Siberian elm (Ulmus pumila)
Appearance: Deciduous tree, 30 - 60' high with an open rounded crown and slender, spreading branches. Bark is dark gray and shallowly furrowed on a mature tree. Silver-gray twigs have a zig-zag shape with a leaf bud at each turn.
Leaves: Alternate, small, (1- 2"), elliptic, toothed, short-pointed at the tip, slightly uneven at the base (much less than American elm).
Flowers: Greenish, lacking petals and occurring in small, compact, drooping clusters of 2 - 5, appear before leaves develop.
Fruit: Winged, round, and smooth, contains on seed; fruit hangs in clusters.