Rhizocarpon disporum (Nägeli ex Hepp) Müll. Arg.

Syn.: Lecidea dispora Nägeli ex Hepp, Rhizocarpon confervoides sensu A. Massal., Rhizocarpon disporum (Nägeli ex Hepp) Müll. Arg. var. montagnei (Körb.) Zahlbr., Rhizocarpon montagnei Körb.
Lichenised.
Substrate: siliceous rocks
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a widespread, probably holarctic lichen of dry-continental areas, found on exposed surfaces of basic siliceous rocks; most frequent in dry-continental valleys of the Alps.
Austria: Tirol; Salzburg; Kärnten; Steiermark; Switzerland: Graubünden; Uri; Vaud; Valais; France: Alpes-de-Haute-Provence; Haute-Alpes; Alpes-Maritimes; Savoie; Haute-Savoie; Italy: Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta; Slovenia: Alpine and Pre-Alpine Slovenia;