LICHALP

Fuscidea praeruptorum (Du Rietz & H. Magn.) V. Wirth & Vězda

Syn.: Lecidea praeruptorum Du Rietz & H. Magn.

Lichenised.

Substrate: siliceous rocks, bark

Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a species with a grey-green, areolate thallus (similar to F. arboricola) being white under UV-light and reacting C+ red, with a brown prothallus usually visible between the areolae and at the margins, the more central areolae with brownish-grey to greyish-green, often concave soralia, mostly remaining sterile; usually saxicolous on shaded rocks under overhangs, but also switching to the bark of various trees; widespread in the Holarctic region, with a boreal to temperate-montane pattern and a few scattered records from the Alps.