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  Plantae
    Tracheobionta
      Pteridophyta
            Polypodiopsida
                    Polypodiales
                            Dryopteridaceae
                                     Arachniodes
                                           [Polystichopsis]
                                             Arachniodes aspidioides
                                             Arachniodes carvifolia
                                                   [Rumohra carvifolia]
                                             Arachniodes chaerophylloides
                                                   [Dryopteris chaerophylloides]
                                                   [Polystichopsis chaerophylloides]
                                             Arachniodes insularis
                                             Arachniodes simplicior
                                     Athyrium
                                             Athyrium alpestre
                                                   [Athyrium distentifolium]
                                               Athyrium alpestre subsp. americanum
                                               Athyrium alpestre var. americanum
                                                     [Athyrium alpestre ssp. americanum]
                                                     [Athyrium alpestre var. gaspense]
                                                     [Athyrium americanum]
                                                     [Athyrium distentifolium ssp. americanum]
                                                     [Athyrium distentifolium var. americanum]
                                               Athyrium distentifolium ssp. americanum
                                             Athyrium esculentum
                                             Athyrium fenzlianum
                                             Athyrium filix-femina
                                               Athyrium filix-femina ssp. cyclosorum
                                               Athyrium filix-femina var. angustum
                                                     [Athyrium angustum var. angustum]
                                                     [Athyrium angustum var. rubellum]
                                                     [Athyrium angustum var. subtripinnatum]
                                                     [Athyrium angustum]
                                                     [Athyrium filix-femina ssp. angustum]
                                                     [Athyrium filix-femina var. michauxii]
                                                     [Athyrium filix-femina var. rubellum]
                                               Athyrium filix-femina var. asplenioides
                                                     [Athyrium asplenioides]
                                                     [Athyrium filix-femina ssp. asplenioides]
                                               Athyrium filix-femina var. californicum
                                               Athyrium filix-femina var. cyclosorum
                                                     [Athyrium alpestre var. cyclosorum]
                                                     [Athyrium angustum var. boreale]
                                                     [Athyrium angustum var. borealis]
                                                     [Athyrium angustum var. elatius]
                                                     [Athyrium filix-femina ssp. cyclosorum]
                                                     [Athyrium filix-femina var. sitchense]
                                               Athyrium filix-femina ssp. angustum
                                             Athyrium japonicum
                                             Athyrium kaalaanum
                                             Athyrium macraei
                                             Athyrium mauianum
                                             Athyrium maximum
                                             Athyrium microphyllum
                                                   [Asplenium multisectum]
                                                   [Asplenium vexans]
                                                   [Athyrium baldwinii]
                                                   [Athyrium poiretianum]
                                             Athyrium niponicum
                                             Athyrium proliferum
                                             Athyrium pycnocarpon
                                             Athyrium sandwichianum
                                             Athyrium thelypterioides
                                     Bolbitis
                                             Bolbitis aliena
                                                   [Leptochilus alienus]
                                             Bolbitis fluviatilis
                                             Bolbitis heudelotii
                                             Bolbitis nicotianifolia
                                                   [Leptochilus nicotianifolius]
                                             Bolbitis pergamentacea
                                                   [Leptochilus pergamentaceus]
                                             Bolbitis portoricensis
                                                   [Bolbitis cladorrhizans]
                                                   [Leptochilus cladorrhizans]
                                             Bolbitis quoyana
                                             Bolbitis serratifolia
                                                   [Acrostichum serratifolium]
                                             Bolbitis sinuata
                                                   [Bolbitis hydrophylla]
                                     Cyathea
                                           [Cnemidaria]
                                           [Cyathea conquisita]
                                           [Cyathea flava]
                                           [Cyathea goudeyi]
                                           [Cyathea pendula]
                                           [Gymnosphaera]
                                           [Hemitelia]
                                           [Nephelea]
                                           [Schizocaena]
                                           [Sphaeropteris]
                                           [Trichipteris]
                                           [Trichopteris]
                                           [X Cyathidaria]
                                             Alsophila acantha
                                             Alsophila adspersa
                                             Alsophila aperta
                                             Alsophila arbuscula
                                                   [Trichipteris arbuscula]
                                             Alsophila baroumba
                                             Alsophila campestrium
                                             Alsophila chamaedendron
                                             Alsophila conantiana
                                             Alsophila confinis
                                             Alsophila damazioi
                                             Alsophila esmeraldensis
                                             Alsophila fallacina
                                             Alsophila flexuosa
                                             Alsophila furcinervia
                                             Alsophila gastonyi
                                             Alsophila glaucifolia
                                             Alsophila guinleorum
                                             Alsophila hirsutissima
                                                   [Alsophila hirsutissimaa]
                                             Alsophila hoehneana
                                             Alsophila lilianiae
                                             Alsophila loubetiana
                                             Alsophila matthewii
                                             Alsophila minervae
                                             Alsophila monosticha
                                             Alsophila mostellaria
                                             Alsophila pabstii
                                             Alsophila reitzii
                                             Alsophila roquettei
                                             Alsophila serrae
                                             Alsophila speciosa
                                             Cyathea X calolepis
                                             Cyathea X dryopteroides
                                                   [Alsophila amintae]
                                                   [Alsophila dryopteroides]
                                             Cyathea X irregularis
                                             Cyathea X marcescens
                                                   [Alsophila marcescens]
                                             Cyathea X moralesiana
                                             Cyathea X sessilifolia
                                                   [X Cyathidaria sessilifolia]
                                             Cyathea X smithiana
                                             Cyathea X wilsonii
                                                   [Hemitelia wilsonii]
                                                   [X Cyathidaria wilsonii]
                                             Cyathea abbottii
                                                   [Alsophila abbottii]
                                             Cyathea abitaguensis
                                             Cyathea abreviata
                                             Cyathea acanthomelas
                                                   [Alsophila sternbergii var. acanthomelas]
                                             Cyathea acanthophora
                                                   [Alsophila acanthophora]
                                             Cyathea aciculosa
                                                   [Sphaeropteris aciculosa]
                                             Cyathea acrostichoides
                                                   [Alsophila acrostichoides]
                                             Cyathea acuminata
                                                   [Alsophila acuminata]
                                             Cyathea acutidens
                                             Cyathea acutula
                                               Cyathea acutula var. acutula
                                                     [Alsophila acutula]
                                               Cyathea acutula var. deltoidea
                                               Cyathea acutula var. rufescens
                                             Cyathea adenochlamys
                                             Cyathea aemula
                                             Cyathea aeneifolia
                                               Cyathea aeneifolia var. aeneifolia
                                                     [Sphaeropteris aeneifolia]
                                               Cyathea aeneifolia var. macrophylla
                                                     [Sphaeropteris aeneifolia var. macrophylla]
                                             Cyathea affinis
                                             Cyathea agatheti
                                                   [Sphaeropteris agatheti]
                                             Cyathea akawaiorum
                                             Cyathea alata
                                                   [Alsophila alata]
                                             Cyathea alatissima
                                                   [Cnemidaria alatissima]
                                             Cyathea albida
                                             Cyathea albidopaleata
                                                   [Trichipteris albidopaleata]
                                             Cyathea albidosquamata
                                                   [Sphaeropteris albidosquamata]
                                             Cyathea albifrons
                                                   [Sphaeropteris albifrons]
                                             Cyathea albomarginata
                                             Cyathea albosetacea
                                                   [Sphaeropteris albosetacea]
                                             Cyathea alderwereltii
                                                   [Alsophila alderwereltii]
                                             Cyathea alleniae
                                                   [Alsophila alleniae]
                                             Cyathea alpicola
                                                   [Alsophila alpina]
                                                   [Cyathea alpina]
                                             Cyathea alsophila
                                                   [Alsophila australis]
                                               Cyathea alsophila var. alsophila
                                               Cyathea alsophila var. villosa
                                             Cyathea alstonii
                                             Cyathea alta
                                                   [Alsophila alta]
                                             Cyathea alternans
                                                   [Schizocaena alternans]
                                                   [Sphaeropteris alternans]
                                             Cyathea alticola
                                                   [Alsophila alticola]
                                             Cyathea alutacea
                                                   [Cyathea phalerata var. alutacea]
                                             Cyathea amabilis
                                                   [Cnemidaria amabilis]
                                             Cyathea amboinensis
                                             Cyathea ameristoneura
                                             Cyathea andersonii
                                             Cyathea andicola
                                                   [Cnemidaria quitensis]
                                             Cyathea andina
                                                   [Cyathea circumdata]
                                                   [Cyathea circumdentata]
                                                   [Cyathea escuquensis]
                                                   [Hemitelia escuquensis]
                                             Cyathea andohahelensis
                                                   [Alsophila andohalelensis]
                                             Cyathea aneitensis
                                                   [Alsophila aneitensis]
                                                   [Cyathea laciniata]
                                             Cyathea angiensis
                                                   [Sphaeropteris angiensis]
                                             Cyathea angustipinna
                                                   [Sphaeropteris angustipinna]
                                             Cyathea annae
                                                   [Alsophila annae]
                                             Cyathea apiculata
                                                   [Alsophila apiculata]
                                             Cyathea apoensis
                                                   [Alsophila apoensis]
                                             Cyathea appendiculata
                                                   [Alsophila appendiculata]
                                             Cyathea approximata
                                                   [Alsophila approximata]
                                                   [Cyathea approximata var. sorisquamata]
                                               Cyathea approximata var. approximata
                                             Cyathea aramaganensis
                                                   [Sphaeropteris aramaganensis]
