Substrate: Calcareous soil in dry areas, occasionally with A. hispida.
Range: Uncommon in eastern Montana, southern Idaho, & eastern Oregon.
Description: Thallus of erect hemispherical to spherical cushions or knobby balls; branches terete or nearly so. Branching dichotomous, very compact; branches short, thick, blunt, tipped with conspicuous pseudocyphellae
Bibliography: Macrolichens of the Pacific Northwest, by McCune & Geiser
Database Entry: Distance Everheart 12-28-13