LICHALP

Calicium denigratum (Vain.) Tibell

Syn.: Calicium curtum Turner & Borrer ex Sm. var. denigratum Vain.

Lichenised.

Substrate: bark, lignum

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: similar to C. abietinum in the endoxylic thallus and the epruinose apothecia, but with more slender stalks, ascospores with a length-width ratio <2, and a coarsely areolate sculpture; on decorticated stumps and snags in montane coniferous forests; widespread also in the Alps, but not very common.