Lichen Flora of the Greater Sonoran Desert Region (Tempe) 3: 294 (2007).
Type: USA: California: Orange County: Santa Ana Mountains: Weir Canyon: north-facing sandstone out crop in mesic, mixed chaparral 33°50'18"N, 117°44'08"W, 280 m, Knudsen 6435 (Holotype, UCR; Isotype, ASU).
Type locality: USA, California, Orange County, Santa Ana Mountains, Weir Canyon, north-facing sandstone out crop in mesic, mixed chaparral, 280 m, Knudsen 6435 (Holotype, UCR; Isotype, ASU).
Type locality coordinates: 33°50'18"N, 117°44'08"W.
Chemistry: No lichen substances (Knudsen & Standley 2007: 294).