Lichen

Observation - Lichen. Description: grey foliate lichen with bright green/yellow edges to the leaves. Some leaves 3-4 mm across. Patches of the same lichen have small cup shape folicules with orang centres. Lichen is on the south facing side of the tree

grey foliate lichen with bright green/yellow edges to the "leaves". Some leaves 3-4 mm across.
Patches of the same lichen have small cup shape folicules with orang centres.
Lichen is on the south facing side of the tree