Tree to 33 m high. Trichomes simple, fasciculate, and stellate. Leaves alternate, impari-pinnate (occasional leaves paripinnate), (4–) 6–10-foliolate, 12.5–25 (–35) cm long, neither petiole nor rachis winged; petiolules of lateral leaves 4–10 mm long; terminal leaflet with petiolule 10–31 mm long; laminae ovate to elliptic, or narrowly so, or subfalcate, usually inequilateral, 5–15 cm long, 1.3–4.8 cm wide, acute to acuminate. Inflorescences 7–23 cm long. Flowers apparently exclusively bisexual. Sepals 1–1.2 mm long. Petals 3–3.2 mm long, creamy-yellow, sparsely appressed-pubescent abaxially, glabrous or with a few papillae adaxially. Ovules 3 on each side of placental arms. Capsule 9–12 cm long, separating (or easily separable) into 5 distinct valves at maturity; exocarp muricate, puberulous or becoming glabrous, with excrescences to 5 mm long. Seeds 3 on each side of much-enlarged placental arms, c. 5 cm long, winged at both ends. Embryo with lateral hypocotyl.
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