Physcia magnussonii Frey
Syn.: Physcia aipolia (Ehrh. ex Humb.) Fürnr. var. subincisa (Th. Fr.) Lynge, Physcia caesia (Hoffm.) Fürnr. var. albinea Anzi, Physcia stellaris (L.) Nyl. var. subincisa Th. Fr.
Lichenised.
Substrate: siliceous rocks
Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: on steeply inclined surfaces of base-rich siliceous rocks, often starting its development in fissures of the rock.
Austria: Tirol; Salzburg; Kärnten; Switzerland: Graubünden; Valais; France: Haute-Alpes; Alpes-Maritimes; Isère; Savoie; Italy: Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta;