Tree to 30 m; bole to 14 m, 60 cm diam., buttresses to 1.5 m. Bark rather rough, finely fissured, brown, 0.5 mm thick; inner bark 5 mm thick, yellow to whitish; sapwood white. Leafy twigs (6–)8–12 mm diam.; pith wide, sometimes housing ants. Young twigs, petioles, rachides, pseudogemmulae and leaflets, especially veins abaxially minutely stellate (4-armed) pubescent. Leaves to at least 35 cm and 7-jugate, pseudogemmulate; petiole to 18 cm, terete. Leaflets to 25(–35) by 10 cm, elliptic to suboblong, bases rounded, symmetrical, apices acuminate, costae up to 17 on each side; petiolules 5–9 mm. Thyrses to 45 cm, axillary, paniculiform, branched to third order; major proximal branches to 18 cm. Flowers apparently bisexual and ebracteate, sessile, with short pseudopedicel, scented. Calyx 3.5–4 mm long, c. 2.5–3 mm diam., tubular-urceolate, minutely stellate-pubescent without, glabrous within, margin obscurely lobed, almost praemorse. Petals 5 or 6, 11–12 mm long, white, narrowly spathulate, densely and minutely stellate-pubescent without, glabrous within, valvate, connate in most proximal 1/4 to 1/3. Staminal tube long simple villous without in band below lobes, glabrous within save a band of small ascendant simple hairs just below anthers, margin 5-or 6-lobed, lobes c. 2.5 mm long, ± bifid, glabrous; anthers 5 or 6, c. 2–2.5 mm long, minutely apiculate, alocellate, glabrous, sessile, basifixed in angle of lobes. Disk cupular, c. 1.5 mm tall, adnate to ovary, glabrous. Ovary c. 2.5 mm long, minutely pubescent ; style minutely pubescent in proximal 1/3 to 1/2; stylehead capitate. Capsule 5 cm, spherical, shortly stipitate, reddish tomentellous, 2-valved. Seeds 2, c. 3.5 cm diam., scutellar, sarcotestal.
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