Dioecious, medium-sized to large evergreen tree up to 50(–60) m tall; bole cylindrical, often contorted and bent, up to 110(–240) cm in diameter, with buttresses up to 3 m high, and clear of branches up to 21 m; bark 0.5–2 cm thick, greyish to orange-brown, detaching in more or less thick rectangular brown scales revealing orange bark in adult trees, with lenticels, slash strongly resinous, pinkish-red, fibrous; crown rather open structured. Leaves alternate, imparipinnate; stipules absent; rachis up to 40 cm long; leaflets 7–13, with stalks up to 4 cm long, ovate to oblong, 10–30 cm × 4–7 cm, rounded at base, acuminate at apex, entire, leathery. Inflorescence an axillary or terminal panicle up to 20 cm long; male inflorescence comprising up to 5 times more flowers than female one. Flowers unisexual, regular, 5-merous; sepals lanceolate, up to 5 mm long, hairy, greenish; petals spatulate, 5–6 mm long, hairy on both sides, whitish; disk consisting of 2-lobed nectaries; male flowers with 10 stamens and rudimentary pistil; female flowers with 10 staminodes and a superior, 5-celled ovary, style columnar, with headlike stigma. Fruit a capsule up to 5 cm × 3 cm, opening with 5 valves from the base, 5-seeded. Seeds enclosed by endocarp (‘pyrenes’), ovoid, extending into a wing 2–3 cm × 0.5 cm. |
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