nice little trunk...You will most likely regret the day you got this...It's a multiflora rose from the looks of it. It's also a beast that is gaining strength and growing thorns. I had one for a while many years ago. It had a beast of a trunk, dug up from a rural Va. cowpasture. It was GIVEN to me by a bonsai nursery because it was such a problem. Once of the necessities of keeping them is allowing them to grow wild for a few months to produce flowers and harden off branching. I spent all summer pruning the damn thing back to keep it from covering all the other trees near it. Pruning it was a challenge since it has catclaw thorns some of them small, others large. They are strong enough to tear clothing...Yours may be small enough not to be a nuisance, hope so...good luck.