Lichens

Observation - Lichens. Description: yellow crustose lichen with oak leaf shaped leaves. Not fully attached to the substrata as the edges of the leaves could be pealed away. Found on the horizontal surface of a brick wall

yellow crustose lichen with "oak leaf" shaped "leaves". Not fully attached to the substrata as the edges of the "leaves" could be pealed away.
Found on the horizontal surface of a brick wall