Physematium

Physematium
''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 synonym of ''Woodsia''. Species , World Ferns accepted 20 species and two hybrids: *'' Physematium fragile'' (Trevis.) Kunze *'' Physematium indusiosum'' (Christ) Li Bing Zhang, N.T.Lu & X.F.Gao *'' Physematium kangdingense'' (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'' (Hook.) Nakai * ''Physematium'' × ''maxonii'' (R.M.Tryon) Li Bing Zhang, N.T.Lu & X.F.Gao *'' Physematium mexicanum'' (Fée) comb.ined. *'' Physematium molle'' Kaulf. *'' Physematium montevidense'' (Spreng.) Shmakov *'' Physematium neomexicanum'' (Windham) Li Bing Zhang, N.T.Lu & X.F.Gao *'' Physematium obtusum'' (Spreng.) Hook. *''Physematium ...
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