Syst. Veg. 4, 1: 273 (1827).

Basionym: Cenomyce chlorophaea Flörke ex Sommerf., Suppl. Fl. Lapp.: 130 (1826).

Type locality: Norway, Nordland, Saltdalen, C. Sommerfelt s.n. (O - lectotype). Lectotypification by Ahti (1993: 72).

Chemistry: Fumarprotocetraric acid (Will-Wolf 1998: 329).