Lecanora impudens Degel.

Syn.: Lecanora chloropolia auct. non (Erichsen) Almb., Lecanora maculata (Erichsen) Almb., Pertusaria farinacea H. Magn., Pertusaria maculata Erichsen non H. Magn.
Lichenised.
Substrate: bark
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 temperate species found on base-rich bark, especially on isolated Fraxinus in humid riparian woodlands; widespread throughout the Alps.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Burgenland; Germany: Oberbayern; Schwaben; Switzerland: Bern; Graubünden; Luzern; Schwyz; Vaud; Valais; France: Haute-Alpes; Alpes-Maritimes; Isère; Var; Italy: Friuli; Trentino Alto Adige; Slovenia: Alpine and Pre-Alpine Slovenia; Liechtenstein