Learned MADBuck in college. Vibs were taught all together in spring ID. Cool.Well, are the branches & leaves opposite each other, or alternate? There are very few opposite leaved trees, and the majority of them are easily remembered by: MAD HORSE's VIBrating BLADDER.
Maple
Ash
Dogwood
HORSEchestnut
VIBernum
BLADDERnut
It's an elm, and like Daniel said, elm, even dead, is amazingly tough stuff.