Lichen on oak trunk

Lichen on oak trunk

Observation - Lichen on oak trunk - UK and Ireland. Description: Khaki coloured crustose lichen growing on oak trunk. Granular soredia. Dark red-brown, almost black, apothecia, some clustered together. C+ orange. Possibly Pyrrhospora quernea.

Khaki coloured crustose lichen growing on oak trunk. Granular soredia. Dark red-brown, almost black, apothecia, some clustered together. C+ orange. Possibly Pyrrhospora quernea.