Placidium imbecillum (Breuss) Breuss
Syn.: Catapyrenium imbecillum Breuss
Lichenised.
Substrate: calciferous soil, living mosses
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 terricolous species known from the Alps and from several isolated stations in Southern Europe, with optimum near and above treeline.
Austria: Vorarlberg; Tirol; Kärnten; Steiermark; Oberösterreich; Switzerland: Graubünden; Ticino; Unterwalden; Slovenia: Alpine and Pre-Alpine Slovenia;
