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Not sure if this is Exidia nigricans or Exidia glandulosa. The first photo and the last two photos show it alongside another type of Witch's Butter fungi, either Tremella aurantiaca or Tremella mesenterica. The second photo shows a nice side-by-side comparison with another member of the genus, Exidia crenata (recisa). In the last photo, you can also see the slightly bumpy texture of the fungus. It almost looks as if it has little goosebumps on its ruffles.
I found some on fallen branches and some on small, standing trees on dead twigs and branches. This part of the forest had a lot of old oak trees as well as some white pine, white birch, and beech.