Altitudinal distribution: alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)
Note: a species with a greenish-yellow thallus, the inner areoles apically papillate-isidioid and with an amyloid medulla, older areoles apically decorticated and blackish; on siliceous rocks in wind-exposed sites; so far only known from the high alpine belt in Switzerland.
