
Oak-loving Gymnopus - Gymnopus dryophilus
At first, I thought this was Rhodocollybia butyracea, but it wasn’t growing anywhere near pine. This forest does have a stand of conifers, but it was quite a distance from this spot.
The caps were flat with lined margins and were orangish brown with buff edges. Clavate, slightly greasy stipes that were whitish above and darker near the bases.
Habitat: They were growing among rotting wood in a deciduous forest.

"Gymnopus dryophilus" is a mushroom commonly found in temperate woodlands of Europe and North America. It is generally saprophytic, but occasionally also attacks living wood. It belongs to section "Levipedes" of the genus, being characterized by a smooth stem having no hairs at the base.