References from the California Lichen Catalog

HASSE, H. E. 1906.

Contributions to the lichen flora of southern California. Bulletin of the Southern California Academy of Sciences 5: 38–45.

TUCKERMAN, E. 1866.

Lichens of California, Oregon, and the Rocky Mountains, so far as yet known. J. S. and C. Adams, Amherst. 35 pp.

WILLEY, H. 1873a.

A list of North American lichens arranged according to Professor E. Tuckerman's “Genera Lichenum”. New Bedford.

ZAHLBRUCKNER, A. 1928.

Catalogus Lichenum Universalis, Vol. V. Leipzig, Berlin.