Crustose lichen with spot soralia

Crustose lichen with spot soralia

Observation - Crustose lichen with spot soralia - UK and Ireland. Description: White crustose lichen growing near base of tree trunk on sheltered floor of old quarry. Almost regular array of spot soralia with white, bitter soredia. Possibly Pertusaria amara.

White crustose lichen growing near base of tree trunk on sheltered floor of old quarry. Almost regular array of spot soralia with white, bitter soredia. Possibly Pertusaria amara.