References from the California Lichen Catalog
- HERRE, A. W. C. T. 1910.
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The lichen flora of the Santa Cruz peninsula, California.
Proceedings of the Washington Academy of Sciences 12(2): 27–269.
- WEST, R., & J. DOELL. 1995.
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Marin County field trip.
Bulletin of the California Lichen Society 2(1): 10–11.
Complete references section