                                             Cyathea arborea
                                               Cyathea arborea var. arborea
                                               Cyathea arborea var. pusilla
                                               Cyathea arborea var. regnellii
                                               Cyathea arborea var. sternbergii
                                             Cyathea arbuscula
                                             Cyathea archboldii
                                                   [Alsophila archboldii var. horrida]
                                                   [Alsophila archboldii]
                                             Cyathea arfakensis
                                             Cyathea aristata
                                                   [Cnemidaria apiculata]
                                             Cyathea armata
                                             Cyathea arnecornelii
                                             Cyathea ars
                                             Cyathea arthropoda
                                                   [Schizocaena arthropoda]
                                                   [Sphaeropteris arthropoda]
                                             Cyathea ascendens
                                             Cyathea aspera
                                                   [Cyathea aspera var. aculeata]
                                                   [Cyathea aspera var. aspera]
                                                   [Trichipteris aspera]
                                             Cyathea asplenioides
                                                   [Hymenophyllopsis asplenioides]
                                             Cyathea assimilis
                                                   [Sphaeropteris assimilis]
                                             Cyathea assurgens
                                             Cyathea atahuallpa
                                                   [Cyathea atahualpa]
                                             Cyathea aterrima
                                                   [Alsophila lechria]
                                                   [Alsophila scopulina]
                                                   [Sphaeropteris aterrima]
                                             Cyathea atrispora
                                             Cyathea atrocastanea
                                             Cyathea atropurpurea
                                                   [Gymnosphaera atropurpurea]
                                             Cyathea atrospinosa
                                                   [Sphaeropteris atrospinosa]
                                             Cyathea atrovirens
                                                   [Alsophila atrovirens f. acuminata]
                                                   [Alsophila atrovirens var. acuminata]
                                                   [Alsophila atrovirens var. ciliato-palacea]
                                                   [Alsophila atrovirens var. elongata]
                                                   [Alsophila atrovirens var. furcativenia]
                                                   [Alsophila atrovirens var. major]
                                                   [Alsophila atrovirens var. minor]
                                                   [Alsophila atrovirens var. patula]
                                                   [Alsophila atrovirens var. rigida]
                                                   [Alsophila atrovirens var. squamulosa]
                                                   [Alsophila atrovirens var. subcordata]
                                                   [Alsophila atrovirens]
                                                   [Alsophila kleinii]
                                                   [Alsophila leptocladia]
                                                   [Alsophila miquelii]
                                                   [Alsophila proceroides]
                                                   [Alsophila radens]
                                                   [Alsophila verruculosa]
                                                   [Cyathea atrovirens var. minor]
                                             Cyathea atrox
                                               Cyathea atrox var. atrox
                                                     [Sphaeropteris atrox]
                                               Cyathea atrox var. inermis
                                             Cyathea auriculata
                                                   [Alsophila auriculata]
                                             Cyathea auriculifera
                                                   [Sphaeropteris auriculifera]
                                             Cyathea australis
                                               Cyathea australis ssp. australis
                                                     [Alsophila australis ssp. australis]
                                                     [Cyathea australis var. australis]
                                                     [Cyathea australis var. glauca]
                                               Cyathea australis ssp. norfolkensis
                                                     [Alsophila australis ssp. norfolkiensis]
                                             Cyathea austroamericana
                                             Cyathea austropallescens
                                             Cyathea axillaris
                                             Cyathea azuayensis
                                             Cyathea baileyana
                                                   [Alsophila baileyana]
                                             Cyathea balakrishnanii
                                             Cyathea balanocarpa
                                                   [Alsophila balanocarpa]
                                             Cyathea barotu
                                             Cyathea barringtonii
                                             Cyathea basilaris
                                             Cyathea basiliaris
                                             Cyathea basirotundata
                                             Cyathea batesii
                                             Cyathea batjanensis
                                                   [Alsophila batjanensis]
                                             Cyathea bella
                                                   [Cnemidaria bella]
                                             Cyathea bellisquamata
                                               Cyathea bellisquamata var. ambrensis
                                               Cyathea bellisquamata var. australis
                                               Cyathea bellisquamata var. basilobata
                                                     [Alsophila bellisquamata var. basilobata]
                                               Cyathea bellisquamata var. bellisquamata
                                                     [Alsophila bellisquamata]
                                             Cyathea bernardii
                                             Cyathea bicrenata
                                                   [Cyathea stipularis]
                                                   [Cyathea trichiata]
                                                   [Trichipteris scabriuscula]
                                             Cyathea biformis
                                                   [Alsophila biformis]
                                                   [Gymnosphaera biformis]
                                             Cyathea bilineata
                                             Cyathea binuangensis
                                                   [Sphaeropteris binuangensis]
                                             Cyathea bipinnata
                                             Cyathea bipinnatifida
                                                   [Cyathea pubens]
                                                   [Trichipteris pubescens]
                                                   [Trichopteris pubescens]
                                             Cyathea bisquamata
                                             Cyathea blechnoides
                                                   [Cyathea blechnoides var. parkeri]
                                             Cyathea boivinii
                                                   [Cyathea boivini]
                                               Cyathea boivinii var. andringitrensis
                                               Cyathea boivinii var. bevolo
                                               Cyathea boivinii var. boivinii
                                                     [Alsophila hyacinthei]
                                                     [Alsophila isaloensis]
                                                     [Cyathea boivini var. boivini]
                                                     [Cyathea boivini var. humblotii]
                                                     [Cyathea isaloensis]
                                               Cyathea boivinii var. hildebrandtii
                                                     [Alsophila hildebrandtii]
                                                     [Cyathea hildebrandtii]
                                               Cyathea boivinii var. parahildebrandtii
                                             Cyathea boiviniiformis
                                                   [Cyathea bullata]
                                               Cyathea boiviniiformis var. boiviniiformis
                                               Cyathea boiviniiformis var. lobata
                                                     [Cyathea bullata var. lobata]
                                               Cyathea boiviniiformis var. madagascarica
                                                     [Cyathea bullata var. madagascarica]
                                             Cyathea borbonica
                                             Cyathea borinquena
                                                   [Alsophila boringuena]
                                                   [Alsophila borinquena]
                                                   [Trichipteris borinquena]
                                                   [Trichopteris borinquena]
                                             Cyathea borneensis
                                                   [Alsophila borneensis]
                                             Cyathea boryana
                                             Cyathea brachyphylla
                                             Cyathea brackenridgei
                                                   [Sphaeropteris brackenridgei]
                                             Cyathea bradei
                                             Cyathea brevipinna
                                                   [Alsophila brevipinna]
                                                   [Cyathea brevipinnata]
                                             Cyathea brooksii
                                                   [Alsophila brooksii]
                                             Cyathea brownii
                                                   [Sphaeropteris excelsa]
                                               Cyathea brownii var. brownii
                                             Cyathea brucei
                                             Cyathea brunei
                                                   [Sphaeropteris brunei]
                                             Cyathea brunnescens
                                             Cyathea brunoniana
                                                   [Sphaeropteris brunoniana]
                                             Cyathea bryophila
                                                   [Alsophila bryophila]
                                             Cyathea buennemeijerii
                                                   [Alsophila buennemeijeri]
                                             Cyathea callosa
                                                   [Alsophila callosa]
                                             Cyathea camerooniana
                                               Cyathea camerooniana var. aethiopica
                                               Cyathea camerooniana var. camerooniana
                                               Cyathea camerooniana var. congi
                                               Cyathea camerooniana var. currorii
                                               Cyathea camerooniana var. occidentalis
                                               Cyathea camerooniana var. ugandensis
                                               Cyathea camerooniana var. zenkeri
                                                     [Cyathea batesii]
                                             Cyathea camerunensis
                                             Cyathea canaliculata
                                             Cyathea canelensis
                                             Cyathea capensis
                                               Cyathea capensis var. capensis
                                                     [Alsophila capensis ssp. capensis]
                                                     [Alsophila capensis]
                                               Cyathea capensis var. polypodioides
                                                     [Alsophila capensis var. polypodiodes]
                                             Cyathea capitata
                                                   [Schizocaena capitata]
                                                   [Sphaeropteris capitata]
                                             Cyathea caracasana
                                                   [Cyathea caracasana var. meridensis]
                                               Cyathea caracasana var. caracasana
                                               Cyathea caracasana var. chimborazensis
                                               Cyathea caracasana var. maxonii
                                             Cyathea carolihenrici
                                             Cyathea carrii
                                                   [Sphaeropteris carrii]
                                             Cyathea catacampta
                                             Cyathea catillifera
                                                   [Alsophila catillifera]
                                             Cyathea caudata
                                             Cyathea celebica
                                                   [Alsophila celebica]
                                                   [Sphaeropteris celebica]
                                             Cyathea cervantesiana
                                             Cyathea chinensis
                                             Cyathea chiricana
                                               Cyathea chiricana var. chiricana
                                                     [Cnemidaria chiricana]
                                               Cyathea chiricana var. contigua
                                                     [Cnemidaria chiricana var. contigua]
                                                     [Cnemidaria mutica var. chiricana]
                                                     [Cnemidaria mutica var. contigua]
                                             Cyathea chocoensis
                                                   [Cnemidaria chocoensis]
                                             Cyathea chontilla
                                             Cyathea choricarpa
                                                   [Cnemidaria choricarpa]
                                             Cyathea christii
                                                   [Alsophila hermannii]
                                             Cyathea cicatricosa
                                                   [Alsophila cicatricosa]
                                             Cyathea cincinnata
                                                   [Alsophila cincinnata]
                                             Cyathea cinerea
                                                   [Alsophila cinerea]
                                             Cyathea cnemidaria
