Lianas. Branches brownish when dry, sparsely rust-colored pubescent, scattered with brownish oblong to orbicular lenticels. Leaves 9-foliolate; rachis 35-50 cm, including petiole 10-12 cm; leaflet blades oblong to broadly oblong-ovate, 10-18 × 7-11 cm, thickly papery, both surfaces glabrous, midvein abaxially conspicuously raised and adaxially slightly impressed, secondary veins 6-8 on each side of midvein, base rounded, apex shortly and obtusely acuminate. Pseudopanicles axillary, ca. 20 cm, densely brownish pubescent, only basal part of rachis with few branches. Pedicel 3-5 mm, densely brownish pubescent. Flowers 1.5-1.7 cm. Calyx broadly campanulate, ca. 6 × 8 mm, densely brownish pubescent; teeth obscure. Corolla whitish, 1.5-1.7 cm; standard orbicular, without basal calluses. Ovary puberulent. Legume ligulate-oblong, 10-15 × 3-3.5 cm, glabrous, conspicuously veined, base narrowed, apex shortly acuminate; both sutures with a 5-8 mm wide wing. Seed 1 per legume, reniform, ca. 2.5 × 1.3 cm. Fl. Jan-Jul, fr. Nov-Dec.
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