Petractis clausa (Hoffm.) Kremp.

Petractis clausa (Hoffm.) Kremp.

Syn.: Gyalecta clausa (Hoffm.) A. Massal., Gyalecta exanthematica (Sm.) Fr., Lecidea exanthematica (Sm.) Nyl., Lichen clausus Hoffm., Petractis exanthematica (Sm.) Fr., Thelotrema clausum (Hoffm.) Schaer., Thelotrema exanthematicum (Sm.) Ach., Urceolaria exanthematica (Sm.) Ach.

Lichenised.

Substrate: calciferous rocks

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) 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: a temperate species found on compact calcareous rocks in humid-shaded situations, such as in gorges and woodlands, with optimum in the submediterranean belt; widespread throughout the Alps.

Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Switzerland: Bern; Graubünden; Luzern; Schwyz; Uri; Unterwalden; Vaud; Valais; France: Alpes-de-Haute-Provence; Haute-Alpes; Alpes-Maritimes; Drôme; Isère; Savoie; Haute-Savoie; Vaucluse; Var; Italy: Friuli; Veneto; Trentino Alto Adige; Lombardia; Piemonte; Liguria; Slovenia: Alpine and Pre-Alpine Slovenia; Trnovsky Gozd;

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