Shrub up to 5 m high. Stipules linear-falcate, 8-10 mm, pubescent. Leaves with 6-11 pairs of leaflets; petiole ribbed, 1-2 cm, glabrous to puberulous; rachis 5-8 cm, ribbed, thinly pilose with a 2 mm long, clavate gland between the lowermost pair of leaflets and a spindle-shaped gland between the uppermost pair and often gland-like hairs between the other leaflets. Leaflets elliptic-oblong, 1.5-4.5 by 0.5-1.5 cm, upper surface glabrous, lower at first sparsely pilose along the margin, apex rounded, base rounded to acute; petiolules 1-2 mm. Racemes axillary, single or two together, 2-or 3-flowered; peduncle glabrous, 1.5-3 cm; bracts boat-shaped, glabrous, 1-2 mm; pedicels 10-22 mm long. Sepals ovate-orbicular, glabrous, unequal, 2 outer only 1/3 of the 3 inner, 4-11 mm long. Petals yellow (orange brown in dried specimens), broadly ovate, short clawed, glabrous, unequal, 1.5-2.5 cm long. Stamens 10: 3 with filaments glabrous, 3 mm long and anthers curved, c. 10 mm with a 2 mm crest, opening by a single apical pore; 7 smaller with very short filaments and anthers slightly smaller, straight and without a pronounced crest, opening by two apical pores. Ovary subsessile, sparsely puberulous; style glabrous; stigma inconspicuous. Pods strap-shaped on a slender stalk and with a persistent, more or less swollen hypanthium, flat, glabrous, 15-20 by 0.5-0.7 cm. Seeds 15-50, flattened, narrowly ovoid, c. 5 mm long.
Near water courses or on marshy soil, in secondary forests and in clearings, usually scattered or few together, at elevations up to 2,700 metres.
Can be grown by seedlings. Seeds needs soaking.
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