Found frequently over rock in open coastal and inland sites at lower elevations. BC to California and West Eurasia. Small to medium stratified foliose lichens, corticate above and below, nonsorediate, isidiate or not, nonpseudocyphellate, lobes closely appressed (in BC), short to elongate, averaging to 1–3 (–5) mm wide, thin. Upper surface brown, lower surface black, shiny, bearing short, simple rhizines. Medulla white. Photobiont green.