Leptogium cyanescens (Ach.) Körb.

Syn.: Collema cyanescens (Ach.) Rabenh., Collema tremelloides Ach. f. cyanescens Ach. Leptogium caesium (Ach.) Vain., Leptogium tremelloides auct.
Lichenised.
Substrate: living mosses, siliceous rocks, , bark
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a mild-temperate to humid subtropical lichen found in humid, old, open forests, occasionally on rocks and epilithic mosses; most of the records are old.
Austria: Vorarlberg; Tirol; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Switzerland: Bern; Glarus; Graubünden; Ticino; Vaud; Valais; France: Alpes-de-Haute-Provence; Alpes-Maritimes; Isère; Vaucluse; Var; Italy: Friuli; Veneto; Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta; Slovenia: Alpine and Pre-Alpine Slovenia; Trnovsky Gozd;