LICHALP

Physcia caesia (Hoffm.) Fürnr. var. rhaetica Frey

Lichenised.

Substrate: intermediate rocks (such as calciferous schists), 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: a morph with an orange medulla, most frequent in continental Alpine areas, which is worth of further study.