Branches glabrous or slightly downy, pinnae 5–9 pair.

Leaflets obtuse, pale beneath, 8–10 pairs, 6–12 mm long.

Flowers in simple axillary racemes, 25–30 cm long, pedicels slender 2.5 cm.long, petals orbicular, yellow, the upper streaked with red, filaments densely wooly in the lower half.

Pod oblong, turgid, 3–5 cm long, seeds 2–4.

Distribution: Assam, Bengal, Chittagong, Myanmar, Ceylon, Malay Peninsula and Archipelago.