It is more like a large shrub, it does not have a true center trunk, but it was loaded with berries. I looked it up and they were Mulberries!
They look like black berries, but with a stem. They are mildly sweet without big seeds like blackberries, and none of the tartness of blackberries.
The tree produces prolifically over a long period of time. There are many overripe berries on the ground but the branches are loaded with black (ripe) berries, red berries, and green (immature) berries. I have since found more mulberry trees, but they were in a forest and were not as prolific as this. It has full sun and is on a riverbank.
I picked about 1/2 gallon the day after I found this tree and made a cobbler and froze the rest. To freeze place them on a cookie sheet in a single layer. Then freeze and place into a zip top bag. That way they are individually frozen and you can use as many or as few as you like. Then yesterday I went back and picked 3 quarts worth. It sure is nice to be able to pick berries for free that you can not even buy at the store. I also took some cuttings from this tree which I am trying to root. The first one to root will be mine, the second has been promised too, but if the cuttings take I may have 20 more! The cuttings have been in a rooting medium for 2 weeks and only 2 have turned brown.
Here is a cobbler recipe that I modified from another web site.