References from the California Lichen Catalog

KOLB, A., & T. SPRIBILLE. 2001.

Calicium corynellum (Ach.) Ach. in the United States, and Calicium montanum Tibell new for North America. Evansia 18: 90–92.

TIBELL, L., & B. D. RYAN. 2004.

Calicium, pp. 39–44; Chaenotheca, pp. 57–61; Chaenothecopsis, pp. 639–641; Cyphelium, pp. 82–88; Microcalicium, pp. 669–673; Phaeocalicium, pp. 399–401; Sphaerophorus, pp. 507–508; Stenocybe, pp. 511–513; Texosporium, pp. 532–533; Thelomma, pp. 533–536, in T. H. Nash III, B. D. Ryan, P. Diederich, C. Gries, & F. Bungartz (eds.), Lichen flora of the Greater Sonoran Desert region, Vol. 2. Lichens Unlimited, Arizona State University, Tempe.

WETMORE, C. M. 1985.

Lichens and air quality in Sequoia National Park. Final Report, (U. S.) National Park Service Contract CX 0001–2-0034.