as before - fungi or lichen?

as before - fungi or lichen?

Observation - as before - fungi or lichen?. Description: i've only found this once - i think it was on a mature silver birch tree on the edge of a larch/pine plantation in northern snowdonia.

i've only found this once - i think it was on a mature silver birch tree on the edge of a larch/pine plantation in northern snowdonia.