Well we al speak of Elm, but we seem to forget that there are several Elm species, and not alike at all.
Amerikan Elm going by several more names like white elm etc.
Red Elm, AKA Slippery Elm, etc.
Rock Elm, AKA cork Elm
Siberian Elm, very often called Chinese Elm but not alike at al.
Chinese Elm.
and there are several more species, like Russian Elm.
I have turned the common Elm species, and a lot of Siberian Elm, as these are hardly affected by the Dutch Elm disease, and was/is available all the time in the area I lived then, S.W. Ontario.
Amerikan Elm.
Siberian Elm
Slippery Elm
Rock Elm
The Rock Elm is the hardest Elm, it also shrinks a lot more, see how much it is oval here in this picture.
Chinese Elm and Siberian Elm bark showing the big difference between them
