Tree to 40 m high. Trichomes simple, fasciculate, stellate, and scale-like. Leaves opposite or subopposite, imparipinnate or trifoliolate (occasional leaves, or rarely most of them, simple). Compound leaves 3–7-foliolate, 2.5–14 cm long; petiole and/or rachis often winged; leaflets sessile; laminae elliptic or broadly so to obovate or broadly spathulate, equilateral, 2–9 cm long, 1–5 cm wide, rounded or emarginate to obtuse. Simple leaves: petiole 0.2–1.5 cm long, not winged; lamina elliptic or broadly so to obovate, equilateral, 1.8–4.5 cm long, 1–3 cm wide, rounded or emarginate. Inflorescences 3–18 cm long. Flowers bisexual or at least a few male. Sepals c. 1 mm long. Petals 4–5 mm long, white, glabrous to appressed-pubescent abaxially, shortly pubescent in proximal ½ adaxially. Ovules 2 on each side of placental arms. Capsule 2.8–5 cm long, separating (or easily separable) into 5 distinct valves at maturity; exocarp muricate, glabrous or becoming so, with excrescences 1–2 mm long. Seeds 2 on each side of much-enlarged placental arms, 1.5–2.5 cm long, winged at both ends. Embryo with lateral hypocotyl.
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