                                                   [Cnemidaria tryoniana]
                                             Cyathea coactilis
                                                   [Alsophila coactilis]
                                             Cyathea cocleana
                                                   [Cnemidaria cocleana]
                                             Cyathea colensoi
                                                   [Alsophila colensoi]
                                             Cyathea compta
                                             Cyathea concava
                                                   [Alsophila ballardii]
                                                   [Cyathea ballardii]
                                                   [Cyathea boivini var. concava]
                                             Cyathea concinna
                                                   [Cyathea concinna var. jamaicensis]
                                                   [Nephelea concinna]
                                             Cyathea concordia
                                             Cyathea conferta
                                             Cyathea conformis
                                             Cyathea conjugata
                                             Cyathea consimilis
                                                   [Cnemidaria consimilis]
                                             Cyathea contaminans
                                                   [Cyathea contaminans var. contaminans]
                                                   [Sphaeropteris glauca]
                                             Cyathea cooperi
                                                   [Sphaeropteris cooperi]
                                             Cyathea corallifera
                                             Cyathea corcovadensis
                                                   [Alsophila corcovadensis]
                                                   [Alsophila elegans var. crenata]
                                                   [Alsophila elegans]
                                                   [Alsophila feeana]
                                             Cyathea coriacea
                                             Cyathea costalisora
                                                   [Alsophila costalisora]
                                             Cyathea costaricensis
                                             Cyathea costularis
                                                   [Alsophila rolandii]
                                             Cyathea costulisora
                                                   [Alsophila montana]
                                                   [Cyathea costulisara]
                                             Cyathea coursii
                                                   [Alsophila coursii]
                                             Cyathea crassa
                                                   [Alsophila jimeneziana]
                                                   [Cyathea phalerata var. crassa]
                                                   [Nephelea crassa]
                                             Cyathea crenata
                                             Cyathea crenulata
                                             Cyathea crinita
                                                   [Sphaeropteris crinita]
                                             Cyathea croftii
                                             Cyathea cruciata
                                                   [Cnemidaria cruciata]
                                             Cyathea ctenitoides
                                                   [Hymenophyllopsis ctenitoides]
                                             Cyathea cuatrecasasii
                                                   [Sphaeropteris cuatrecasasii]
                                             Cyathea cubensis
                                                   [Alsophila cubensis]
                                                   [Cyathea woodwardioides var. cubensis]
                                             Cyathea cucullifera
                                                   [Alsophila cucullifera]
                                             Cyathea cumingii
                                             Cyathea cunninghamii
                                                   [Alsophila cunninghamii]
                                             Cyathea curranii
                                                   [Alsophila curranii]
                                                   [Sphaeropteris curranii]
                                             Cyathea cuspidata
                                                   [Alsophila cuspidata]
                                                   [Cyathea hassleriana]
                                             Cyathea cyatheoides
                                                   [Cyathea multiflora var. hostmannii]
                                                   [Hemitelia hostmanii]
                                             Cyathea cyclodium
                                             Cyathea cyclopodium
                                             Cyathea cystolepis
                                               Cyathea cystolepis var. boreopallescens
                                               Cyathea cystolepis var. cystolepis
                                               Cyathea cystolepis var. leonis
                                             Cyathea darienensis
                                             Cyathea dealbata
                                             Cyathea deckenii
                                             Cyathea decomposita
                                             Cyathea decora
                                             Cyathea decorata
                                             Cyathea decrescens
                                               Cyathea decrescens var. cristata
                                               Cyathea decrescens var. decrescens
                                                     [Alsophila decrescens]
                                                     [Cyathea decrescens var. hirsutifolia]
                                               Cyathea decrescens var. manongarivensis
                                               Cyathea decrescens var. quadrata
                                                     [Alsophila pilosula]
                                                     [Alsophila quadrata]
                                                     [Alsophila zakamenensis]
                                                     [Cyathea pilosula]
                                                     [Cyathea quadrata var. quadrata]
                                                     [Cyathea quadrata]
                                                     [Cyathea zakamenensis]
                                             Cyathea decurrens
                                               Cyathea decurrens var. decurrens
                                               Cyathea decurrens var. vaupelii
                                                     [Alsophila decurrens var. vaupelii]
                                             Cyathea decurrentiloba
                                                   [Cnemidaria decurrens]
                                                   [Cyathea lucida]
                                             Cyathea dejecta
                                                   [Hymenophyllum dejectum]
                                             Cyathea delgadii
                                                   [Cyathea bahiensis]
                                                   [Cyathea copelandii]
                                                   [Cyathea denticulata]
                                                   [Cyathea feei]
                                                   [Cyathea hirtula var. multisorosa]
                                                   [Cyathea hirtula]
                                                   [Cyathea micromera]
                                                   [Cyathea schanschin var. brasiliensis]
                                                   [Cyathea schanschin var. fulva]
                                                   [Cyathea schanschin]
                                                   [Cyathea trindadensis]
                                             Cyathea deminuens
                                                   [Sphaeropteris parvifolia]
                                             Cyathea demissa
                                               Cyathea demissa var. demissa
                                               Cyathea demissa var. thysanolepis
                                             Cyathea dichromatolepis
                                                   [Alsophila guimaraensis]
                                                   [Alsophila mesocarpa]
                                                   [Alsophila pallida]
                                                   [Cyathea guimariensis]
                                             Cyathea dicksonioides
                                                   [Alsophila dicksonioides]
                                             Cyathea dielsii
                                             Cyathea dilatata
                                             Cyathea dimorpha
                                                   [Alsophila dimorpha]
                                             Cyathea dintelmannii
                                             Cyathea discophora
                                                   [Sphaeropteris discophora]
                                             Cyathea dissimilis
                                             Cyathea dissoluta
                                             Cyathea divergens
                                               Cyathea divergens var. divergens
                                                     [Cyathea petiolulata]
                                               Cyathea divergens var. tuerckheimii
                                             Cyathea doctersii
                                                   [Alsophila doctersii]
                                             Cyathea dombeyi
                                             Cyathea dregei
                                                   [Alsophila dregei]
                                                   [Cyathea dredgei]
                                                   [Cyathea dregei var. polyphlebia]
                                                   [Cyathea dregei var. segregata]
                                               Cyathea dregei var. burkei
                                               Cyathea dregei var. dregei
                                             Cyathea dudleyi
                                             Cyathea dyeri
                                             Cyathea eatoni
                                             Cyathea ebenina
                                             Cyathea ecuadorensis
                                             Cyathea edanoi
                                                   [Alsophila edanoi]
                                             Cyathea eggersii
                                             Cyathea elliottii
                                             Cyathea elliptica
                                                   [Sphaeropteris elliptica]
                                             Cyathea elmeri
                                                   [Sphaeropteris elmeri]
                                             Cyathea elongata
                                                   [Alsophila engelii]
                                             Cyathea emilei
                                               Cyathea emilei var. dauphinensis
                                               Cyathea emilei var. emilei
                                                     [Alsophila borbonica var. latifolia]
                                                     [Alsophila borbonica]
                                                     [Cyathea borbonica var. borbonica]
                                                     [Cyathea borbonica var. latifolia]
                                                     [Cyathea borbonica var. sevathiana]
                                                     [Cyathea borbonica]
                                                     [Cyathea canaliculata]
                                             Cyathea epaleata
                                             Cyathea erinacea
                                                   [Alsophila erinacea]
                                             Cyathea eriophora
                                                   [Alsophila eriophora]
                                             Cyathea estelae
                                                   [Trichipteris estelae]
                                             Cyathea everta
                                                   [Alsophila everta]
                                             Cyathea ewanii
                                                   [Cnemidaria ewanii]
                                             Cyathea excavata
                                                   [Alsophila excavata]
                                             Cyathea excelsa
                                                   [Alsophila celsa]
                                             Cyathea exilis
                                             Cyathea fadenii
                                             Cyathea falcata
                                             Cyathea feani
                                                   [Sphaeropteris feani]
                                             Cyathea felina
                                                   [Cyathea felinum]
                                                   [Sphaeropteris felina]
                                             Cyathea fenicis
                                                   [Alsophila fenicis]
                                             Cyathea ferruginea
                                                   [Alsophila ferruginea]
                                             Cyathea foersteri
                                                   [Alsophila foersteri]
                                             Cyathea frigida
                                             Cyathea frondosa
                                             Cyathea fugax
                                                   [Sphaeropteris fugax]
                                             Cyathea fulgens
                                                   [Alsophila fulgens]
                                             Cyathea fuliginosa
                                             Cyathea fulva
                                             Cyathea furfuracea
                                             Cyathea fusca
                                                   [Sphaeropteris fusca]
                                             Cyathea gardneri
                                             Cyathea gazellae
                                             Cyathea geluensis
                                                   [Alsophila geluensis]
                                             Cyathea gibbosa
                                             Cyathea gigantea
                                                   [Alsophila gigantea var. polynervata]
                                                   [Alsophila gigantea]
                                                   [Cyathea pectinata]
                                                   [Cyathea pseudogigantea]
                                                   [Cyathea tinganensis]
                                             Cyathea glaberrima
                                                   [Alsophila glaberrima]
                                             Cyathea glabra
                                             Cyathea glandulifera
                                                   [Cnemidaria glandulosa]
                                             Cyathea glauca
                                             Cyathea glaziovii
                                             Cyathea gleichenioides
                                                   [Alsophila gleichenioides]
                                             Cyathea godeffroyi
