Parmotrema arnoldii (Du Rietz) Hale

Syn.: Parmelia arnoldii Du Rietz, Parmelia subarnoldii Abbayes
Lichenised.
Substrate: bark, lignum
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 cool-temperate to tropical lichen restricted to humid beech forests; it frequently grows in the upper branches of the tree canopy in forests with frequent fog, and therefore it often goes unnoticed.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Switzerland: Bern; Glarus; Graubünden; Luzern; Schwyz; Uri; Unterwalden; Italy: Friuli; Veneto; Slovenia: Alpine and Pre-Alpine Slovenia;