Rhizocarpon geographicum (L.) DC. subsp. prospectans (Räsänen) D. Hawksw. & Sowter
Syn.: Rhizocarpon prospectans Räsänen, Rhizocarpon tinei (Tornab.) Runemark subsp. prospectans (Räsänen) Runemark
Lichenised. Poorly known taxon.
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 exposed surfaces of base-rich siliceous rocks. A western lichen in Europe, which needs further study.
Switzerland: Bern; Graubünden; Uri; Valais; France: Haute-Alpes; Alpes-Maritimes; Haute-Savoie; Italy: Lombardia;