Lecania flavescens Lynge

Lichenised.
Substrate: siliceous rocks
Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a species with a yellowish-grey, verrucose to rimose-areolate thallus, finally convex apothecia with black, epruinose discs, an intensely violet epihymenium and 8-spored asci containing 1-septate ascospores; based on a type from Novaya Zemlya, where it was found on pure chalk; extremely rare, for the few records from Central and Southern Europe the colour of the epihymenium is given as red-brown, and the ascospores are reported as wider; of these, one record is from the Alps on schistose rocks.
Switzerland: Graubünden;