LICHALP

Porpidia flavocruenta Fryday & Buschbom

Lichenised.

Substrate: siliceous rocks

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 resembling P. flavicunda, but with a usually yellow-orange thallus lacking lichen substances and larger apothecia recalling those of P. macrocarpa (but often pruinose), the exciple composed of thick radiating hyphae with the orange-brown inner part reacting K+ red; on siliceous boulders and low outcrops; widespread in Europe and also known from Alaska, with a few records from the Eastern Alps (Austria), mostly near treeline.