Warty, grey-green lichen

Warty, grey-green lichen

Observation - Warty, grey-green lichen - UK and Ireland. Description: Grey-green, warty, crustose lichen growing on fruit tree trunk. Several dark apothecia spots on each wart. Possibly Pertusaria pertusa.

Grey-green, warty, crustose lichen growing on fruit tree trunk. Several dark apothecia spots on each wart. Possibly Pertusaria pertusa.