''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a

molecular phylogenetic Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

study showed its distinctiveness. ,

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

continued to treat the genus as a synonym of ''Woodsia''.

Species

, World Ferns accepted 20 species and two hybrids: *''

Physematium fragile ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' (Trevis.) Kunze *'' Physematium indusiosum'' (Christ) Li Bing Zhang, N.T.Lu & X.F.Gao *''

Physematium kangdingense ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' (H.S.Kung, Li Bing Zhang & X.S.Guo) Li Bing Zhang, N.T.Lu & X.F.Gao * ''Physematium'' × ''kansanum'' (R.E.Brooks) Li Bing Zhang, N.T.Lu & X.F.Gao *''

Physematium manchuriense ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' (Hook.) Nakai * ''Physematium'' × ''maxonii'' (R.M.Tryon) Li Bing Zhang, N.T.Lu & X.F.Gao *''

Physematium mexicanum ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' (Fée) comb.ined. *''

Physematium molle ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' Kaulf. *''

Physematium montevidense ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' (Spreng.) Shmakov *''

Physematium neomexicanum ''Physematium neomexicanum'', the New Mexican cliff fern, is a fern species native to the Southwestern United States and northern Mexico. Distribution The core of its range is in Coahuila, Nuevo León, Zacatecas, New Mexico, southeastern Ut ...

'' (Windham) Li Bing Zhang, N.T.Lu & X.F.Gao *'' Physematium obtusum'' (Spreng.) Hook. *''

Physematium oreganum ''Physematium oreganum'', the Oregon cliff fern, is a perennial fern in the family Woodsiaceae. This plant is native to a large part of the western and northern United States and Canada. References External linksJepson Manual Treatment

'' (D.C.Eaton) Trevis. *''

Physematium phillipsii ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' (Windham) Li Bing Zhang, N.T.Lu & X.F.Gao *'' Physematium plummerae'' (Lemmon) Li Bing Zhang, N.T.Lu & X.F.Gao *''

Physematium pubescens ''Physematium'' is a genus of ferns in the family Woodsiaceae. It was treated as a synonym of '' Woodsia'' until 2020 when a molecular phylogenetic study showed its distinctiveness. , Plants of the World Online continued to treat the genus as a ...

'' (Spreng.) Bevis *''

Physematium scopulinum ''Physematium scopulinum'', also called ''Woodsia scopulina'', is a deciduous perennial fern in the family Woodsiaceae, with the common name Rocky Mountain Woodsia,. This plant is native to the western and northern United States and Canada. ...

'' Trevis.

References

Fern genera {{Fern-stub