Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2007. Lichen Flora of the Greater Sonoran Desert Region. Vol 3.
Thallus: stiff cortex: thick (6-14%) distinctly shiny, sometimes orange pigmented, at least in part, especially on main branches medulla: compact, rarely dense. Substrate and ecology: on bark in desert coastal scrub communities, on Fouqueria spp., on Machaerocereus spp., etc. between 0 and 220 m or in oak forests, on Quercus spp. between 1200 and 1400 m World and Sonoran distribution: Baja California and Baja California Sur.