Caloplaca lactea (A. Massal.) Zahlbr.

Syn.: Blastenia lactea (A. Massal.) Trevis., Callopisma luteoalbum (Turner) A. Massal. var. lacteum A. Massal., Gyalolechia lactea (A. Massal.) A. Massal., Placodium pyraceum (Ach.) Anzi var. lacteum (A. Massal.) A.L. Sm., Xanthocarpia lactea (A. Massal.) A. Massal.
Lichenised.
Substrate: calciferous rocks
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the nival belt (above the lower limit of perennial snow and glaciers)
Note: a mainly Mediterranean to temperate species, an early coloniser of small calcareous pebbles in open habitats (e.g. stony ground in dry grasslands); in the Alps it is more frequent in dry-warm areas.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Burgenland; Germany: Oberbayern; Schwaben; Switzerland: Graubünden; Luzern; Schwyz; Vaud; Valais; France: Alpes-de-Haute-Provence; Haute-Alpes; Alpes-Maritimes; Drôme; Isère; Savoie; Vaucluse; Var; Italy: Friuli; Veneto; Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta; Liguria; Slovenia: Alpine and Pre-Alpine Slovenia; Trnovsky Gozd;