Psora vallesiaca (Schaer.) Timdal

Syn.: Lecidea albilabra auct., Lecidea deceptoria Nyl., Lecidea vallesiaca Schaer., Psora albilabra auct. non (Dufour) Körb., Psora deceptoria (Nyl.) Flagey, Psora subdecipiens (Nyl.) Flagey, Squamaria deceptoria (Nyl.) M. Choisy & Werner
Lichenised.
Substrate: calciferous rocks, calciferous soil
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: on bare soil and in fissures of rocks, not rare where suitable habitats are present (subcontinental conditions and base-rich, slightly calciferous siliceous substrata).
Austria: Tirol; Steiermark; Switzerland: Valais; France: Alpes-de-Haute-Provence; Alpes-Maritimes; Vaucluse; Var; Italy: Veneto; Piemonte; Valle d'Aosta; Liguria;