Possible Crustose Lichens on trunk of Turkey Oak

Possible Crustose Lichens on trunk of Turkey Oak

Observation - Possible Crustose Lichens on trunk of Turkey Oak - UK and Ireland. Description: Two possible crustose lichens - a pale apple green and a yellow green deep in the bark cracks

Two possible crustose lichens - a pale apple green and a yellow green deep in the bark cracks