LICHALP

Cetrariella sorediella (Lettau) V.J. Rico & A. Thell

Syn.: Cetraria commixta (Nyl.) Th. Fr. f. sorediella Lettau, Melanelia commixta (Nyl.) A. Thell var. sorediella (Lettau) Hafellner & Türk, Melanelia sorediella (Lettau) V.J. Rico, van den Boom & Barrasa

Lichenised.

Substrate: siliceous rocks

Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) 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 species resembling C. commixta, but only known in the sterile state, with soralia-like areas on the surface and along the margins, intermixed with often crowded, detachable isidia-like structures with a pycnidium enclosed in the apex; on siliceous rocks, mostly on boulders in streams; more common in the mountains of SW Europe, rare elsewhere; obviously rare in the Alps.