Known in CA only from Morro Bay and Baywood-Los Osos areas. Threatened by habitat loss, recreational activities, and non-native plants. Often forms biological soil crusts with other lichens and mosses. See Bulletin of the California Lichen Society 14(2):40-44 (2007) for CALS Conservation Committee sponsorship.
California Native Plant Society, Rare Plant Program.
Inventory of Rare and Endangered Plants of California (online edition, v8-03), with lichen data from the California Lichen Society.
Website http://www.rareplants.cnps.org [accessed ].