I was on holiday recently and we have a huge tree covered in these mosses. There appeared to be three sorts.
The main seaweed like stuff that looks like oakmoss pictures that I can find on the web, a much finer one and a curly flatter sort on the wood.
These were on mainly plum and apple trees. I wondered if they were useful. I shall look them up anyway, but does anyone know more about oakmoss? Is it the only useful tree moss?
I brought some back anyway to play with.