Syn.: Umbilicaria vellea (L.) Ach. var. dendrophora Poelt
Lichenised.
Substrate: siliceous rocks
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 resembling U. vellea, but with different thalloconidia plus other anatomical differences (algal layer discontinuous and medulla sharply separated from lower cortex), lacking lichen substances; on steeply inclined faces of siliceous cliffs and large boulders; widespread in Europe but rather rare, from the subarctic zone to the alpine belt; in the study area only known from the Eastern Alps (Austria).
