Derald wrote:
Jim Elbrecht wrote:

Looks like a tree, not a bush. There are no thorns. Berries are
tasty & look like blackberries. Leaves are like oak leaves.

Is this it? http://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=58

I have seen bushes grafted on the top of a tree trunk. I looks pretty
wierd but it works as decoration. Before following that like I thought
in terms of a thornless blackberry version grafted onto a mullberry
trunk.