circular close growing tree lichen
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
Melanelixia's are foliose lichens but the lichen in your photo is crustose .......
Melanelixia species are brown in colour, and as Jenny says, they are foliose, which means they have leaf like stuctures that are not closely attached to the bark. Crustose species, like you have here, are so closely attached to the bark that you can't really feel them if you rub your finger over them, and if you wanted to remove the lichen from the tree, you'd have to take the bark off too.
OPAL Community Scientist
Yorkshire and Humber
Lat/Lng: 54.0, -2.1
OS grid ref: SD9956