"...a gardener who knows his flowers and is ignorant of his weeds is like half a coin, a tail without a head." Sara B. Stein
The leaf looks like a geranium to me. Are those those spent flowers? If they're the actual flowers, then I dunno. But if they're spent flowers, I'd guess geranium maculatum, aka cranesbill. Pretty native wildflower that likes shade.
Those aren't spent flowers---they're in "full" bloom and never get any bigger. But I agree that the leaves are geranium-like.