Polytrichastrum formosum (Hedw.) G.L. Sm. [ Polytrichum formosum Hedw.]
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Polytrichastrum formosum (Hedw.) G.L. Sm. [ Polytrichum formosum Hedw.] [Polytrichaceae]
T.F.L. Nees von Esenbeck, M.F. Wijhe (Weyhe), Pl. Medicin., vol. 2 : , fig. C (1828) [A. Henry]