Syst. Veg. 4, 1: 272 (1827).

Basionym: Lichen cariosus Ach., Lichengr. Suec. Prodr.: 198 (1977) ["1798"].

Type locality: Sweden, E. Acharius s.n. (H-ACH 1577A - lectotype; ?BM, ?UPS-Ach - isolectotypes). Lectotypification by Stenroos et al. (1992).