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  Plantae

    Tracheobionta

      Pteridophyta

            Polypodiopsida

                    Polypodiales

                            Pteridaceae

                                     Adiantopsis

                                             Adiantopsis asplenioides

                                             Adiantopsis paupercula

                                                   [Cheilanthes paupercula]

                                             Adiantopsis pedata

                                             Adiantopsis radiata

                                             Adiantopsis rupicola

                                     Adiantum

                                             Adiantum X tracyi

                                             Adiantum aleuticum

                                                   [Adiantum pedatum ssp. aleuticum]

                                                   [Adiantum pedatum ssp. calderi]

                                                   [Adiantum pedatum ssp. subpumilum]

                                                   [Adiantum pedatum var. aleuticum]

                                                   [Adiantum pedatum var. subpumilum]

                                             Adiantum anceps

                                             Adiantum capillus-veneris

                                                   [Adiantum capillus-veneris var. modestum]

                                                   [Adiantum capillus-veneris var. protrusum]

                                                   [Adiantum modestum]

                                             Adiantum caudatum

                                             Adiantum concinnum

                                             Adiantum deltoideum

                                             Adiantum dolosum

                                             Adiantum fragile

                                               Adiantum fragile var. fragile

                                               Adiantum fragile var. rigidulum

                                                     [Adiantum rigidulum]

                                             Adiantum guianense

                                             Adiantum hexagona

                                             Adiantum hirsutum

                                             Adiantum hispidulum

                                             Adiantum jordanii

                                             Adiantum latifolium

                                             Adiantum lucidum

                                             Adiantum lunulatum

                                                   [Adiantum philippense]

                                             Adiantum macrophyllum

                                             Adiantum melanoleucum

                                             Adiantum obliquum

                                             Adiantum pedatum

                                             Adiantum petiolatum

                                             Adiantum pulverulentum

                                             Adiantum pyramidale

                                                   [Adiantum cristatum]

                                             Adiantum raddianum

                                                   [Adiantum cuneatum]

                                             Adiantum rigidulum

                                             Adiantum tenerum

                                             Adiantum tetraphyllum

                                             Adiantum trapeziforme

                                             Adiantum tricholepis

                                             Adiantum villosum

                                             Adiantum viridimontanum

                                             Adiantum vivesii

                                             Adiantum wilsonii

                                     Aleuritopteris

                                             Aleuritopteris cretacea

                                     Allosorus

                                             Allosorus ciliatus

                                     Anetium

                                             Anetium citrifolium

                                                   [Acrostichum citrifolium]

                                     Antrophyum

                                           [Polytaenium]

                                             Antrophyum cajenense

                                                   [Polytaenium cajenense]

                                             Antrophyum intramarginale

                                                   [Polytaenium intramarginale]

                                                   [Vittaria intramarginalis]

                                             Antrophyum lanceolatum

                                                   [Polytaenium feei]

                                             Antrophyum lineatum

                                                   [Polytaenium lineatum]

                                             Antrophyum plantagineum

                                                   [Hemionitis plantaginea]

                                             Antrophyum urbanii

                                                   [Polytaenium urbanii]

                                     Argyrochosma

                                             Argyrochosma dealbata

                                                   [Cheilanthes dealbata]

                                                   [Notholaena dealbata]

                                                   [Pellaea dealbata]

                                             Argyrochosma fendleri

                                                   [Cheilanthes cancellata]

                                                   [Notholaena fendleri]

                                                   [Pellaea fendleri]

                                             Argyrochosma incana

                                                   [Notholaena incana]

                                             Argyrochosma jonesii

                                                   [Cheilanthes jonesii]

                                                   [Notholaena jonesii]

                                                   [Pellaea jonesii]

                                             Argyrochosma limitanea

                                               Argyrochosma limitanea ssp. limitanea

                                                     [Cheilanthes limitanea]

                                                     [Notholaena limitanea]

                                                     [Pellaea limitanea]

                                               Argyrochosma limitanea ssp. mexicana

                                                     [Cheilanthes limitanea var. mexicana]

                                                     [Notholaena limitanea ssp. mexicana]

                                                     [Notholaena limitanea var. mexicana]

                                                     [Pellaea limitanea var. mexicana]

                                             Argyrochosma microphylla

                                                   [Cheilanthes parvifolia]

