References from the California Lichen Catalog
- HASSE, H. E. 1898a.
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Lichens of Southern California.
Los Angeles.
- HASSE, H. E. 1903e.
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Additions to the lichen flora of southern California, Part II.
Bulletin of the Southern California Academy of Sciences 2: 58–60.
- 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.
- McCLATCHIE, A. J. 1897.
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Seedless plants of southern California. Protophytes — Pteridophytes.
Proceedings of the Southern California Academy of Sciences 1: 363–370.
Complete references section