Bacidia fraxinea Lönnr.

Syn.: Bacidia fallax (Körb.) Lettau, Bacidia rubella (Hoffm.) A. Massal. var. fallax Körb.
Lichenised.
Substrate: 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, probably Mediterranean-Atlantic lichen found on deciduous trees, especially Acer, in open, humid woodlands, with a few scattered records from the Alps.
Austria: Niederösterreich (incl. Wien); France: Alpes-Maritimes; Savoie; Vaucluse; Var;