Clavascidium lacinulatum is a dark brown squamulous terricolous lichen.Lichen Flora of the Greater Sonoran Desert Region. Vol 1, Nash, T.H., Ryan, B.D., Gries, C., Bugartz, F., (eds.), 2001, Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, In Joshua Tree National Park, it is the most common of the biological soil crust lichens.Photo Gallery, Joshua Tree Lichens, National Park Service It is notable for its ability to withstand UVC ultraviolet radiation for extended periods of time.
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