Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)
Note: a species with a thick, grey-white, verrucose thallus reacting K-, sessile, black, often confluent apothecia with plane to finally convex and immarginate disc, a dark greenish epithecium, a colourless hypothecium, 8-spored asci, and subellipsoid to spherical ascospores measuring 7-9 µm in diam.; a long-forgotten taxon of uncertain affinities, only known from the type collection, which would deserve further study.
