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Didymium melanopus var. clavus (Alb. & Schwein.) Wallr., Fl. crypt. Germ.
2:370
(1833)
[see pdf]
[Comb. superfl., previously proposed by Fries, 1829] This name is a synonym of: Didymium clavus (Alb. & Schwein.) Rabenh. |