                                                   [Notholaena parvifolia]

                                                   [Pellaea microphylla]

                                     Aspidotis

                                             Aspidotis californica

                                                   [Cheilanthes californica]

                                             Aspidotis carlotta-halliae

                                                   [Cheilanthes carlotta-halliae]

                                             Aspidotis densa

                                                   [Cheilanthes siliquosa]

                                                   [Cryptogramma densa]

                                                   [Onychium densum]

                                                   [Pellaea densa]

                                     Astrolepis

                                             Astrolepis cochisensis

                                               Astrolepis cochisensis ssp. arizonica

                                               Astrolepis cochisensis ssp. chihuahuaensis

                                               Astrolepis cochisensis ssp. cochisensis

                                                     [Cheilanthes cochisensis]

                                                     [Cheilanthes sinuata var. cochisensis]

                                                     [Notholaena cochisensis]

                                                     [Notholaena sinuata var. cochisensis]

                                             Astrolepis cochisensis ssp cochisensis

                                             Astrolepis integerrima

                                                   [Cheilanthes integerrima]

                                                   [Notholaena integerrima]

                                                   [Notholaena sinuata var. integerrima]

                                             Astrolepis sinuata

                                               Astrolepis sinuata ssp. mexicana

                                               Astrolepis sinuata ssp. sinuata

                                                     [Cheilanthes sinuata]

                                                     [Notholaena sinuata]

                                             Astrolepis windhamii

                                     Bommeria

                                             Bommeria hispida

                                                   [Gymnopteris hispida]

                                     Cassebeera

                                     Ceratopteris

                                             Ceratopteris pteridoides

                                             Ceratopteris richardii

                                                   [Ceratopteris deltoidea]

                                             Ceratopteris thalictroides

                                                   [Acrostichum thalictroides]

                                                   [Ceratopteris gaudichaudii]

                                                   [Ceratopteris siliquosa]

                                     Cheilanthes

                                             Cheilanthes X fibrillosa

                                             Cheilanthes X parishii

                                             Cheilanthes aemula

                                             Cheilanthes alabamensis

                                                   [Pellaea alabamensis]

                                             Cheilanthes angustifolia

                                             Cheilanthes apiacea

                                             Cheilanthes arizonica

                                             Cheilanthes bonariensis

                                                   [Notholaena aurea]

                                             Cheilanthes californica

                                             Cheilanthes candida

                                             Cheilanthes carlotta-halliae

                                             Cheilanthes chaerophylla

                                             Cheilanthes clevelandii

                                             Cheilanthes cochisensis

                                             Cheilanthes complanata

                                             Cheilanthes cooperae

                                             Cheilanthes covillei

                                             Cheilanthes crenulata

                                             Cheilanthes cuneata

                                             Cheilanthes decipiens

                                             Cheilanthes decomposita

                                             Cheilanthes decora

                                             Cheilanthes decurrens

                                             Cheilanthes deserti

                                             Cheilanthes eatonii

                                                   [Cheilanthes castanea]

                                             Cheilanthes fendleri

                                             Cheilanthes féei

                                             Cheilanthes glandulifera

                                             Cheilanthes gracillima

                                                   [Cheilanthes gracillima var. aberrans]

                                             Cheilanthes grayi

                                             Cheilanthes harrisii

                                             Cheilanthes hintoniorum

                                             Cheilanthes hirsuta

                                             Cheilanthes horridula

                                             Cheilanthes intertexta

                                             Cheilanthes kaulfussii

                                             Cheilanthes lanosa

                                                   [Cheilanthes vestita]

                                             Cheilanthes lendigera

                                             Cheilanthes lerstenii

                                             Cheilanthes leucopoda

                                             Cheilanthes limitanea

                                             Cheilanthes lindheimeri

                                             Cheilanthes marginata

                                             Cheilanthes microphylla

                                             Cheilanthes newberryi

                                                   [Notholaena newberryi]

                                             Cheilanthes notholaenoides

                                             Cheilanthes parryi

                                                   [Notholaena parryi]

