References from the California Lichen Catalog
- HASSE, H. E. 1913b.
-
The lichen flora of southern California.
Contributions from the United States National Herbarium 17: 1–132.
- MERRILL, G. K. 1923.
-
Lichens. Pp. 358–377,
in C. F. Millspaugh and L. W. Nuttall (eds.), Flora of Santa Catalina Island, California.
Publications of the Field Museum of Natural History, Botanical Series, vol. 5.
Complete references section