Hi, I need help identifying growth on near by trees (photos are in the attached doc file) The first 2 photos are from the London Plane tree. I was wondering what this growth is and if this growth is harmful to the tree or to the humans? The last 2 photo is of a growth on a maple tree. Could you help to identify what is growing on the bark of the maple tree? Is it harmful to humans? Is it killing the tree? Thank You. The images 27 and 15 are from London Plane, while images 42 and 45 are from the maple tree.
First is a moss, second is a lichen. Both are harmless, they're only using the trees as "parking space", not parasites at all. Harmless to people as well.
