Symb. bot. upsal. 22(no. 1): 44 (1977).

Basionym: Lichen orbicularis Neck., Method. Muscor.: 88 (1771).

Synonyms: Index Fungorum

Ecology: Data lacking.

Molecular data: Genbank

Distribution: Database

Note: There is a variety hueana (Harm.) Erichsen (1930: 57) with a yellow medulla and yellow or orange coloured soralia, which react K+ violett (Erichsen 1957: 392).