References from the California Lichen Catalog

FINK, B. 1935.

The lichen flora of the United States. Ann Arbor.

TUCKERMAN, E. 1888.

A synopsis of the North American Lichens, Pt. 2, comprising of the Lecidacei, and (in part) the Graphidacei. E. Anthony & Sons, Printers, New Bedford. 176 pp.