Rhizocarpon oederi (Ach.) Körb.

Syn.: Lecidea oederi Ach., Lichen oederi Weber nom.illeg., Lichen koenigii Retz.
Lichenised.
Substrate: metal-rich siliceous rocks, 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: a mainly cool-temperate species with a wide but scattered distribution, found on metal-rich siliceous rocks, mostly at low elevations.
Austria: Tirol; Salzburg; Kärnten; Switzerland: Graubünden; Valais; France: Haute-Savoie; Italy: Friuli; Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta;