Your photo looks more like armillaria than lichens. Armillaria accompanied by other symptoms of distress indicates a tree in trouble. Look for cracked or peeling bark, sap leakage or dried amber.

Trees provide a home for animals and insects, shade for humans and absorb harmful carbon dioxide. The first steps in identifying a tree is to look at its shape, leaves, bark and if it produces ...

Remember to look at the three “Bs" — branches, bark and buds — for all of the information you need. ... A few trees, like the beech and some oak species, hold onto their leaves in the winter.

Your photo looks more like armillaria than lichens. Armillaria accompanied by other symptoms of distress indicates a tree in trouble. Look for cracked or peeling bark, sap leakage or dried amber.