References from the California Lichen Catalog

BALTZO, D. E. 2002 (2001).

San Francisco Watershed lichens — a more comprehensive list. Bulletin of the California Lichen Society 8: 44–56.

WETMORE, C. M. 1994.

The lichen genus Caloplaca in North and Central America with brown or black apothecia. Mycologia 86: 813–838.