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.^[1] As of June 2023^[update], Plants of the World Online continued to treat the genus as a synonym of Woodsia.^[2]

Species

As of June 2023^[update], World Ferns accepted 20 species and two hybrids:^[3]

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.

^ Lu, N.T.; Zhou, X.-M.; Zhang, L.; Knapp, R.; Li, C.-X.; Fan, X.-P.; Zhou, L.; Wei, H.-J.; Lu, J.-M., Xu, B.; Peng, Y.-L.; Gao, X.-F. & Zhang, L.-B. (2020), "A global plastid phylogeny of the cliff fern family Woodsiaceae and a two-genus classification of Woodsiaceae with the description of ×Woodsimatium nothogen. nov.", Taxon, 68 (6): 1149–1172, doi:10.1002/tax.12180, S2CID 213706008{{citation}}: CS1 maint: multiple names: authors list (link)
^ "Physematium Kaulf.", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2023-06-13
^ Hassler, Michael, "Physematium", World Ferns, retrieved 2023-06-13

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