Potentilla gracillis

Cinquefoil? Yellow Strawberry?
Okay, I'm pretty sure this is a cinquefoil of some sort. My best guess would be "Five Finger Cinquefoil" aka Potentilla gracilis, but the pictures of P. gracillia have much narrower leaves than the one I found. (Addendum: another book says that there is a great deal of variety in this species, so much so that there are dozens of subspecies, so I think this is in fact five-finger cinquefoil)