Tree to 30 m; bole to 60 cm diam. with buttresses to 2.5 m tall and 50 cm out. Bark smooth and lenticellate to cracking, reddish grey; inner bark pale yellow to red or brown mottled, weakly onion-scented; sapwood creamy yellow. Leafy twigs c. 5 mm diam., cicatrose; buds with tomentose fist-shaped young leaves. Leaves 25–55 cm long, 4-or 5-jugate with apical scar, one of the lateral leaflets often appearing terminal; petiole 10-13 cm, c. 3.5 mm diam., conspicuously swollen at base, drying rather blackish like the rachis and petiolules. Leaflets 15–20(–28) by 5–8(–17) cm, broadly elliptic-ovate or weakly obovate, coriaceous, glabrous, bases cuneate to obtuse, ± asymmetric, apices acuminate, costae (7–)9–11 on each side, prominent abaxially, sunken adaxially, venation brochidodrome, conspicuously scalariform; petiolules 0.5–1.2 cm, swollen. Thyrses to 23 cm, axillary (sometimes in axils of undeveloped leaves), axes finely adpressed fawn pubescent, branches to 16 cm; bracts 2–6 mm, lanceolate, fawn pubescent. Calyx c. 6 mm diam., with 3 or 4 lobes c. 4 mm long, ovate, acute, pubescent. Petals 5, c. 5–8 mm long, oblong, obtuse, attached to tube at base, finely pubescent without. Staminal tube pubescent within, margin subentire; anthers 10, c. 1 mm long, narrowly oblong, glabrous. Disk c. 1 mm tall, cupular, fleshy, densely pilose. Ovary (?) 5-locular. Capsule at least 2.5 cm diam. (Ridley), depressed-globose, sparsely pubescent near sutures, pink to purplish-brown. Seeds with bright red coat.
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