LICHALP

Cliostomum pallens (Kullh.) S. Ekman

Syn.: Bilimbia pallens Kullh.

Lichenised.

Substrate: 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 an esorediate thallus, pale yellow, minute biatorine apothecia, 3-septate, bacilliform ascospores, and inconspicuous pycnidia; on bark of broad-leaved and coniferous trees, widespread in the Holarctic region especially in the boreal zone, with a few records from the Alps.