                                             Cheilanthes paupercula

                                             Cheilanthes pellaeopsis

                                             Cheilanthes pringlei

                                             Cheilanthes purpusii

                                             Cheilanthes pyramidalis

                                             Cheilanthes rufescens

                                             Cheilanthes selinoides

                                             Cheilanthes siliquosa

                                             Cheilanthes sinuata

                                             Cheilanthes spiculata

                                             Cheilanthes takeuchii

                                             Cheilanthes tenuifolia

                                             Cheilanthes tomentosa

                                             Cheilanthes venusta

                                             Cheilanthes villosa

                                             Cheilanthes viridis

                                                   [Pellaea viridis]

                                             Cheilanthes viscida

                                             Cheilanthes viscosa

                                             Cheilanthes wootonii

                                             Cheilanthes wrightii

                                             Cheilanthes yavapensis

                                     Chrysochosma

                                     Coniogramme

                                             Coniogramme pilosa

                                     Cryptogramma

                                             Cryptogramma acrostichoides

                                                   [Cryptogramma crispa ssp. acrostichoides]

                                             Cryptogramma cascadensis

                                             Cryptogramma crispa

                                             Cryptogramma densa

                                             Cryptogramma sitchensis

                                                   [Cryptogramma crispa var. sitchensis]

                                             Cryptogramma stelleri

                                     Doryopteris

                                             Doryopteris angelica

                                             Doryopteris decipiens

                                                   [Cheilanthes decipiens]

                                                   [Doryopteris decora var. decipiens]

                                             Doryopteris decora

                                                   [Cheilanthes decora]

                                             Doryopteris pedata

                                             Doryopteris subdecipiens

                                             Doryopteris takeuchii

                                                   [Cheilanthes takeuchii]

                                     Eriosorus

                                             Eriosorus hispidulus

                                                   [Psilogramme hispidula]

                                                   [Psilogramme hispidulus]

                                                   [Psilogramme portoricensis]

                                     Gaga

                                             Gaga angustifolia

                                                   [Allosorus angustifolius var. minor]

                                                   [Allosorus angustifolius var. minus]

                                                   [Allosorus angustifolius]

                                                   [Cheilanthes angustifolia]

                                                   [Cheilanthes venusta var. aurata]

                                                   [Onychium angustifolium]

                                                   [Pellaea angustifolia]

                                             Gaga apiacea

                                                   [Cheilanthes apiacea]

                                             Gaga arizonica

                                                   [Cheilanthes arizonica]

                                                   [Cheilanthes pyramidalis ssp. arizonica]

                                                   [Cheilanthes pyramidalis var. arizonica]

                                             Gaga chaerophylla

                                                   [Allosorus chaerophyllus]

                                                   [Cheilanthes chaerophylla]

                                             Gaga complanata

                                                   [Cheilanthes complanata var. interrupta]

                                                   [Cheilanthes complanata]

                                             Gaga cuneata

                                                   [Cassebeera cuneata]

                                                   [Cheilanthes cuneata]

                                                   [Pellaea cuneata]

                                             Gaga decomposita

                                                   [Allosorus decompositus]

                                                   [Cheilanthes decomposita]

                                                   [Pellaea decomposita]

                                                   [Pellaea decompositus]

                                             Gaga decurrens

                                                   [Cheilanthes decurrens]

                                             Gaga germanotta

                                             Gaga harrisii

                                                   [Cheilanthes harrisii]

                                             Gaga hintoniorum

                                                   [Cheilanthes hintoniorum]

                                             Gaga hirsuta

                                                   [Cheilanthes crenulata]

                                                   [Cheilanthes hirsuta]

                                                   [Cheilanthes pyramidalis]

                                                   [Cheilanthes rufescens]

                                                   [Cheilanthes spiculata]

                                                   [Pellaea angustifolia var. elongata]

                                             Gaga kaulfussii

                                                   [Cheilanthes glandulifera]

                                                   [Cheilanthes kaulfussii]

                                                   [Cheilanthes viscosa]

                                             Gaga lerstenii

                                                   [Cheilanthes lerstenii]

                                             Gaga marginata

                                                   [Allosorus ciliatus var. minor]

                                                   [Cheilanthes marginata]

                                                   [Pellaea marginata]

                                             Gaga membranacea

                                                   [Cheilanthes selinoides]

                                                   [Pellaea membranacea]

                                             Gaga monstraparva

                                             Gaga pellaeopsis

                                                   [Cheilanthes pellaeopsis]

