References from the California Lichen Catalog

BRODO, I. M., S. D. SHARNOFF, & S. SHARNOFF. 2001.

Lichens of North America. Yale University Press, New Haven.

BÜDEL, B., M. SCHULTZ, & T. H. NASH III. 2002.

Heppia. pp. 204–207, 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.

FINK, B. 1935.

The lichen flora of the United States. Ann Arbor.

HASSE, H. E. 1903c.

Additions to the lichen flora of southern California. Bulletin of the Southern California Academy of Sciences 2: 52–54.

HENSSEN, A. 1994.

Contribution to the morphology and species delimitation in Heppia s. str. (lichenized Ascomycotina). Acta Botanica Fennica 150: 57–73.

ROBERTSON, J., & R. ROBERTSON. 2002 (2001).

New and interesting records of lichens from California. Bulletin of the California Lichen Society 8: 56–58.

TUCKER, S. C. 2002 (2001).

New reports or divergences in range for lichens of California, based on Lichens of North America by I. Brodo, S. D. Sharnoff, and S. Sharnoff, 2001. Bulletin of the California Lichen Society 8: 59–71.

WETMORE, C. M. 1970.

The lichen family Heppiaceae in North America. Annals of the Missouri Botanical Garden 57: 158–209.

ZAHLBRUCKNER, A. 1902.

Diagnosen neuer und genügend beschriebener kalifornischer Flechten. Beihefte zum Botanischen Zentralblatt 13: 149–163.