Trees, to 20 m. Branchlets dark brown pubescent, becoming glabrescent; buds densely appressed black pubescent. Leaves imparipinnate, 26-41 cm; petiole 3-5 cm; rachis 10-20 cm, prolonged 0.8-1.8 cm below terminal leaflet, glabrous or glabrescent; leaflets 9-11; petiolule 3-5 mm, grooved, glabrous or sparsely pubescent; blades lanceolate, obovate-lanceolate, or oblong, 6.5-18 × 2.7-6.4 cm, young leaves dark brownish pubescent, becoming glabrescent, hairs short abaxially, base narrowly cuneate, apex acute; midvein impressed adaxially, lateral veins 9 or 10 pairs, raised abaxially. Panicles terminal; rachis densely appressed grayish brown pubescent. Legumes large, very fleshy, woody, spheroidal or oblong, 4.5-9 × ca. 4 cm, beak 6-8 mm, stipe absent or short; valves grayish brown, 6-10 mm, apex and base densely appressed yellowish brown pubescent, internally white, tinged reddish near seed, septum between seeds membranous. Seeds 1-3, reddish brown, elliptic, 2.5-3 × 1.7-2 cm, fragile; hilum 2-3 mm, slightly off-center.
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