparia montevidensis var. glandulifera
                                     Sophronanthe
                                     Stemodia
                                           [Lendneria]
                                             Stemodia durantifolia
                                                   [Capraria durantifolia]
                                                   [Stemodia arizonica]
                                             Stemodia lanata
                                                   [Stemodia tomentosa]
                                             Stemodia maritima
                                             Stemodia schottii
                                             Stemodia verticillata
                                                   [Erinus verticillatus]
                                                   [Lendneria verticillata]
                                                   [Lindernia verticillata]
                                     Synthyris
                                           [Besseya]
                                             Synthyris alpina
                                                   [Besseya alpina]
                                             Synthyris borealis
                                             Synthyris bullii
                                                   [Besseya bullii]
                                                   [Wulfenia bullii]
                                             Synthyris canbyi
                                             Synthyris cordata
                                                   [Synthyris reniformis var. cordata]
                                             Synthyris dissecta
                                                   [Synthyris cymopteroides]
                                                   [Synthyris hendersonii]
                                                   [Synthyris pinnatifida var. canescens]
                                             Synthyris laciniata
                                                   [Synthyris laciniata ssp. ibapahensis]
                                                   [Synthyris laciniata ssp. laciniata]
                                                   [Synthyris pinnatifida var. laciniata]
                                             Synthyris lanuginosa
                                                   [Synthyris pinnatifida var. lanuginosa]
                                             Synthyris missurica
                                               Synthyris missurica ssp. major
                                                     [Synthyris missurica var. major]
                                                     [Synthyris reniformis var. major]
                                               Synthyris missurica ssp. missurica
                                                     [Synthyris missurica ssp. hirsuta]
                                               Synthyris missurica ssp. stellata
                                                     [Synthyris stellata]
                                             Synthyris oblongifolia
                                                   [Besseya oblongifolia]
                                             Synthyris pinnatifida
                                                   [Synthyris paysonii]
                                                   [Synthyris pinnatifida var. pinnatifida]
                                             Synthyris plantaginea
                                                   [Besseya arizonica]
                                                   [Besseya plantaginea]
                                             Synthyris platycarpa
                                             Synthyris ranunculina
                                             Synthyris reniformis
                                                   [Synthyris reniformis var. reniformis]
                                             Synthyris ritteriana
                                                   [Besseya ritteriana]
                                             Synthyris rubra
                                                   [Besseya rubra]
                                             Synthyris schizantha
                                             Synthyris stellata
                                             Synthyris wyomingensis
                                                   [Besseya cinerea]
                                                   [Besseya wyomingensis]
                                     Tonella
                                             Tonella floribunda
                                             Tonella tenella
                                     Tragiola
                                     Veronica
                                             Veronica X lackschewitzii
                                             Veronica agrestis
                                                   [Pocilla agrestis]
                                             Veronica alpina
                                                   [Veronica alpina ssp. australis]
                                                   [Veronica alpina var. alpina]
                                                   [Veronica alpina var. australis]
                                             Veronica americana
                                             Veronica anagallis-aquatica
                                                   [Veronica comosa]
                                                   [Veronica glandifera]
                                                   [Veronica micromera]
                                                   [Veronica micromeria]
                                                   [Veronica salina]
                                             Veronica arguteserrata
                                             Veronica arvensis
                                             Veronica austriaca
                                               Veronica austriaca ssp. vahlii
                                             Veronica barrelieri
                                             Veronica beccabunga
                                             Veronica biloba
                                                   [Pocilla biloba]
                                             Veronica campylopoda
                                             Veronica catenata
                                                   [Veronica catenata var. glandulosa]
                                                   [Veronica comosa var. glaberrima]
                                                   [Veronica comosa var. glandulosa]
                                                   [Veronica connata ssp. glaberrima]
                                                   [Veronica connata var. glaberrima]
                                                   [Veronica connata var. typica]
                                                   [Veronica connata]
                                             Veronica chamaedrys
                                             Veronica copelandii
                                             Veronica cusickii
                                             Veronica cymbalaria
                                                   [Veronica glandulifera]
