I grabbed this from a planting in Charlestown at the foot of Bunker Hill (actually Breed's Hill) in Boston today. I didn't have my phone.
My best guess is this is a Siberian Elm leaf. It seems the right size and the teeth are even with no teeth on other teeth. The bark I remember was quite dark and had orangish patches kind of like a Japanese Zelkova tree plantings.
Any other ideas?
Lacebark Elm - Ulmus parvifolia - though the leaf you show looks a might bit large.
I'm pretty sure Ulmus pumila lacks anything remotely like exfoliation.
That has to be it. The ones I saw were only slightly exfoliated but they were pretty young trees compared to the ones I just googled which almost look like Sycamores with their bark.
Thanks! New tree for me. :)
Get an image of the whole tree to go with the little bits (for your records)....
