What is this? It is a large vine that covers my neighbor's 15-foot high arch over his driveway. I don't think he ever waters it, but it stays green all year, even in this drought. I think we had something that looked similar growing up the side of our house when we bought it two years ago. I cut it down and had to dig out the
roots several times before I finally smothered it with
cardboard and mulch. When I tore drywall out on the inside of that wall, I found pieces of the vine in the insulation. It seems to be totally bulletproof.