in Webb & Berthelot, Hist. nat. Iles Canar. (Paris) 3, 2: 129 (1840). Basionym: Lichen azureus Sw., in Acharius, Lich. suec. prodr. (Linköping): 137 (1799) [1798].
Basionym: Lichen azureus Sw., in Acharius, Lich. suec. prodr. (Linköping): 137 (1799) [1798].