Physematium Explained

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 oreganum (D.C.Eaton) Trevis.
• Physematium phillipsii (Windham) Li Bing Zhang, N.T.Lu & X.F.Gao
• Physematium plummerae (Lemmon) Li Bing Zhang, N.T.Lu & X.F.Gao
• Physematium pubescens (Spreng.) Bevis
• Physematium scopulinum Trevis.