Violet-toothed Polypore - Trichaptum biforme
Semi-circular fruiting bodies with whitish, brown, and green zones of color.
I think this could be Trichaptum biforme - and that it turned green from algae? Any input would be appreciated!
Habitat: Growing on rotting wood in a mixed forest
''Trichaptum biforme'' is a species of poroid fungus in the order Hymenochaetales. It is a saprobe that decomposes hardwood stumps and logs.