References from the California Lichen Catalog
- FINK, B. 1935.
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The lichen flora of the United States.
Ann Arbor.
- HASSE, H. E. 1913b.
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The lichen flora of southern California.
Contributions from the United States National Herbarium 17: 1–132.
- HERRE, A. W. C. T. 1942c.
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Additions to and comments upon the lichen flora of the Santa Cruz Peninsula, California.
American Midland Naturalist 28: 752–755.
- MERRILL, G. K. 1923.
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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.
- TUCKER, S. C., & W. P. JORDAN. 1979 (1978).
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A catalog of California lichens.
Wasmann Journal of Biology 36: 1–105.
- TUCKERMAN, E. 1872.
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Genera Lichenum. An arrangement of the North American lichens.
Edwin Nelson, Amherst. 281 pp. + index.
- WILLEY, H. 1873a.
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A list of North American lichens arranged according to Professor E. Tuckerman's “Genera Lichenum”.
New Bedford.
- WILLEY, H. 1890.
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A synopsis of the genus Arthonia.
New Bedford.
Complete references section