Basionym Name:Parmelia membranacea var. ruginosa Schaer., Lich. helv. spicil. 11: 524 (1842)
Homotypic synonyms:Collema ruginosum (Schaer.) Schaer., Enum. critic. lich. europ. (Bern): 251 (1850)Lathagrium ruginosum (Schaer.) Bagl., Nuovo G. bot. ital. 11: 119 (1879)Leptogium ruginosum (Schaer.) Nyl., Bot. Notiser(10-11): 154 (1853)Synechoblastus ruginosus (Schaer.) Hepp, Flecht. Europ. 8: no. 421 (1857)