                                             Cyathea gracilis
                                             Cyathea grandifolia
                                               Cyathea grandifolia var. grandifolia
                                                     [Cnemidaria grandifolia var. grandifolia]
                                                     [Cnemidaria grandifolia var. obtusa]
                                                     [Cnemidaria grandifolia]
                                                     [Hemitelia grandifolia]
                                               Cyathea grandifolia var. munita
                                             Cyathea grangaudiana
                                             Cyathea grantii
                                             Cyathea grata
                                             Cyathea grayumii
                                             Cyathea gregaria
                                                   [Alsophila gregaria]
                                             Cyathea grevilleana
                                                   [Alsophila grevilleana]
                                                   [Cyathea elegans]
                                             Cyathea guentheriana
                                             Cyathea guianensis
                                             Cyathea hainanensis
                                                   [Sphaeropteris hainanensis]
                                             Cyathea halconensis
                                                   [Alsophila halconensis]
                                             Cyathea hallieri
                                             Cyathea halonata
                                             Cyathea hancockii
                                                   [Alsophila denticulata]
                                             Cyathea harrisii
                                             Cyathea haughtii
                                             Cyathea havilandii
                                                   [Alsophila havilandii]
                                             Cyathea hebes
                                             Cyathea heliophila
                                             Cyathea hemiepiphytica
                                             Cyathea henryi
                                                   [Alsophila henryi]
                                             Cyathea herzogii
                                             Cyathea heterochlamydea
                                                   [Alsophila heterochlamydea]
                                                   [Alsophila hooglandii]
                                                   [Hemitelia heterochlamydea]
                                             Cyathea hildebrandtii
                                             Cyathea hirsuta
                                             Cyathea hirta
                                             Cyathea hispida
                                             Cyathea hodgeana
                                             Cyathea holdrigeana
                                             Cyathea hombersleyi
                                             Cyathea hooglandii
                                             Cyathea hookeri
                                                   [Alsophila hookeri]
                                             Cyathea hornei
                                                   [Gymnosphaera hornei]
                                             Cyathea horrida
                                                   [Cnemidaria horrida]
                                                   [Hemitelia horrida]
                                             Cyathea horridula
                                                   [Alsophila horridula]
                                             Cyathea hortulanea
                                                   [Cyathea hortuleana]
                                             Cyathea hotteana
                                                   [Alsophila hotteana]
                                             Cyathea howeana
                                             Cyathea humbertiana
                                                   [Alsophila humbertiana]
                                             Cyathea humilis
                                                   [Alsophila stuhlmannii]
                                               Cyathea humilis var. humilis
                                               Cyathea humilis var. pycnophylla
                                             Cyathea hunsteiniana
                                                   [Alsophila brausei]
                                             Cyathea hymenodes
                                                   [Alsophila hymenodes]
                                             Cyathea hymenophylloides
                                                   [Hymenophyllopsis hymenophylloides]
                                             Cyathea imbricata
                                                   [Alsophila imbricata]
                                             Cyathea impar
                                             Cyathea impolita
                                               Cyathea impolita var. impolita
                                               Cyathea impolita var. michelii
                                             Cyathea imrayana
                                               Cyathea imrayana var. basilaris
                                                     [Alsophila imrayana var. basilaris]
                                                     [Cyathea basilaris]
                                               Cyathea imrayana var. imrayana
                                                     [Alsophila imrayana]
                                                     [Cyathea imrayana var. subnudata]
                                             Cyathea inaequalis
                                                   [Sphaeropteris inaequalis]
                                             Cyathea incana
                                                   [Alsophila incana]
                                                   [Cyathea canescens]
                                                   [Cyathea sprucei]
                                             Cyathea incisoserrata
                                                   [Alsophila incisoserrata]
                                             Cyathea incognita
                                                   [Hymenophyllopsis incognita]
                                             Cyathea inermis
                                             Cyathea inheringii
                                             Cyathea inquinans
                                                   [Alsophila inquinans]
                                             Cyathea insignis
                                             Cyathea insulana
                                                   [Alsophila insulana]
                                             Cyathea insularum
                                                   [Sphaeropteris insularum]
                                             Cyathea integra
                                                   [Cyathea integra var. integra]
                                                   [Sphaeropteris integra]
                                             Cyathea intermedia
                                                   [Sphaeropteris intermedia]
                                             Cyathea intramarginalis
                                             Cyathea isaloensis
                                             Cyathea ivohibensis
                                                   [Alsophila quadrata var. ivohibensis]
                                                   [Cyathea quadrata var. ivohibensis]
                                             Cyathea jacobsii
                                             Cyathea jamaicensis
                                             Cyathea javanica
                                                   [Alsophila javanica]
                                             Cyathea jivariensis
                                             Cyathea junghuhniana
                                             Cyathea kalbreyeri
                                             Cyathea kanehirae
                                             Cyathea karsteniana
                                                   [Cnemidaria karsteniana]
                                             Cyathea kermadecensis
                                                   [Alsophila kermadecensis]
                                             Cyathea khasyana
                                             Cyathea kirkii
                                                   [Alsophila kirkii]
                                             Cyathea klossii
                                                   [Alsophila klossi]
                                             Cyathea lamoureuxii
                                             Cyathea lamprocaulis
                                             Cyathea lasiosora
                                                   [Alsophila mapiriensis]
                                             Cyathea lastii
                                                   [Alsophila lastii]
                                             Cyathea latebrosa
                                                   [Alsophila latebrosa]
                                                   [Cyathea tsangii]
                                             Cyathea latevagans
                                             Cyathea lathamii
                                             Cyathea latipinnula
                                                   [Alsophila latipinnula]
                                             Cyathea lechleri
                                             Cyathea ledermannii
                                                   [Sphaeropteris ledermannii var. quadripinnata]
                                                   [Sphaeropteris ledermannii]
                                             Cyathea leichhardtiana
                                                   [Alsophila leichhardtiana]
                                                   [Cyathea leichhardtiana var. leichhardtiana]
                                             Cyathea lepidoclada
                                                   [Alsophila lepidoclada]
                                             Cyathea lepifera
                                                   [Sphaeropteris lepifera]
                                             Cyathea leprieurii
                                             Cyathea leptochlamys
                                                   [Alsophila leptochlamys]
                                             Cyathea leschenaultiana
                                             Cyathea leucofolis
                                             Cyathea leucolepis
                                                   [Sphaeropteris leucolepis]
                                             Cyathea leucolepismata
                                                   [Cyathea amazonica]
                                             Cyathea leucotricha
                                                   [Sphaeropteris leucotricha]
                                             Cyathea lewisii
                                             Cyathea liesneri
                                             Cyathea ligulata
                                                   [Alsophila ligulata]
                                             Cyathea lindeniana
                                             Cyathea lindigii
                                             Cyathea lindsayana
                                             Cyathea lisyae
                                                   [Cyathea lisiae]
                                             Cyathea lockwoodiana
                                             Cyathea loerzingii
                                                   [Alsophila loerzingii]
                                             Cyathea loheri
                                                   [Alsophila loheri]
                                             Cyathea longipes
                                                   [Alsophila longipes]
                                             Cyathea longipinnata
                                                   [Alsophila longipinnata]
                                             Cyathea longispina
                                             Cyathea lunulata
                                                   [Alsophila ponapeana]
                                                   [Alsophila veitchii]
                                                   [Alsophila vitiensis]
                                                   [Cyathea lunulata var. lunulata]
                                                   [Cyathea ponapeana]
                                                   [Sphaeropteris lunulata ssp. lunulata]
                                                   [Sphaeropteris lunulata ssp. vitiensis]
                                                   [Sphaeropteris lunulata]
                                             Cyathea lurida
                                                   [Alsophila lurida]
                                             Cyathea macarthurii
                                                   [Alsophila ferdinandii]
                                                   [Alsophila ferinandii]
                                             Cyathea macgillivrayi
                                                   [Alsophila macgillivraryi]
                                             Cyathea macgregorii
                                                   [Alsophila macgregorii]
                                             Cyathea macrocarpa
                                             Cyathea macrophylla
                                               Cyathea macrophylla var. macrophylla
                                               Cyathea macrophylla var. quadripinnata
                                             Cyathea macropoda
                                                   [Alsophila macropoda]
                                             Cyathea macrosora
                                                   [Cyathea macrosora var. macrosora]
                                             Cyathea madagascarica
                                                   [Alsophila matitanensis]
                                             Cyathea madagascariensis
                                                   [Cyathea borbonica var. madagascariensis]
                                             Cyathea magna
                                                   [Sphaeropteris magna]
                                             Cyathea magnifolia
                                                   [Alsophila magnifolia]
                                             Cyathea maguirei
                                             Cyathea manniana
                                                   [Alsophila manniana]
                                                   [Cyathea usambarensis]
                                             Cyathea mapahuwensis
                                             Cyathea marattioides
                                                   [Alsophila marattioides]
                                             Cyathea marginalis
                                             Cyathea marginata
                                                   [Sphaeropteris marginata]
                                             Cyathea marshalliana
                                             Cyathea masapilidensis
                                                   [Alsophila masapilidensis]
                                             Cyathea mastersiana
                                             Cyathea media
                                                   [Alsophila media]
                                             Cyathea medullaris
                                                   [Cyathea societarum]
                                                   [Sphaeropteris medullaris]
                                             Cyathea megalosora
                                                   [Sphaeropteris megalosora]
                                             Cyathea melanacantha
