Psorotichia diffracta (Nyl.) Forssell

Syn.: Collema diffractum Nyl., Collemopsis diffracta (Nyl.) Nyl. ex Lamy
Lichenised.
Substrate: calciferous rocks
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: on sun-exposed seepage tracks of calcareous rocks; overlooked, and perhaps more widespread in the Alps.
Austria: Kärnten; Switzerland: Bern; France: Alpes-de-Haute-Provence; Alpes-Maritimes; Vaucluse; Var;