Trees, insects and diseases of Canada's forests
Group 11
Elms
Leaves alternate, simple; edges toothed
Leaves shiny and smooth on the upper surface, with lateral veins rarely forked; fruits completely covered with hairs, wing not clearly distinct from the seedcase
Leaves dark green, upper surface very rough, paler beneath, hairy on both surfaces
Leaves rough on the upper surface, with 2-3 lateral veins forked at the base; fruit wings fringed with hairs, otherwise hairless
