Nat. Arr. Brit. Pl. (London) 1: 504 (1821). Basionym: Lichen nothus Ach., Lich. suec. prodr. (Linköping): 19 (1799) [1798].
Basionym: Lichen nothus Ach., Lich. suec. prodr. (Linköping): 19 (1799) [1798].