Substrate: intermediate rocks (such as calciferous schists)
Altitudinal distribution: 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 of the C. ferruginea-group with a whitish-grey, rimose to areolate thallus and sessile, brownish-red apothecia recalling those of C. crenularia, but with larger ascospores; forms with blackening margins may be also confused with C. exsecuta; on stones and low outcrops of calciferous schists, often near streams; the type is from central Sweden and the species is widespread in Northern Europe; from the Alps there is so far a single record, which needs re-confirmation.
