Size: tree, 50-70' average height at maturity
Buds: usually 2 pairs of exposed scales, brownish
Leaves: deciduous, opposite, 8-15", pinnately compound, around 7 leaflets, each leaflet 2-6" long, 1-3" wide, ovate to ovate-lanceolate, acute to acuminate tips, usually entire but may have serrations toward tip, petiolules .33-1" long, dark green on top, lighter beneath, yellow to deep purple and maroon in fall
Twigs: bundle scars crowded in u-shaped line, twigs usually stout, gray, leaf scars not raised, usually with a definite notch at the top
Flowers: essentially dioecious, apetalous, green to purple, appear before leaves
Fruit: 1-2" samara with 1 wing
Bark: gray or gray-brown, furrows and ridges forming narrow diamond shapes