                                             Gaga purpusii

                                                   [Cheilanthes purpusii]

                                     Gymnopteris

                                     Hecistopteris

                                             Hecistopteris pumila

                                     Hemionitis

                                             Hemionitis palmata

                                     Notholaena

                                             Notholaena aliena

                                                   [Cheilanthes aliena]

                                             Notholaena aschenborniana

                                                   [Cheilanthes aschenborniana]

                                             Notholaena californica

                                               Notholaena californica ssp. californica

                                                     [Aleuritopteris cretacea ssp. nigrescens]

                                                     [Cheilanthes deserti]

                                                     [Notholaena californica ssp. nigrescens]

                                                     [Notholaena candida var. accessita]

                                               Notholaena californica ssp. leucophylla

                                             Notholaena candida

                                             Notholaena cochisensis

                                             Notholaena copelandii

                                                   [Cheilanthes candida var. copelandii]

                                                   [Notholaena candida var. copelandii]

                                             Notholaena grayi

                                               Notholaena grayi ssp. grayi

                                                     [Cheilanthes grayi]

                                               Notholaena grayi ssp. sonorensis

                                             Notholaena greggii

                                                   [Cheilanthes greggii]

                                             Notholaena lemmonii

                                                   [Cheilanthes lemmonii]

                                             Notholaena limitanea

                                             Notholaena nealleyi

                                                   [Cheilanthes nealleyi]

                                                   [Notholaena schaffneri var. nealleyi]

                                             Notholaena neglecta

                                                   [Cheilanthes neglecta]

                                             Notholaena schaffneri

                                                   [Notholaena nealleyi var. mexicana]

                                                   [Notholaena schaffneri var. mexicana]

                                             Notholaena sinuata

                                             Notholaena standleyi

                                                   [Cheilanthes hookeri]

                                                   [Cheilanthes standleyi]

                                             Notholaena sulphurea

                                                   [Cheilanthes sulphurea]

                                                   [Chrysochosma sulphurea]

                                                   [Notholaena cretacea]

                                                   [Pteris sulphurea]

                                             Notholaena trichomanoides

                                                   [Cheilanthes trichomanoides]

                                     Onychium

                                     Pellaea

                                             Pellaea X glaciogena

                                             Pellaea andromedifolia

                                                   [Pellaea andromedifolia var. pubescens]

                                                   [Pellaea andromedifolia var. rubens]

                                             Pellaea angustifolia

                                             Pellaea atropurpurea

                                               Pellaea atropurpurea var. bushii

                                             Pellaea brachyptera

                                             Pellaea breweri

                                             Pellaea bridgesii

                                             Pellaea compacta

                                             Pellaea cordifolia

                                                   [Pellaea cardiomorpha]

                                                   [Pellaea cordata]

                                                   [Pellaea sagittata var. cordata]

                                             Pellaea cuneata

                                             Pellaea decomposita

                                             Pellaea decompositus

                                             Pellaea densa

                                             Pellaea gastonyi

                                             Pellaea glabella

                                               Pellaea glabella ssp. glabella

                                                     [Pellaea atropurpurea var. bushii]

                                               Pellaea glabella ssp. missouriensis

                                                     [Pellaea glabella var. missouriensis]

                                               Pellaea glabella ssp. occidentalis

                                                     [Pellaea glabella var. nana]

                                                     [Pellaea glabella var. occidentalis]

                                                     [Pellaea occidentalis]

                                             Pellaea glabella ssp occidentalis (E. Nelson) Windha

                                               Pellaea glabella ssp. simplex

                                                     [Pellaea atropurpurea var. simplex]

                                                     [Pellaea glabella var. simplex]

                                                     [Pellaea occidentalis ssp. simplex]

                                                     [Pellaea suksdorfiana]

                                             Pellaea intermedia

                                             Pellaea limitanea

                                             Pellaea lyngholmii

                                             Pellaea marginata

                                             Pellaea membranacea

                                             Pellaea mucronata

                                                   [Pellaea macronata]

                                               Pellaea mucronata ssp. californica

                                                     [Pellaea compacta]

                                                     [Pellaea mucronata var. californica]

                                               Pellaea mucronata ssp. mucronata

                                                     [Pellaea mucronata var. mucronata]

