References from the California Lichen Catalog

BREUSS, O. 2002.

Catapyrenium, pp. 125–128; Clavascidium, pp. 158–159; Endocarpon, pp. 181–187; Placidiopsis, pp. 383–384; Placidium, pp. 393–394; Placopyrenium, pp. 394–397; Thrombium, pp. 483–484, in T. H. Nash III, B. D. Ryan, C. Gries, & F. Bungartz (eds.), Lichen flora of the Greater Sonoran Desert region, Vol. 1. Lichens Unlimited, Arizona State University, Tempe.

HERRE, A. W. C. T. 1945.

Lichen distribution in California. The Bryologist 48: 1–7.

TUCKER, S. C., & W. P. JORDAN. 1979 (1978).

A catalog of California lichens. Wasmann Journal of Biology 36: 1–105.