Syn.: Physcia orbicularis (Neck.) Poetsch f. rubropulchra Degel.
Lichenised.
Substrate: bark
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: a mainly mild-temperate epiphytic species, known from Eastern North America and West Asia, with a few relict stations in Europe.
