Definition that contains family polypodiaceae
- genus dennstaedtia chiefly terrestrial ferns; in some classification systems placed in family Polypodiaceae
- family parkeriaceae coextensive with the genus Ceratopteris; sometimes included in family Polypodiaceae
- cryptogramma sometimes placed in family Polypodiaceae or Cryptogrammataceae
- pityrogramma terrestrial tropical ferns having fronds with powdery yellowish or white undersides; sometimes placed in family Polypodiaceae or Adiantaceae
- acrostichum in some classification systems placed in family Polypodiaceae
- genus phyllitis a genus of ferns belonging to the family Polypodiaceae (in some classification systems included in genus Asplenium)
- genus asplenium in some classification systems placed in family Polypodiaceae
- genus cheilanthes small evergreen ferns: lipferns; in some classifications placed in family Polypodiaceae or Adiantaceae
- family blechnaceae one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; includes genera Blechnum, Doodia, Sadleria, Stenochlaena, and Woodwardia
- blechnaceae one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; includes genera Blechnum, Doodia, Sadleria, Stenochlaena, and Woodwardia