                                                   [Cyathea aeneifolia var. melancantha]
                                                   [Sphaeropteris aeneifolia var. melancantha]
                                             Cyathea melanocaula
                                             Cyathea melleri
                                                   [Alsophila melleri]
                                                   [Cyathea glandulosa]
                                                   [Cyathea melleri var. virescens]
                                               Cyathea melleri var. melleri
                                             Cyathea mello-baroetoi
                                             Cyathea meridensis
                                               Cyathea meridensis var. meridensis
                                               Cyathea meridensis var. nana
                                               Cyathea meridensis var. obtecta
                                             Cyathea meridionalis
                                             Cyathea mertensiana
                                                   [Sphaeropteris mertensiana]
                                             Cyathea mesosora
                                                   [Alsophila mesosora]
                                             Cyathea metteniana
                                                   [Alsophila metteniana]
                                             Cyathea mettenii
                                               Cyathea mettenii var. caucana
                                               Cyathea mettenii var. mettenii
                                             Cyathea mexiae
                                                   [Trichipteris mexiae]
                                             Cyathea mexicana
                                                   [Alsophila firma]
                                                   [Cyathea firma]
                                                   [Cyathea mexicana var. mexicana]
                                             Cyathea microchlamys
                                                   [Alsophila microchlamys]
                                             Cyathea microdonta
                                             Cyathea microlepidota
                                                   [Sphaeropteris microlepidota]
                                             Cyathea microphylla
                                             Cyathea microphylloides
                                                   [Alsophila microphylloides]
                                                   [Cyathea microphyllodes]
                                             Cyathea mildbraedii
                                                   [Alsophila mildbraedii]
                                             Cyathea milnei
                                                   [Alsophila milnei]
                                             Cyathea minor
                                                   [Alsophila minor]
                                                   [Alsophila tenuis]
                                                   [Cyathea tenuis]
                                             Cyathea minuta
                                             Cyathea miquelii
                                             Cyathea modesta
                                                   [Alsophila modesta]
                                             Cyathea moluccana
                                                   [Sphaeropteris moluccana]
                                             Cyathea monilifera
                                             Cyathea monticola
                                             Cyathea moranii
                                             Cyathea moseleyi
                                                   [Sphaeropteris moseleyi]
                                             Cyathea mossambicensis
                                                   [Alsophila mossambicensis]
                                             Cyathea mucilagina
                                             Cyathea muelleri
                                                   [Alsophila muelleri]
                                             Cyathea multiflora
                                                   [Cyathea alfonsiana]
                                                   [Cyathea alphonsiana]
                                                   [Cyathea multiflora var. multiflora]
                                             Cyathea multisegmenta
                                             Cyathea munita
                                             Cyathea muricata
                                                   [Hemitelia muricata]
                                             Cyathea murkelensis
                                             Cyathea mutica
                                               Cyathea mutica var. grandis
                                                     [Cnemidaria mutica var. grandis]
                                                     [Cnemidaria rudis]
                                               Cyathea mutica var. mutica
                                                     [Cnemidaria mutica var. mutica]
                                                     [Cnemidaria mutica]
                                             Cyathea myosuroides
                                                   [Alsophila myosuroides]
                                             Cyathea myriotricha
                                             Cyathea nanna
                                             Cyathea neblinae
                                             Cyathea negrosiana
                                                   [Alsophila negrosiana]
                                             Cyathea nephele
                                             Cyathea nervosa
                                                   [Cnemidaria nervosa]
                                             Cyathea nesiotica
                                                   [Trichipteris nesiotica]
                                             Cyathea nicklesii
                                                   [Alsophila nicklesii]
                                             Cyathea nicobarica
                                             Cyathea nigricans
                                                   [Sphaeropteris nigricans]
                                             Cyathea nigripes
                                               Cyathea nigripes var. nigripes
                                             Cyathea nigrolineata
                                                   [Alsophila nigrolineata]
                                             Cyathea nigropaleata
                                                   [Alsophila nigropaleata]
                                             Cyathea nilgirensis
                                                   [Alsophila nilgirensis]
                                             Cyathea nockii
                                                   [Alsophila nockii]
                                             Cyathea nodulifera
                                             Cyathea notabilis
                                                   [Alsophila notabilis]
                                             Cyathea nothofagorum
                                             Cyathea novae-caledoniae
                                                   [Sphaeropteris novae-caledoniae]
                                             Cyathea obliqua
                                                   [Gymnosphaera obliqua]
                                                   [Sphaeropteris obliqua]
                                             Cyathea obnoxia
                                             Cyathea obscura
                                                   [Sphaeropteris obscura]
                                             Cyathea obtecta
                                             Cyathea obtusa
                                             Cyathea obtusiloba
                                             Cyathea odonelliana
                                                   [Alsophila odonelliana]
                                             Cyathea ogurae
                                             Cyathea ohaensis
                                             Cyathea oinops
                                                   [Alsophila oinops]
                                             Cyathea onusta
                                             Cyathea oosora
                                                   [Alsophila oosora]
                                             Cyathea orientalis
                                                   [Alsophila orientalis]
                                             Cyathea orthogonalis
                                                   [Alsophila orthogonalis]
                                             Cyathea pachyrrhachis
                                                   [Alsophila pachyrrhachis]
                                             Cyathea pacifica
                                             Cyathea palaciosii
                                             Cyathea paladensis
                                             Cyathea pallescens
                                             Cyathea pallidipaleata
                                                   [Alsophila pallidipaleata]
                                             Cyathea pansamalana
                                             Cyathea papuana
                                                   [Gymnosphaera papuana]
                                                   [Sphaeropteris papuana]
                                             Cyathea parianensis
                                             Cyathea parksiae
                                                   [Cyathea parksii]
                                                   [Sphaeropteris parksiae]
                                             Cyathea parva
                                                   [Alsophila micra]
                                             Cyathea parvifolia
                                                   [Cyathea brevistipes]
                                             Cyathea parvipinna
                                                   [Sphaeropteris parvipinna]
                                             Cyathea parvula
                                                   [Alsophila aquilina]
                                                   [Alsophila aquillina]
                                                   [Cyathea aquilina]
                                               Cyathea parvula var. parvula
                                             Cyathea pastoensis
                                             Cyathea patellifera
                                                   [Alsophila patellifera]
                                             Cyathea patens
                                             Cyathea pauciflora
                                             Cyathea paucifolia
                                             Cyathea peladensis
                                             Cyathea percrassa
                                                   [Alsophila percrassa]
                                             Cyathea perpelvigera
                                                   [Alsophila perpelvigera]
                                             Cyathea perpunctulata
                                                   [Alsophila perpunctulata]
                                             Cyathea perrieriana
                                                   [Alsophila perrieriana]
                                             Cyathea persquamulifera
                                                   [Sphaeropteris persquamulifera]
                                             Cyathea pervilleana
                                                   [Alsophila borbonica var. pervilleana]
                                                   [Cyathea borbonica var. pervilleana]
                                                   [Cyathea borbonica var. pesvilleana]
                                             Cyathea petiolata
                                                   [Cyathea integra var. petiolata]
                                             Cyathea petiolulata
                                             Cyathea phalaenolepis
                                             Cyathea phalerata
                                                   [Alsophila contracta]
                                                   [Alsophila goyazensis]
                                                   [Alsophila paleolata]
                                                   [Alsophila paulistana]
                                                   [Cyathea iheringii]
                                                   [Cyathea phalerata var. iheringii]
                                                   [Cyathea phalerata var. l'heringii]
                                               Cyathea phalerata var. latiloba
                                               Cyathea phalerata var. phalerata
                                             Cyathea phegopteroides
                                                   [Trichipteris phegopteroides]
                                             Cyathea philippinensis
                                                   [Sphaeropteris philippinensis]
                                             Cyathea physolepidota
                                                   [Alsophila physolepidota]
                                             Cyathea pichinchae
                                             Cyathea pilosissima
                                             Cyathea pilosula
                                             Cyathea pilulifera
                                                   [Sphaeropteris pilulifera]
                                             Cyathea pinnula
                                             Cyathea plagiostegia
                                                   [Alsophila plagiostegia]
                                             Cyathea planadae
                                             Cyathea platylepis
                                             Cyathea plicata
                                             Cyathea podophylla
                                             Cyathea poeppigii
                                                   [Alsophila impressa]
                                                   [Alsophila plagiopteris]
                                                   [Cyathea anacampta]
                                             Cyathea polliculi
                                             Cyathea polycarpa
                                             Cyathea polypoda
                                                   [Sphaeropteris polypoda]
                                             Cyathea polystichoides
                                                   [Alsophila polystichoides]
                                             Cyathea poolii
                                                   [Alsophila poolii]
                                                   [Alsophila vestita]
                                             Cyathea portoana
                                             Cyathea portoricensis
                                                   [Alsophila portoricensis]
                                                   [Nephelea portoricensis]
                                             Cyathea povedae
                                             Cyathea praeceps
                                             Cyathea praecincta
                                             Cyathea praetermissa
                                             Cyathea princeps
                                                   [Sphaeropteris horrida]
                                             Cyathea procera
                                                   [Sphaeropteris procera]
                                             Cyathea propinqua
                                                   [Sphaeropteris propinqua]
                                             Cyathea pruinosa
                                                   [Alsophila pruinosa]
                                             Cyathea pseudobellisquamata
                                             Cyathea pseudomuelleri
                                                   [Alsophila pseudomuelleri]
