I cut these Elms this evening and can't stand not knowing exactly which sub-species it is.
I know from the corky wings that it's either "winged" or "rock" elm...but I can't figure out which is which

This first set of pictures is from a scrubby little tree I cut in the edge of a field (if that matters)
Both trees look a lot alike, but there is some subtle differences and I just can't lay a finger on it.
I've read that Elm varies greatly from tree to tree, so who knows...it may be the same stuff.
[attachment deleted by admin]