yup china berry.  very very fast growing tree, I have cut some staves in the past and found it very light weight and not good bow wood. I have heard rumor that if you get a giant one that has good heart wood, that it makes a decent bow.  might as well give it a try though. I cut a couple, but never used them. after seasoning, one  was so brittle I was able to break it in full sapling, stave form so i cut them up to burn