My house has these two mystery trees and nobody I know can identify them. I am quite fond of them, since they look nice and provide fantastic shade:
They're deciduous, but never flower in spring. Not enough chill hours, perhaps? I live in zone 7b New Mexico, but the trees are positioned such that they catch a lot of winter sun (southwest side of the house, close to a thermal mass wall that soaks up heat).
Growth is extremely vigorous every year, and they grow large numbers of lateral branches, resulting in a lot of crossing and rubbing branches and an extremely dense canopy. Here's what the leaves look like:
Buds grow right out of main trunks all the time. New ones appear every year:
Their bark is gnarled and dark gray, in places almost black:
One is multi-trunked, and the other had a central trunk (with a lot of branches):
Any idea what they are?