LICHALP

Thelidium submethorium (Vain.) Zschacke

Syn.: Verrucaria submethoria Vain.

Lichenised.

Substrate:

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)

Note: a rare species of siliceous substrata in clean creeks and rivers of high mountain ranges, with optimum above treeline; in the Alps there are only a few scattered records