Lianas. Branchlets yellow, trailing, glabrous, with dense prominent tiny lenticels. Leaves 7-13-foliolate; rachis 20-30 cm, including petiole 8-10 cm; leaflet blades oblanceolate to oblong, 9-12 × 2-3 cm, papery, glabrous, secondary veins 9-12 on each side of midvein, base broadly cuneate, apex caudate. Pseudoracemes axillary or cauliflorous, 12-15 cm, glabrescent; rachis nodes with 2 or 3 clustered flowers. Pedicel ca. 5 mm. Calyx ca. 4 × 5 mm; teeth obscure. Corolla unknown. Legume yellow, linear-oblong, ca. 20 × 4 cm, inflated, woody, glabrous, contracted between seeds, both ends rounded; sutures thickened. Seeds 2-4 per legume, dark brown, reniform, ca. 3 × 2.6 cm. Fl. Apr, fr. Aug-Nov.
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