Found in Eastern Ohio. Not sure what type of tree it is, but there's lots of maple, oak, and black walnut around. There's also something dropping a cherry-like fruit (chokecherry?).
Here's a picture of the underside:
Edit: it wouldn't let me post the other picture, so I'll try doing it in a comment
In general it would look very yellow if it were A. mellea.
Kuo (mushroomexpert.com) describes gills as: "Running down the stem or nearly so; close; short-gills frequent; whitish, discoloring pinkish to brownish."
Here's an actual key: https://botit.botany.wisc.edu/toms_fungi/armkey.html which seems to give A. gemina.
Thanks for the info. I'm beginnng to realize how difficult this stuff can get, haha! Not sure how to tell if an annulus is wooly or a pileus is scaly. Looking at the pictures, A. gallica actually does look like the ones I saw. Idk though, maybe if I had a microscope and some more experience, I'd be able to tell better.
Anyway, thanks again for all your help! I've been learning a lot through this stuff.