Scrambling liane. Stems prickly, pubescent, glabrescent. Leaves: stipules not seen, caducous; petiole 3.5–7.5 cm long; rachis commonly recurved, 15–20 cm long, puberulous, glabrescent with prickles at base of pinnae; pinnae 6 pairs, sometimes 4; stipellae absent; leaflets 3–5 (–7) pairs, obovate to oblong or almost orbicular, commonly 16–20 mm long, 10–14 mm wide (8–25 × 6–16 mm, fide Cooper & Cooper 2004: 99), discolorous, glabrous above, minutely appressed-pubescent below. Racemes to 25 cm long in terminal panicles; pedicels 3–5 mm long; bracts not seen. Sepals elliptic, the lowest c. 6 mm long, the others c. 5 mm, velvety. Petals ovate, glabrous, the uppermost c. 7 mm long, the other four c. 6 mm long, yellow. Stamens c. 5 mm long, hairy in lower half; anthers c. 2.5 mm long. Pistil c. 7 mm long; ovary pubescent; style glabrous; stigma small, cup-like. Pod broadly elliptic, (2.5–) 4.5–5 cm long, 2–3 cm wide, broadly winged, red-brown. Seed 1 or 2, not seen.
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