I looked it up once, and there are two kinds, one native the other not. The native one is a little spindly in comparison, with smaller berries. It's the invader that goes wild and looks so lush. Maybe you don't have too many of them yet.
I only want one... and another invasive shrub/tree - staghorn sumac. They can't be any worse than the palnt I'm currently trying to exterminate. I haven't been able to identify it, but it has a tap root - when its chopped into pieces, it STILL grows new plants! GRRRRRRR