                                             Cyathea pseudonanna
                                             Cyathea puberula
                                             Cyathea pubescens
                                                   [Alsophila auneae]
                                                   [Nephelea pubescens]
                                             Cyathea pukuana
                                             Cyathea pulcherrima
                                                   [Sphaeropteris pulcherrima]
                                             Cyathea punctata
                                             Cyathea punctulata
                                             Cyathea pungens
                                                   [Alsophila procera]
                                                   [Cyathea bulligera]
                                                   [Cyathea infesta]
                                                   [Cyathea oblonga]
                                                   [Trichipteris procera]
                                             Cyathea pycnoneura
                                                   [Alsophila pycnoneura]
                                             Cyathea pygmaea
                                             Cyathea quadrata
                                             Cyathea quindiuensis
                                                   [Cyathea yungensis]
                                                   [Sphaeropteris quindiuensis]
                                             Cyathea quitensis
                                             Cyathea raciborskii
                                             Cyathea raiateensis
                                             Cyathea ramisora
                                             Cyathea ramispina
                                                   [Gymnosphaera ramispina]
                                             Cyathea ramispinoides
                                             Cyathea rapaensis
                                             Cyathea rebeccae
                                                   [Alsophila rebeccae]
                                             Cyathea recommutata
                                                   [Gymnosphaera recommutata]
                                             Cyathea recurvata
                                             Cyathea reginae
                                                   [Cyathea macrosora var. reginae]
                                             Cyathea remotifolia
                                                   [Alsophila borbonica var. laevigata]
                                                   [Cyathea borbonica var. laevigata]
                                             Cyathea retanae
                                             Cyathea revoluta
                                             Cyathea rigens
                                                   [Alsophila rigens]
                                             Cyathea robertsiana
                                                   [Alsophila robertsiana]
                                             Cyathea robinsonii
                                                   [Sphaeropteris robinsonii]
                                             Cyathea robusta
                                                   [Alsophila robusta var. norfolkiana]
                                                   [Sphaeropteris robusta var. norfolkiana]
                                                   [Sphaeropteris robusta]
                                             Cyathea rojasiana
                                                   [Cyathea panamensis]
                                             Cyathea roraimensis
                                                   [Cnemidaria roraimensis]
                                             Cyathea roroka
                                             Cyathea rosenstockii
                                                   [Alsophila rosenstockii]
                                                   [Sphaeropteris rosenstockii]
                                             Cyathea rouhaniana
                                             Cyathea rubella
                                                   [Alsophila rubella]
                                             Cyathea rubiginosa
                                                   [Alsophila rubiginosa]
                                             Cyathea rufa
                                             Cyathea rufescens
                                                   [Sphaeropteris rufescens]
                                             Cyathea rufopannosa
                                                   [Alsophila rufopannosa]
                                             Cyathea ruiziana
                                                   [Cyathea boliviana]
                                             Cyathea rumphii
                                             Cyathea runensis
                                                   [Sphaeropteris runensis]
                                             Cyathea rupestris
                                                   [Alsophila rupestris]
                                             Cyathea saccata
                                                   [Alsophila saccata]
                                             Cyathea sagittifolia
                                             Cyathea salletii
                                                   [Alsophila salletii]
                                             Cyathea salvinii
                                                   [Alsophila salvinii]
                                             Cyathea samoensis
                                             Cyathea sangirensis
                                             Cyathea sarasinorum
                                                   [Sphaeropteris sarasinorum]
                                             Cyathea scabra
                                             Cyathea scabriuscula
                                             Cyathea scandens
                                                   [Alsophila scandens]
                                             Cyathea schenckii
                                             Cyathea schiedeana
                                             Cyathea schlechteri
                                                   [Gymnosphaera schlechteri]
                                             Cyathea schliebenii
                                                   [Alsophila tanzaniana]
                                             Cyathea schlimii
                                             Cyathea sechellarum
                                                   [Alsophila sechellarum]
                                             Cyathea semiamplectens
                                                   [Alsophila semiamplectens]
                                             Cyathea senex
                                                   [Sphaeropteris senex]
                                             Cyathea senilis
                                             Cyathea serpens
                                             Cyathea serratifolia
                                                   [Alsophila serratifolia]
                                             Cyathea sessifolia
                                             Cyathea setchellii
                                             Cyathea setifera
                                                   [Sphaeropteris setifera]
                                             Cyathea setosa
                                                   [Alsophila setosa]
                                             Cyathea setulosa
                                                   [Alsophila setulosa]
                                             Cyathea sibuyanensis
                                                   [Sphaeropteris sibuyanensis]
                                             Cyathea similis
                                               Cyathea similis var. leptoderma
                                               Cyathea similis var. montana
                                               Cyathea similis var. similis
                                                     [Alsophila albida]
                                                     [Alsophila similis]
                                                     [Cyathea albida]
                                             Cyathea simplex
                                             Cyathea simulans
                                                   [Alsophila borbonica var. simulans]
                                                   [Cyathea borbonica var. simulans]
                                             Cyathea singularis
                                                   [Cnemidaria singularis]
                                             Cyathea sinops
                                             Cyathea sinuata
                                                   [Alsophila sinuata]
                                             Cyathea sipapoensis
                                             Cyathea sledgei
                                             Cyathea smithii
                                                   [Alsophila smithii]
                                             Cyathea solomonensis
                                                   [Alsophila solomonensis]
                                             Cyathea speciosa
                                                   [Cnemidaria lindenii]
                                             Cyathea spectabilis
                                               Cyathea spectabilis var. colombiensis
                                                     [Cnemidaria spectabilis var. colombiensis]
                                               Cyathea spectabilis var. spectabilis
                                                     [Cnemidaria spectabilis var. spectabilis]
                                                     [Cnemidaria spectabilis]
                                             Cyathea spinulosa
                                                   [Alsophila decipiens]
                                             Cyathea squamata
                                             Cyathea squamipes
                                                   [Cyathea caracasana var. boliviensis]
                                             Cyathea squamulata
                                                   [Sphaeropteris squamulata]
                                             Cyathea squamulosa
                                             Cyathea squarrosa
                                             Cyathea srilankensis
                                             Cyathea stelligera
                                                   [Alsophila stelligera]
                                             Cyathea sternbergii
                                                   [Alsophila sternbergii]
                                                   [Cyathea rojasii]
                                             Cyathea steyermarkii
                                             Cyathea stipitipinnula
                                                   [Sphaeropteris stipitipinnula]
                                             Cyathea stokesii
                                                   [Alsophila stokesii]
                                             Cyathea stolzeana
                                                   [Cnemidaria stolzeana]
                                             Cyathea stolzei
                                             Cyathea straminea
                                             Cyathea strigillosa
                                             Cyathea strigosa
                                                   [Sphaeropteris strigosa]
                                             Cyathea stubelii
                                                   [Alsophila paucifolia]
                                             Cyathea subarborescens
                                             Cyathea subdubia
                                                   [Alsophila subdubia]
                                             Cyathea subincisa
                                                   [Cnemidaria speciosa]
                                             Cyathea subindusiata
                                               Cyathea subindusiata var. chontilla
                                                     [Cyathea subindustiata var. chontilla]
                                               Cyathea subindusiata var. subindusiata
                                             Cyathea subindustiata
                                             Cyathea submarginalis
                                             Cyathea subsessilis
                                                   [Sphaeropteris subsessilis]
                                             Cyathea subtripinnata
                                                   [Alsophila subtripinnata]
                                             Cyathea subulata
                                             Cyathea suluensis
                                                   [Sphaeropteris suluensis]
                                             Cyathea sumatrana
                                                   [Alsophila sumatrana]
                                             Cyathea suprapilosa
                                                   [Cnemidaria suprastrigosa]
                                             Cyathea suprastrigosa
                                             Cyathea surinamensis
                                                   [Alsophila pilgera]
                                                   [Alsophila piligera]
                                                   [Cyathea superba]
                                             Cyathea sylvatica
                                             Cyathea tahitensis
                                             Cyathea taiwanense
                                             Cyathea tenera
                                                   [Cyathea brittoniana]
                                             Cyathea tenggerensis
                                                   [Sphaeropteris tenggerensis]
                                             Cyathea tenuicaulis
                                             Cyathea tepuiana
                                                   [Hymenophyllopsis steyermarkii]
                                             Cyathea ternatea
                                                   [Alsophila ternatea]
                                             Cyathea teysmannii
                                                   [Sphaeropteris teysmannii]
                                             Cyathea thelypteroides
                                             Cyathea thomsonii
                                                   [Alsophila thomsonii]
                                             Cyathea thwaitesii
                                             Cyathea thysanolepis
                                             Cyathea tomentosa
                                                   [Sphaeropteris tomentosa]
                                             Cyathea tomentosissima
                                                   [Sphaeropteris tomentosissima]
                                             Cyathea tortuosa
                                             Cyathea trachypoda
                                             Cyathea traillii
                                             Cyathea trichodesma
                                                   [Sphaeropteris trichodesma]
                                             Cyathea trichomanoides
                                                   [Hymenophyllopsis superba]
                                             Cyathea trichophora
                                                   [Cyathea contaminans var. trichophora]
                                                   [Cyathea trichophara]
                                                   [Sphaeropteris trichophora]
                                             Cyathea trinitensis
                                             Cyathea tripinnata
                                                   [Sphaeropteris tripinnata]
                                             Cyathea tripinnatifida
                                                   [Sphaeropteris tripinnatifida]
                                             Cyathea truncata
