References from the California Lichen Catalog

SCHEIDEGGER, C., & M. SCHULTZ. 2004.

Harpidium, pp. 133–134, 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.

SCHULTZ, M., C. PRINTZEN, & C. SCHEIDEGGER. 2001 (2000).

Harpidium nashii sp. nov., a new species and a genus new to North America. The Bryologist 103: 802–805.