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nounferns: a large family that in some classification systems has been subdivided into several families (including Aspleniaceae and Blechnaceae and Davalliaceae and Dennstaedtiaceae and Dryopteridaceae and Oleandraceae and Pteridaceae)
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Definition that contains polypodiaceae
- asplenium in some classification systems placed in family Polypodiaceae
- genus adiantum cosmopolitan genus of ferns: maidenhair ferns; in some classification systems placed in family Polypodiaceae or Adiantaceae
- parkeriaceae coextensive with the genus Ceratopteris; sometimes included in family Polypodiaceae
- family dennstaedtiaceae one of a number of families into which Polypodiaceae has been subdivided in some classification systems
- family athyriaceae alternative names for one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems
- genus woodsia genus of small to medium-sized usually rock-inhabiting ferns of temperate and cold regions; in some classification systems placed in Polypodiaceae
- genus oleandra or family Polypodiaceae: tropical epiphytic or terrestrial ferns
- dennstaedtia chiefly terrestrial ferns; in some classification systems placed in family Polypodiaceae
- woodwardia in some classification systems placed in family Polypodiaceae: chain ferns
- cyrtomium small genus of tropical Asiatic greenhouse ferns; in some classifications placed in Polypodiaceae