Robinia pseudoacacia
It is a very pretty wood, tight-grained, and finishes very well.
As John said, it is a physically hard wood, especially when dry (analogous to hickory - or "hick-crete" when it dries). Its wood is typical of and comparable to other woods of trees in the legume (pea) family as being dense and durable.
Rough-turn it soon after it is taken down, and you will be rewarded with fairly easy "second-turning" when it dries, and some beautiful figure.
I try to never "pass" on it when Robinia wood is offered to me (.....although I guess I can say that about most hardwoods!) - it's not all that common here, so it is a local "novelty" when one comes down.
Turn safely!
Rob