                                             Veronica decussata
                                             Veronica dillenii
                                             Veronica filiformis
                                             Veronica franciscana
                                             Veronica fruticans
                                             Veronica gentianoides
                                             Veronica grandiflora
                                             Veronica grandis
                                                   [Veronica bachofenii]
                                             Veronica hederifolia
                                             Veronica incana
                                                   [Veronica spicata ssp. incana]
                                             Veronica longifolia
                                                   [Pseudolysimachion longifolium]
                                             Veronica nutans
                                             Veronica officinalis
                                               Veronica officinalis var. officinalis
                                                     [Veronica officinalis var. tournefortii]
                                                     [Veronica tournefortii]
                                             Veronica opaca
                                             Veronica peregrina
                                                   [Veronica peregrina ssp. peregrina]
                                                   [Veronica peregrina ssp. xalapensis]
                                                   [Veronica peregrina var. typica]
                                                   [Veronica peregrina var. xalapensis]
                                                   [Veronica sherwoodii]
                                                   [Veronica xalapensis]
                                               Veronica peregrina ssp. xalapensis
                                             Veronica persica
                                                   [Pocilla persica]
                                                   [Veronica persica var. aschersoniana]
                                                   [Veronica persica var. corrensiana]
                                                   [Veronica persica var. persica]
                                             Veronica plebeia
                                                   [Veronica plebia]
                                             Veronica polita
                                                   [Pocilla polita]
                                                   [Veronica didyma]
                                             Veronica prostrata
                                             Veronica scutellata
                                                   [Veronica scutellata var. villosa]
                                             Veronica serpyllifolia
                                                   [Veronica humifusa]
                                                   [Veronica serpyllifolia ssp. humifusa]
                                                   [Veronica serpyllifolia ssp. serpyllifolia]
                                                   [Veronica serpyllifolia var. borealis]
                                                   [Veronica serpyllifolia var. humifusa]
                                                   [Veronica serpyllifolia var. nummularioides]
                                                   [Veronica tenella]
                                                   [Veronicastrum serpyllifolium ssp. humifusum]
                                                   [Veronicastrum serpyllifolium]
                                             Veronica speciosa
                                             Veronica spicata
                                                   [Pseudolysimachion spicatum]
                                                   [Veronica spicata ssp. spicata]
                                             Veronica spuria
                                             Veronica stelleri
                                                   [Veronica stelleri var. glabrescens]
                                                   [Veronica wormskjoldii var. stelleri]
                                             Veronica sublobata
                                             Veronica teucrium
                                                   [Veronica austriaca ssp. teucrium]
                                                   [Veronica crinita]
                                                   [Veronica latifolia]
                                             Veronica tournefortii
                                             Veronica triloba
                                             Veronica triphyllos
                                             Veronica undulata
                                             Veronica verna
                                             Veronica wormskjoldii
                                               Veronica wormskjoldii ssp. nutans
                                                     [Veronica alpina var. alterniflora]
                                                     [Veronica alpina var. cascadensis]
                                                     [Veronica alpina var. geminiflora]
                                                     [Veronica alpina var. nutans]
                                                     [Veronica alpina var. unalaschcensis]
                                                     [Veronica nutans]
                                                     [Veronica wormskjoldii ssp. alterniflora]
                                               Veronica wormskjoldii ssp. wormskjoldii
                                                     [Veronica alpina var. terrae-novae]
                                                     [Veronica wormskjoldii var. wormskjoldii]
                                     Veronicastrum
                                               Veronicastrum serpyllifolium ssp. humifusum
                                             Veronicastrum virginicum
                                                   [Leptandra virginica]
                                                   [Veronica virginica]
                                     Wulfenia
                                             Wulfenia intermedia
                                             Wulfenia notoniana

Problematic Rooting (1291)
                                     Besseya
                                             Besseya alpina
                                             Besseya arizonica
                                             Besseya bullii
                                             Besseya cinerea
                                             Besseya oblongifolia
                                             Besseya plantaginea
                                             Besseya ritteriana
                                             Besseya rubra
                                             Besseya wyomingensis
                                     Chaenorrhinum
                                             Chaenorrhinum minus