I'm in the hackberry camp on this one, but in either case it's a fairly fast growing tree and regarded as kind of a weed tree. We have hackberries popping up like weeds all around our house.
Problem with them is that they're like potato chips - you can't have just one. Only in this case, you don't even have the option. Once you have one flowering sized tree, you'll have hundreds more soon following. Every. Single. Year.
Where are you,
@dbjmar? That may help with id. They have overlapping (if not the same) range, but one may be more prevalent than the other in certain areas - like in my area, hackberries seem to be more common (at least in my observation).
and it's a junk tree that seeds itself generously. You really don't want to let it grow right next to your house there. Even 20ft. away from the house would be too close.
