Umbilicaria cinerascens (Arnold) Frey
Syn.: Gyrophora cinerascens Arnold
Lichenised.
Substrate: siliceous rocks
Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) to the nival belt (above the lower limit of perennial snow and glaciers)
Note: on steeply inclined, often north-facing surfaces of siliceous rocks, mostly in small colonies, with optimum above treeline; several records from Switzerland need confirmation.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Switzerland: Bern; Glarus; Graubünden; St. Gallen; Uri; Valais; France: Alpes-de-Haute-Provence; Haute-Alpes; Alpes-Maritimes; Isère; Savoie; Haute-Savoie; Italy: Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta;
