Substrate: acidic soil (mostly on siliceous substrata), lignum, bark
Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)
Note: a species with red apothecia and pycnidia, resembling C. polydactyla, but podetia more greenish grey and smaller (to 2 cm tall), scyphi narrower (rarely more than 2 mm wide), covered by farinose soredia, and marginal proliferations lacking or short, with squamatic acid and therefore UV+ white; on decaying wood and at the base of trunks of conifers as well as on acidic soil in humid-shaded situations; widespread in Western Europe and North America but not common, in the study area so far only known from the Western Alps.
