Evernia on branch of Oak tree in North Wales

Evernia on branch of Oak tree in North Wales

Observation - Evernia on branch of Oak tree in North Wales - UK and Ireland. Description: This was lichen seen whilst walking through woodland near Llangollen,in North Wales.It was quite away from any roads or farmland , so in very clean air

This was lichen seen whilst walking through woodland near Llangollen,in North Wales.It was quite away from any roads or farmland , so in very "clean air"