                                                   [Cyathea truncata var. nivea]
                                                   [Cyathea truncata var. truncata]
                                                   [Sphaeropteris truncata]
                                             Cyathea tryoniana
                                                   [Alsophila tryoniana]
                                             Cyathea tryonorum
                                             Cyathea tsaratananensis
                                                   [Alsophila tsaratananensis]
                                             Cyathea tsilotsilensis
                                                   [Alsophila tsilotsilensis]
                                             Cyathea tungurahuae
                                             Cyathea tussacii
                                                   [Alsophila tussacii]
                                             Cyathea tuyamae
                                             Cyathea uleana
                                               Cyathea uleana var. abitaguensis
                                                     [Cnemidaria uleana var. abitaguensis]
                                                     [Cyathea abitaguensis]
                                               Cyathea uleana var. uleana
                                                     [Cnemidaria uleana var. uleana]
                                                     [Cnemidaria uleana]
                                                     [Cyathea subarborescens]
                                             Cyathea ulei
                                                   [Cyathea subtropica]
                                             Cyathea universitatis
                                                   [Hymenophyllopsis universitatis]
                                             Cyathea urbanii
                                                   [Alsophila urbanii]
                                             Cyathea ursina
                                             Cyathea valdecrenata
                                             Cyathea valdesquamata
                                             Cyathea van-gaerdtii
                                             Cyathea vandeusenii
                                                   [Alsophila vandeusenii]
                                             Cyathea varians
                                                   [Cnemidaria varians]
                                             Cyathea vaupelii
                                                   [Sphaeropteris vaupelii var. lobulata]
                                                   [Sphaeropteris vaupelii]
                                             Cyathea vaupensis
                                                   [Cyathea macrosora var. vaupensis]
                                             Cyathea veitchiana
                                             Cyathea velaminosa
                                             Cyathea venezuelensis
                                             Cyathea venosa
                                             Cyathea vernicosa
                                             Cyathea verrucosa
                                                   [Sphaeropteris verrucosa]
                                             Cyathea vieillardii
                                                   [Alsophila vieillardii]
                                             Cyathea viguieri
                                                   [Alsophila viguieri]
                                             Cyathea vilhelmii
                                             Cyathea villosa
                                                   [Alsophila cipoensis]
                                             Cyathea vittata
                                                   [Sphaeropteris vittata]
                                             Cyathea walkerae
                                               Cyathea walkerae var. tripinnata
                                               Cyathea walkerae var. walkerae
                                             Cyathea wallacei
                                                   [Sphaeropteris wallacei]
                                             Cyathea weatherbyana
                                             Cyathea welwitschii
                                                   [Alsophila welwitschii]
                                             Cyathea wendlandii
                                             Cyathea wengiensis
                                                   [Alsophila hieronymi]
                                                   [Alsophila wengiensis]
                                                   [Cyathea woodwardioides var. hieronymi]
                                             Cyathea werffii
                                             Cyathea werneri
                                                   [Sphaeropteris werneri]
                                             Cyathea whitmeei
                                                   [Sphaeropteris samoensis]
                                             Cyathea williamsii
                                             Cyathea wilsonii
                                             Cyathea windischiana
                                             Cyathea wolfii
                                             Cyathea womersleyi
                                                   [Sphaeropteris womersleyi]
                                             Cyathea woodlarkensis
                                             Cyathea woodwardioides
                                                   [Alsophila woodwardioides]
                                                   [Cyathea araneosa]
                                                   [Cyathea woodwardioides var. woodwardioides]
                                             Cyathea woollsiana
                                                   [Alsophila woollsiana]
                                                   [Cyathea leichhardtiana var. woollsiana]
                                             Cyathea xantholepis
                                             Cyathea xenoxyla
                                             Cyathea zakamenensis
                                             Cyathea zamboangana
                                                   [Sphaeropteris zamboangana]
                                             Cyathea zollingeriana
                                             Cyathea zongoensis
                                             Sphaeropteris macarenensis
                                                   [Alsophila macarenensis]
                                             Sphaeropteris mollicula
                                     Cyrtomium
                                             Cyrtomium caryotideum
                                             Cyrtomium falcatum
                                                   [Polystichum falcatum]
                                             Cyrtomium fortunei
                                               Cyrtomium fortunei var. fortunei
                                     Cystopteris
                                             Cystopteris X illinoensis
                                             Cystopteris X wagneri
                                             Cystopteris bulbifera
                                                   [Filix bulbifera]
                                             Cystopteris douglasii
                                             Cystopteris fragilis
                                                   [Cystopteris dickieana]
                                                   [Cystopteris fragilis ssp. dickieana]
                                                   [Cystopteris fragilis var. angustata]
                                                   [Cystopteris fragilis var. woodsioides]
                                                   [Filix fragilis]
                                             Cystopteris fragilis x reevesiana
                                             Cystopteris laurentiana
                                                   [Cystopteris fragilis var. huteri]
                                                   [Cystopteris fragilis var. laurentiana]
                                             Cystopteris montana
                                                   [Filix montana]
                                             Cystopteris protrusa
                                                   [Cystopteris fragilis var. protrusa]
                                             Cystopteris reevesiana
                                                   [Cystopteris fragilis var. tenuifolia]
                                             Cystopteris tennesseensis
                                                   [Cystopteris fragilis var. simulans]
                                                   [Cystopteris fragilis var. tennesseensis]
                                             Cystopteris tenuis
                                                   [Cystopteris fragilis var. mackayi]
                                             Cystopteris undetermined
                                             Cystopteris utahensis
                                     Dryopteris
                                             Dryopteris X algonquinensis
                                             Dryopteris X australis
                                                   [Dryopteris clintoniana var. australis]
                                                   [Dryopteris cristata var. australis]
                                             Dryopteris X benedictii
                                             Dryopteris X boottii
                                             Dryopteris X brathaica
                                             Dryopteris X burgessii
                                             Dryopteris X correllii
                                             Dryopteris X dowellii
                                             Dryopteris X leedsii
                                             Dryopteris X mickelii
                                             Dryopteris X neowherryi
                                             Dryopteris X pittsfordensis
                                             Dryopteris X separabilis
                                             Dryopteris X slossoniae
                                             Dryopteris X triploidea
                                                   [Dryopteris austriaca var. fructuosa]
                                                   [Dryopteris intermedia var. fructuosa]
                                                   [Dryopteris spinulosa var. fructuosa]
                                             Dryopteris X uliginosa
                                             Dryopteris acutidens
                                             Dryopteris alboviridis
                                             Dryopteris arguta
                                             Dryopteris campyloptera
                                                   [Dryopteris austriaca]
                                                   [Dryopteris spinulosa var. americana]
                                             Dryopteris carthusiana
                                                   [Dryopteris austriaca var. spinulosa]
                                                   [Dryopteris spinulosa]
                                             Dryopteris celsa
                                                   [Dryopteris atropalustris]
                                                   [Dryopteris goldiana ssp. celsa]
                                                   [Dryopteris wherryi]
                                             Dryopteris chaerophylloides
                                             Dryopteris cinnamomea
                                             Dryopteris clintoniana
                                                   [Dryopteris X poyseri]
                                                   [Dryopteris cristata var. clintoniana]
                                             Dryopteris cordata
                                             Dryopteris crinalis
                                               Dryopteris crinalis var. crinalis
                                               Dryopteris crinalis var. podosorus
                                                     [Dryopteris podosora]
                                             Dryopteris cristata
                                             Dryopteris cyatheoides
                                             Dryopteris davallioides
                                             Dryopteris dentata
                                             Dryopteris effusa
                                             Dryopteris erythrosora
                                             Dryopteris expansa
                                                   [Dryopteris assimilis]
                                                   [Dryopteris dilatata ssp. americana]
                                                   [Dryopteris dilatata]
                                                   [Dryopteris spinulosa var. dilatata]
                                             Dryopteris filix-mas
                                             Dryopteris fragrans
                                                   [Dryopteris fragrans var. fragrans]
                                                   [Dryopteris fragrans var. remotiuscula]
                                             Dryopteris fuscoatra
                                               Dryopteris fuscoatra var. fuscoatra
                                               Dryopteris fuscoatra var. lamoureuxii
                                             Dryopteris glabra
                                               Dryopteris glabra var. alboviridis
                                                     [Dryopteris alboviridis]
                                               Dryopteris glabra var. flynnii
                                               Dryopteris glabra var. glabra
                                               Dryopteris glabra var. hobdyana
                                                     [Dryopteris hobdyana]
                                               Dryopteris glabra var. nuda
                                                     [Dryopteris nuda]
                                               Dryopteris glabra var. pusilla
                                                     [Dryopteris parvula]
                                                     [Dryopteris tenebrosa]
                                               Dryopteris glabra var. soripes
                                             Dryopteris goldiana
                                             Dryopteris hastata
                                             Dryopteris hawaiiensis
                                             Dryopteris hirta
                                             Dryopteris hobdyana
                                             Dryopteris imitata
                                             Dryopteris intermedia
                                                   [Dryopteris austriaca var. intermedia]
                                                   [Dryopteris spinulosa var. concordiana]
                                                   [Dryopteris spinulosa var. intermedia]
                                             Dryopteris ludoviciana
                                             Dryopteris macilenta
                                             Dryopteris marginalis
                                             Dryopteris mauiensis
                                             Dryopteris nuda
                                             Dryopteris parasitica
                                             Dryopteris parvula
                                             Dryopteris patens
                                             Dryopteris patula
                                             Dryopteris pedata
                                             Dryopteris podosora
                                             Dryopteris rossii
                                                   [Dryopteris patula var. rossii]
                                             Dryopteris rubiginosa
                                                   [Ctenitis rubiginosa]
                                                   [Nothoperanema rubiginosum]
                                             Dryopteris sandwicensis
