Trees. Branchlets brown, terete, glabrous, lenticellate. Pinnae 1 pair; petiole 16-25 cm; petiolar gland orbicular, flat or concave; leaf rachis 20-22 cm; petiolules 5-7 mm; leaflets 3 or 4 pairs, obovate-oblong, 8-30 × 5-18 cm, both surfaces glandular hairy, more densely so abaxially, lateral veins 10-21 pairs, base slightly cordate, apex rounded or acute. Heads 20-50-flowered, arranged in panicles on old branches or stems. Calyx ca. 1.2 mm. Corolla ca. 2.2 mm. Filaments ca. 2 mm. Ovary ca. 1 mm. Legume brownish outside, orange-red inside, strap-shaped, 23-46 × 3.5-4 cm, dehiscent along both sutures; valves slightly contorted, leathery, conspicuously net-veined. Seeds 6-10, ovoid, compressed, ca. 2.5 × 1.7 × 0.7 cm; testa black. Fl. May, fr. Nov.
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