As I said, there are just too many sub-species of Elm and after you've cut enough trees you realize that it's just a waste of time trying to positively identify them, I have cut a lot of Elm. There are some species that are easily identified by looks, like Winged Elm for one but we don't get those up here.
It is relatively easy to chase a ring with Elm, as long as the rings are wide enough. When the rings get thin, and they can get pretty thin, it becomes a nightmare. I don't care for very thin ringed Elm especially when those rings are on the back. When I get Elm like that I will chase a ring till I get one at least 1/8" thick
I'll post some pictures of an Elm Warbow that I recently made that had that problem