References from the California Lichen Catalog
- ORCUTT, C. R. 1909.
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Botany of southern California. Lichens.
American Plants, 2: 400–401.
- TUCKER, S. C., & W. P. JORDAN. 1979 (1978).
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A catalog of California lichens.
Wasmann Journal of Biology 36: 1–105.
Complete references section