I have no idea what this is, no leaves or twigs to help with the ID. I picked it up from the tree service I deal with a while back. I know it's not a "good" hardwood since it's not real dense. It also splits real easy. It was a yard tree that was pretty large(18-20 inch diameter). My first thought is basswood but who knows!
Any ideas?
Any ideas?

I looked on the ground around it and seen nothing but oak and maple leaves which I know it's not. I wouldn't have missed big ole Catalpa leaves! Maybe the home owners already had them cleaned up.