LICHALP

Rhizocarpon atrovirellum (Nyl.) Zahlbr.

Syn.: Lecidea atrovirella Nyl.

Lichenised.

Substrate: siliceous rocks

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a species close to Rh. viridiatrum, differing in the smaller, submuriform ascospores (to 20 µm long) with a single transversal septum; on siliceous schists in SW Europe, with a few records from the Western Alps (France).