                                             Dryopteris setigera
                                             Dryopteris sprengelii
                                             Dryopteris stegnogrammoides
                                             Dryopteris subbipinnata
                                             Dryopteris subincisa
                                             Dryopteris tenebrosa
                                             Dryopteris tetrapinnata
                                             Dryopteris thelypteris
                                             Dryopteris uliginosa
                                             Dryopteris unidentata
                                               Dryopteris unidentata var. paleacea
                                                     [Dryopteris acutidens]
                                               Dryopteris unidentata var. unidentata
                                             Dryopteris versicolor
                                             Dryopteris wallichiana
                                                   [Dryopteris paleacea]
                                                   [Dryopteris parallelogramma]
                                     Elaphoglossum
                                           [Hymenodium]
                                           [Peltapteris]
                                             Elaphoglossum aemulum
                                                   [Elaphoglossum conforme]
                                                   [Elaphoglossum gorgoneum]
                                             Elaphoglossum alatum
                                               Elaphoglossum alatum var. alatum
                                             Elaphoglossum apodum
                                             Elaphoglossum chartaceum
                                             Elaphoglossum crassicaule
                                                   [Elaphoglossum alatum var. crassicaule]
                                             Elaphoglossum crassifolium
                                                   [Elaphoglossum reticulatum]
                                             Elaphoglossum crinitum
                                                   [Acrostichum crinitum]
                                                   [Hymenodium crinitum]
                                             Elaphoglossum cubense
                                             Elaphoglossum decoratum
                                             Elaphoglossum dussii
                                             Elaphoglossum eggersii
                                             Elaphoglossum erinaceum
                                             Elaphoglossum fauriei
                                                   [Elaphoglossum alatum var. fauriei]
                                             Elaphoglossum glabellum
                                             Elaphoglossum herminieri
                                             Elaphoglossum latifolium
                                             Elaphoglossum lingua
                                             Elaphoglossum longifolium
                                                   [Acrostichum longifolium]
                                             Elaphoglossum martinicense
                                                   [Elaphoglossum underwoodianum]
                                             Elaphoglossum maxonii
                                                   [Elaphoglossum pteropus]
                                             Elaphoglossum muscosum
                                             Elaphoglossum paleaceum
                                                   [Elaphoglossum hirtum var. micans]
                                                   [Elaphoglossum hirtum]
                                             Elaphoglossum palmeri
                                             Elaphoglossum parvisquameum
                                                   [Elaphoglossum alatum var. parvisquamaeum]
                                                   [Elaphoglossum alatum var. parvisquameum]
                                                   [Elaphoglossum parvisquamaeum]
                                             Elaphoglossum pellucidum
                                                   [Elaphoglossum micradenium]
                                             Elaphoglossum peltatum
                                                   [Peltapteris peltata]
                                             Elaphoglossum petiolatum
                                               Elaphoglossum petiolatum var. dussii
                                                     [Elaphoglossum dussii]
                                               Elaphoglossum petiolatum var. petiolatum
                                             Elaphoglossum procurrens
                                             Elaphoglossum rigidum
                                                   [Elaphoglossum flaccidum]
                                             Elaphoglossum serpens
                                             Elaphoglossum simplex
                                                   [Elaphoglossum firmum]
                                             Elaphoglossum smithii
                                             Elaphoglossum spatulatum
                                                   [Elaphoglossum piloselloides]
                                                   [Elaphoglossum pusillum]
                                                   [Elaphoglossum spathulatum]
                                             Elaphoglossum wawrae
                                     Gymnocarpium
                                             Gymnocarpium X achriosporum
                                             Gymnocarpium X brittonianum
                                             Gymnocarpium X heterosporum
                                                   [Gymnocarpium heterosporum]
                                             Gymnocarpium X intermedium
                                             Gymnocarpium appalachianum
                                             Gymnocarpium disjunctum
                                                   [Dryopteris disjuncta]
                                                   [Gymnocarpium dryopteris ssp. disjunctum]
                                                   [Gymnocarpium dryopteris var. disjunctum]
                                             Gymnocarpium dryopteris
                                                   [Dryopteris dryopteris]
                                                   [Dryopteris linnaeana]
                                                   [Phegopteris dryopteris]
                                                   [Thelypteris dryopteris]
                                             Gymnocarpium jessoense
                                               Gymnocarpium jessoense ssp. parvulum
                                             Gymnocarpium robertianum
                                                   [Dryopteris robertiana]
                                                   [Gymnocarpium dryopteris var. pumilum]
                                                   [Phegopteris robertiana]
                                             Gymnocarpium x
                                     Lastreopsis
                                             Lastreopsis effusa
                                                   [Ctenitis effusa]
                                                   [Dryopteris effusa]
                                     Leptochilus
                                     Lomagramma
                                           [Lomogramma]
                                             Lomagramma cordipinna
                                             Lomagramma guianensis
                                                   [Leptochilus guianensis]
                                                   [Lomogramma guianensis]
                                     Maxonia
                                             Maxonia apiifolia
                                               Maxonia apiifolia var. apiifolia
                                     Megalastrum
                                             Megalastrum subincisum
                                                   [Ctenitis subincisa]
                                                   [Dryopteris subincisa]
                                                   [Megalastrum subincisa]
                                     Nothoperanema
                                     Olfersia
                                     Onoclea
                                             Onoclea sensibilis
                                             Onoclea struthiopteris
                                               Onoclea struthiopteris var. pensylvanica
                                     Peranema
                                             Peranema aspidioides
                                                   [Cyathea aspidioides]
                                     Phanerophlebia
                                             Phanerophlebia auriculata
                                                   [Cyrtomium auriculatum]
                                             Phanerophlebia umbonata
                                                   [Cyrtomium umbonatum]
                                     Polybotrya
                                             Polybotrya cervina
                                                   [Olfersia cervina]
                                     Polystichum
                                           [Tectaria abbreviatum]
                                             Polystichum X hagenahii
                                                   [Polystichum X marginale]
                                             Polystichum X potteri
                                             Polystichum acrostichoides
                                                   [Polystichum acrostichoides var. acrostichoides]
                                                   [Polystichum acrostichoides var. lonchitoides]
                                                   [Polystichum acrostichoides var. schweinitzii]
                                             Polystichum adiantiforme
                                             Polystichum aleuticum
                                             Polystichum andersonii
                                                   [Polystichum braunii ssp. andersonii]
                                             Polystichum bonseyi
                                             Polystichum braunii
                                                   [Polystichum braunii ssp. purshii]
                                                   [Polystichum braunii var. purshii]
                                             Polystichum calderonense
                                             Polystichum californicum
                                             Polystichum dudleyi
                                             Polystichum echinatum
                                                   [Polystichum triangulum]
                                             Polystichum falcatum
                                             Polystichum haleakalense
                                             Polystichum hillebrandii
                                             Polystichum imbricans
                                               Polystichum imbricans ssp. curtum
                                                     [Polystichum munitum ssp. curtum]
                                               Polystichum imbricans ssp. imbricans
                                                     [Polystichum munitum ssp. imbricans]
                                                     [Polystichum munitum ssp. nudatum]
                                                     [Polystichum munitum var. imbricans]
                                             Polystichum kruckebergii
                                             Polystichum kwakiutlii
                                             Polystichum lemmonii
                                                   [Polystichum mohrioides]
                                             Polystichum lonchitis
                                                   [Polystichum mohrioides var. lemmonii]
                                             Polystichum luctuosum
                                                   [Polystichum tsus-simense]
                                                   [Polystichum tsussimense]
                                             Polystichum microchlamys
                                                   [Aspidium microchlamys]
                                             Polystichum munitum
                                                   [Polystichum minutum]
                                                   [Polystichum munitum var. incisoserratum]
                                             Polystichum muricatum
                                             Polystichum platyphyllum
                                             Polystichum polyblepharum
                                             Polystichum polystichiforme
                                             Polystichum rhizophyllum
                                             Polystichum scopulinum
                                                   [Polystichum mohrioides var. scopulinum]
                                             Polystichum setigerum
                                                   [Polystichum alaskense]
                                                   [Polystichum braunii ssp. alaskense]
                                                   [Polystichum braunii var. alaskense]
                                     Rumohra
                                             Rumohra adiantiformis
                                                   [Polystichum adiantiforme]
                                     Woodsia
                                             Woodsia X abbeae
                                                   [Woodsia confusa]
                                                   [Woodsia oregana var. squammosa]
                                             Woodsia X gracilis
                                                   [Woodsia ilvensis var. gracilis]
                                             Woodsia X kansana
                                             Woodsia X maxonii
                                             Woodsia X tryonis
                                             Woodsia alpina
                                                   [Woodsia alpina var. bellii]
                                                   [Woodsia glabella var. bellii]
                                             Woodsia cochisensis
                                             Woodsia glabella
                                             Woodsia ilvensis
                                             Woodsia mexicana
                                             Woodsia neomexicana
                                             Woodsia obtusa
                                               Woodsia obtusa ssp. obtusa
                                               Woodsia obtusa ssp. occidentalis
                                             Woodsia oregana
                                               Woodsia oregana ssp. cathcartiana
                                                     [Woodsia cathcartiana]
                                                     [Woodsia oregana var. cathcartiana]
                                               Woodsia oregana ssp. oregana
                                               Woodsia oregana ssp cathcartiana
                                             Woodsia phillipsii
                                             Woodsia plummerae
                                             Woodsia scopulina
                                               Woodsia scopulina ssp. appalachiana
                                                     [Woodsia appalachiana]
                                                     [Woodsia scopulina var. appalachiana]
                                               Woodsia scopulina ssp. laurentiana
                                               Woodsia scopulina ssp. scopulina
                                                     [Woodsia oregana var. lyallii]
                                             Woodsia x x schaakii
                                     X Dryostichum
                                             X Dryostichum singulare