A fast-growing, upright, many-stemmed forb to 1 metre in height and occasionally more. Leaves reach 12 centimetres in length and consist of 6-10 pairs of narrow leaflets. The largest leaflets may reach 5 cm in length. Bright yellow flowers are carried in small clusters on stalks near the upper leaves. These are produced sequentially over a long flowering period and are followed by long (~5 cm), slightly curved pods which ripen to dark brown. Seeds are brown and irregular in shape. Owing to the long flowering period, flowers, unripe pods and ripe pods often occur concurrently.