photo credits: Robert Roach
Panzner wetland 15 acres. "Plants of Pennsylvania" keys it to hamiltonianis (because of leaves over 8 cm) but that doesn't match photos and distributions I see at inat and elsewhere.
Perhaps a dozen 3m trees.
Really stood out from native rubus and dogwoods because of prominent leaves and fruits. Wooded area with scattered red maple and cherry and cottonwood and quaking aspen.