صورة Pertusaria albescens (Huds.) M. Choisy & Werner

الوصف:

Habitat: A group of trees midst of grass patches, N orientation, medium humid place, half shaded, precipitations ~3.000 mm/year, average temperature 8-10 deg C, elevation 435 m (1.400 feet), alpine phytogeographical region. - Subtratum: on bark of Fraxinus excelsior at breast height. - Comment: No bitter taste, KC- on soralen, thus not P. amara.