Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera, divided over five subfamilies. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteridoid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level.
The Athyriaceae are a family of terrestrial ferns in the order Polypodiales. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the family is placed in the suborder Aspleniineae, and includes two genera. Alternatively, it may be treated as the subfamily Athyrioideae of a very broadly defined family Aspleniaceae. The family has with a cosmopolitan distribution.
Blechnum, known as hard fern, is a genus of ferns in the family Blechnaceae, subfamily Blechnoideae, according to the Pteridophyte Phylogeny Group classification of 2016. Two very different circumscriptions of the genus are used by different authors. In the PPG I system, based on Gasper et al. (2016), Blechnum is one of 18 genera in the subfamily Blechnoideae, and has about 30 species. Other sources use a very broadly defined Blechnum s.l., including accepting only two other genera in the subfamily. The genus then has about 250 species. In the PPG I circumscription, the genus is mostly neotropical, with a few southern African species.
Austroblechnum penna-marina, synonym Blechnum penna-marina, known as Antarctic hard-fern, alpine water fern and pinque, is a species of fern in the family Blechnaceae, with a natural range from the Araucanía Region to the south and from the coast to the tree line of the Magellanic forests in Chile and adjacent areas of Argentina. It is also found in New Zealand, Australia and some Pacific islands. It is evergreen and grows to 20 cm (8 in).
Pteris ensiformis, the slender brake, silver lace fern, sword brake fern, or slender brake fern, is a plant species of the genus Pteris in the family Pteridaceae. It is found in Asia and the Pacific.
Vittarioideae is a subfamily of the fern family Pteridaceae, in the order Polypodiales. The subfamily includes the previous families Adiantaceae and Vittariaceae.
Cheilanthoideae is one of the five subfamilies of the fern family Pteridaceae. The subfamily is thought to be monophyletic, but some of the genera into which it has been divided are not, and the taxonomic status of many of its genera and species remains uncertain, with radically different approaches in use as of December 2019.
Antrophyopsis is a genus of vittarioid ferns, a member of subfamily Vittarioideae and family Pteridaceae. Like other vittarioids, ferns in the genus are epiphytes with simple, straplike leaves. They are native to tropical Africa and islands of the Indian Ocean. The presence of a midrib in their leaves, the shape of their spores, and the shape of cells at the tip of their paraphyses help to distinguish members of the genus from other vittarioids. The group was raised to the level of genus in 2016.
Lateristachys is a genus of lycophytes in the family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016, it is placed in the subfamily Lycopodielloideae. Some sources do not recognize the genus, sinking it into Lycopodiella. Lateristachys species are native to the Philippines, Australia and New Zealand.
Onychium is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae.
Pterozonium is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. Species are mainly found in north-western South America, as well as Costa Rica.
Tryonia is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. Species are native to the east of Brazil and to Uruguay.
Ananthacorus is a genus of ferns in the subfamily Vittarioideae of the family Pteridaceae with a single species Ananthacorus angustifolius. Its native distribution ranges from Mexico through Central America to northern South America. It has been introduced into parts of Malesia.
Polytaenium is a genus of ferns in the subfamily Vittarioideae of the family Pteridaceae. Species are native to Mexico and Southern America.
Radiovittaria is a genus of ferns in the subfamily Vittarioideae of the family Pteridaceae. Species are native to southeast Mexico and northern Southern America.
Rheopteris is a genus of ferns in the subfamily Vittarioideae of the family Pteridaceae with a single species, Rheopteris cheesmaniae, in the Pteridophyte Phylogeny Group classification of 2016. Other sources sink the genus into Monogramma, a genus not recognized in PPG I. The species is native to New Guinea.
Vaginularia is a genus of ferns in the subfamily Vittarioideae of the family Pteridaceae in the Pteridophyte Phylogeny Group classification of 2016. Other sources sink the genus into Monogramma, a genus not recognized in PPG I.
Cheiloplecton is a genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae with a single species Cheiloplecton rigidum, native to Mexico, Guatemala, El Salvador and Honduras.
Trachypteris is a small genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae. Three species are native to the tropical South America, one to Madagascar.
Elaphoglossum is a genus of ferns in the family Dryopteridaceae, subfamily Elaphoglossoideae, in the Pteridophyte Phylogeny Group classification of 2016.
