The leaves of Pumpkin ash are glossy green, up to 40 cm (15.7 in) long, odd-pinnate with 5-9 leaflets. The single leaves are ovate and pointed. The leaf margin is serrated.
The whitish-green bloom conditions are formed as lateral panicles, which sprout just before the leaves.
The paired samaras are about 8 cm (3.2 in) long.
The branches are gray-brown with distinct leaf scars. The buds are almost black.