LICHALP

Ochrolechia xanthostoma (Sommerf.) K. Schmitz & Lumbsch

Syn.: Aspicilia poriniformis (Nyl.) Arnold, Pertusaria poriniformis (Nyl.) Clauzade & Cl. Roux, Pertusaria xanthostoma (Sommerf.) Fr., Porina xanthostoma Sommerf.

Lichenised.

Substrate: bark, plant debris, siliceous rocks

Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) 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: on bark, but also on plant debris, more rarely on siliceous rocks in upland areas. The Italian records are rather dubious (see Nimis 2016).