Can. J. Bot. 41: 1340 (1963). Basionym: Pannularia microphylliza Nyl., in Hasse, Lichens of South California, edn 2: 9 (1898).
Basionym: Pannularia microphylliza Nyl., in Hasse, Lichens of South California, edn 2: 9 (1898).