Rhizocarpon simillimum (Anzi) Lettau

Syn.: Buellia simillima Anzi, Catocarpus simillimus (Anzi) Arnold, Rhizocarpon atroalbum (Nyl.) Zahlbr., Rhizocarpon sublestum (Nyl.) Zahlbr.
Lichenised.
Substrate: siliceous rocks
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) 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 steeply inclined surfaces of siliceous, base-rich or slightly calciferous rocks in upland areas.
Austria: ?Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Switzerland: Valais; France: Haute-Alpes; Alpes-Maritimes; Haute-Savoie; Italy: Friuli; Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta;