european hornbeam

so i found this tree, apparently a graft tree. anyone have info on why these are grafted or if this variety will respond well to bonsai? are they like j maples and dont survive well on their own roots?
just wondering if air layers are possible to make other trees and worth the effort. now to my main question if i were to chop at the graft the root stock would back bud and give me just a plain european hornbeam, and at this point in the season i will have to wait until next spring

pic one

pics



the base of the trunk looks pretty good its about 2-3 inches wide. any ideas or instructions on what i should do.

You tree is a named cultivar. It has to be clonally propagated to stay true to form. That is either by cutting or grafting or test tube.

If you prune it back hard it will revert to ordinary hornbeam below the graft.

Paul

thank you paul