Thallus crustose, continuous; areoles flat, thin; surface whitish gray; apothecia adnate, lecanorine; disc brown to blackish brown; margin concolorous with thallus; ; amphithecium with large crystals insoluble in K; epihymenium brown, with pigment and crystals dissolving in K; hymenium hyaline; ascospores hyaline, simple; spot tests K+ yellow, P+ pale yellow