Constancea 84, 2006
University and Jepson Herbaria
California Lichen Catalog

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.
TUCKER, S. C., & W. P. JORDAN. 1979 (1978).
A catalog of California lichens. Wasmann Journal of Biology 36: 1–105.
Complete references section