Link to Celtis laevigata:
Fruits of the sugarberry tree are indistinguishable from the fruits of the hackberry trees. Most of the fruit is a hard inedible seed, but the thin layer of pulp around the seed has a taste and a texture remarkably like a date. Sugarberry leaves are smaller and smoother than hackberry leaves.
This is an odd sugarberry tree indeed, here are a few odd branches that have the look of the larger-leaved hackberry tree.