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  Plantae
      Charophyta
        Streptophytina
            Equisetopsida
              Polypodiidae
                    Polypodiales
                            Blechnaceae
                                     Anchistea
                                     Austroblechnum
                                             Austroblechnum andinum
                                                   [Blechnum andinum]
                                             Austroblechnum divergens
                                                   [Blechnum divergens]
                                             Austroblechnum lehmannii
                                                   [Blechnum lehmannii]
                                                   [Blechnum maxonii]
                                                   [Blechnum mexiae]
                                             Austroblechnum lherminieri
                                                   [Blechnum lherminieri]
                                             Austroblechnum membranaceum
                                                   [Blechnum membranaceum]
                                                   [Lomaria membranacea]
                                             Austroblechnum patersonii
                                               Austroblechnum patersonii subsp. patersonii
                                                     [Blechnum patersonii]
                                             Austroblechnum penna-marina
                                               Austroblechnum penna-marina subsp. penna-marina
                                                     [Blechnum penna-marina]
                                             Austroblechnum stoloniferum
                                                   [Blechnum stoloniferum]
                              Blechnoideae
                                     Brainea
                                             Brainea insignis
                                     Diploblechnum
                                             Diploblechnum fraseri
                                                   [Lomaria fraseri]
                                     Lomaridium
                                             Lomaridium attenuatum
                                                   [Blechnum attenuatum]
                                                   [Lomaria attenuata]
                                                   [Onoclea attenuata]
                                             Lomaridium binervatum
                                                   [Blechnum meridense var. costaricense]
                                             Lomaridium ensiforme
                                                   [Blechnum ensiforme]
                                     Lomariocycas
                                             Lomariocycas aurata
                                                   [Blechnum buchtienii]
                                             Lomariocycas schomburgkii
                                                   [Blechnum schomburgkii]
                                             Lomariocycas tabularis
                                                   [Blechnum tabulare]
                                             Lomariocycas underwoodiana
                                                   [Blechnum underwoodianum]
                                     Neoblechnum
                                             Neoblechnum brasiliense
                                                   [Blechnum brasiliense]
                                                   [Blechnum nigrosquamatum]
                                     Oceaniopteris
                                             Oceaniopteris gibba
                                                   [Lomaria gibba]
                                             Oceaniopteris vittata
                                                   [Blechnum bamlerianum]
                                     Parablechnum
                                             Parablechnum capense
                                                   [Blechnum capense]
                                             Parablechnum cordatum
                                                   [Blechnum arborescens]
                                                   [Blechnum raddianum]
                                                   [Lomaria gilliesii]
                                             Parablechnum falciforme
                                                   [Blechnum falciforme]
                                             Parablechnum lineatum
                                                   [Blechnum lineatum]
                                             Parablechnum procerum
                                                   [Lomaria procera]
                                             Parablechnum schiedeanum
                                                   [Blechnum schiedeanum]
                                             Parablechnum wattsii
                                                   [Blechnum wattsii]
                                     Sadleria
                                             Sadleria cyatheoides
                                             Sadleria pallida
                                             Sadleria squarrosa
                                                   [Gymnogramma sadlerioides]
                                     Blechnopsis
                                             Blechnopsis orientalis
                                                   [Blechnum orientale]
                                     Blechnum
                                             Blechnum arcuatum
                                             Blechnum asplenioides
                                             Blechnum auriculatum
                                             Blechnum australe
                                                   [Lomaria minor]
                                             Blechnum banksii
                                             Blechnum boreale
                                             Blechnum discolor
                                             Blechnum fragile
                                             Blechnum gibbum
                                             Blechnum gracile
                                                   [Blechnum fraxineum]
                                                   [Blechnum intermedium]
                                             Blechnum hastatum
                                             Blechnum laevigatum
                                                   [Blechnum juergensii]
                                             Blechnum lanceola
                                                   [Blechnum lanceolatum]
                                             Blechnum longifolium
                                             Blechnum meridense
                                             Blechnum minus
                                             Blechnum occidentale
                                                   [Blechnum glandulosum]
                                               Blechnum occidentale var. minor
                                             Blechnum polypodioides
                                                   [Blechnum blechnoides]
                                                   [Blechnum unilaterale]
                                             Blechnum punctulatum
                                                   [Lomaria densa]
                                                   [Lomaria punctulata]
                                             Blechnum serrulatum
                                             Blechnum spicant
                                                   [Lomaria spicant]
                                                   [Osmunda spicant]
                                                   [Struthiopteris spicant]
                                               Blechnum spicant var. elongatum
                                             Blechnum volubile
                                             Blechnum ×confluens
                                                   [Blechnum ×triangulare]
                                     Cranfillia
                                             Cranfillia fluviatilis
                                                   [Blechnum fluviatile]
                                                   [Lomaria fluviatilis]
                                             Cranfillia vulcanica
                                                   [Blechnum vulcanicum]
                                     Doodia
                                             Doodia aspera
                                             Doodia caudata
                                                   [Doodia rupestris]
                                             Doodia media
                                                   [Blechnum medium]
                                     Lomaria
                                             Lomaria euphlebia
                                             Lomaria patersoni
                                             Lomaria vulcanica
                                     Lorinseria
                                     Stenochlaena
                                             Stenochlaena milnei
                                             Stenochlaena tenuifolia
                                                   [Lomaria tenuifolia]
                                                   [Lomariopsis tenuifolia]
                              Stenochlaenoideae
                                     Telmatoblechnum
                                             Telmatoblechnum indicum
                                                   [Blechnum indicum]
                                     Woodwardia
                                             Woodwardia angustifolia
                                             Woodwardia areolata
                                                   [Lorinseria areolata]
                                             Woodwardia fimbriata
                                                   [Woodwardia chamissoi]
                                             Woodwardia radicans
                                             Woodwardia virginica
                                                   [Anchistea virginica]
                              Woodwardioideae
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