On red clay soil in a biotic crust community. None found on rabbit dung.
Burton Mesa Ecological Reserve. Two apothecia and a little thallus on an old Artemisia californica branch found lying in the sand, with Buellia sp. and Caloplaca californica.
Green lichen on rabbit dropping. Likely with Caloplaca subpyraceella (orange lichen).
Growing with Caloplaca subpyraceella on old rabbit and rodent droppings on open sandy soil with bryophyte, liverwort, and cladonia mats. In Adenostoma, Arctostaphylos, Artemisia, Baccharis, Yucca shrubland.