                                             Pellaea occidentalis

                                             Pellaea ovata

                                             Pellaea sagittata

                                             Pellaea ternifolia

                                               Pellaea ternifolia ssp. arizonica

                                               Pellaea ternifolia ssp. ternifolia

                                             Pellaea truncata

                                             Pellaea villosa

                                                   [Pellaea ternifolia ssp. villosa]

                                             Pellaea wrightiana

                                                   [Pellaea ternifolia var. wrightiana]

                                     Pentagramma

                                             Pentagramma pallida

                                                   [Pityrogramma pallida]

                                                   [Pityrogramma triangularis var. pallida]

                                             Pentagramma triangularis

                                               Pentagramma triangularis ssp. maxonii

                                                     [Pityrogramma triangularis var. maxonii]

                                               Pentagramma triangularis ssp. rebmanii

                                               Pentagramma triangularis ssp. semipallida

                                                     [Pityrogramma semipallida]

                                                     [Pityrogramma triangularis var. semipallida]

                                                     [Pityrogramma triangularis var. viridis]

                                               Pentagramma triangularis ssp. triangularis

                                                     [Pityrogramma triangularis]

                                               Pentagramma triangularis ssp. viscosa

                                                     [Pityrogramma triangularis var. viscosa]

                                                     [Pityrogramma viscosa]

                                     Pityrogramma

                                             Pityrogramma X mackenneyi

                                             Pityrogramma austroamericana

                                             Pityrogramma calomelanos

                                               Pityrogramma calomelanos var. austroamericana

                                                     [Pityrogramma austroamericana]

                                                     [Pityrogramma calomelanos var. aureoflava]

                                               Pityrogramma calomelanos var. calomelanos

                                             Pityrogramma chrysophylla

                                               Pityrogramma chrysophylla var. gabrielae

                                               Pityrogramma chrysophylla var. subflexuosa

                                                     [Pityrogramma subflexuosa]

                                             Pityrogramma ebenea

                                                   [Pityrogramma tartarea]

                                             Pityrogramma semipallida

                                             Pityrogramma subflexuosa

                                             Pityrogramma sulphurea

                                             Pityrogramma triangularis

                                             Pityrogramma trifoliata

                                                   [Trismeria trifoliata]

                                             Pityrogramma viscosa

                                     Psilogramme

                                     Pteris

                                           [Anopteris]

                                             Pteris X delchampsii

                                             Pteris X hillebrandii

                                             Pteris altissima

                                             Pteris arborea

                                                   [Pteris crassipes]

                                             Pteris bahamensis

                                                   [Pteris longifolia var. bahamensis]

                                             Pteris biaurita

                                             Pteris cretica

                                               Pteris cretica var. albolineata

                                               Pteris cretica var. cretica

                                             Pteris deflexa

                                             Pteris denticulata

                                             Pteris ensiformis

                                                   [Pteris ensiformis var. victoriae]

                                             Pteris excelsa

                                             Pteris grandifolia

                                             Pteris hexagona

                                                   [Adiantum hexagona]

                                                   [Anopteris heterophylla]

                                                   [Anopteris hexagona ssp. hexagona]

                                                   [Anopteris hexagona ssp. intermedia]

                                                   [Anopteris hexagona]

                                                   [Onychium strictum]

                                                   [Pteris heterophylla]

                                             Pteris irregularis

                                             Pteris longifolia

                                             Pteris lydgatei

                                                   [Pteris lidgatei]

                                                   [Pteris lidgatii]

                                                   [Schizostege lydgatei]

                                             Pteris multifida

                                                   [Pteris serrulata]

                                             Pteris mutilata

                                             Pteris plumula

                                                   [Pteris quadriaurita]

                                             Pteris pungens

                                             Pteris spinescens

                                             Pteris tremula

                                             Pteris tripartita

                                             Pteris vittata

                                     Schizostege

                                     Trismeria

                                     Vittaria

                                           [Ananthacorus]

                                             Vittaria appalachiana

                                             Vittaria costata

                                                   [Ananthacorus angustifolius]

                                             Vittaria elongata

                                                   [Vittaria rigida]

                                             Vittaria graminifolia

                                                   [Vittaria filifolia]

                                             Vittaria lineata

                                             Vittaria remota