Kentucky coffee-tree has very large, bipinnately compound leaves that grow to nearly 1m in length with many pairs of sharply pointed, egg-shaped 3-8cm x 1.5-4cm leaflets. It has spike-like flower heads 6-20cm long, open, and growning from the ends of the branches. Flowers are numerous, greenish-white, star-shaped, and covered with tiny soft hairs. The petals are 8-10mm long, oblong or inversely lance-shaped. Seed pods are oblong, flattened, 8-25cm long and 3-5cm wide, seeds are 10-15mm long, bean-shaped, thick and hard, and in a sticky pulp when fresh.