A perennial herb or subshrub. Stems ascending or erect, 10-20 dm long, striate, glabrous or appressed short-pubescent. Leaves trifoliolate, leaflets elliptic, ovate, or oblanceolate, 2.8-9.5 cm long, 1.2-4.5 cm wide, veins 6-12 on each side of midvein, upper surface glabrous or sparsely pubescent, lower surface appressed short-pubescent, apex rounded to acute, occasionally retuse, base cuneate or rounded, petioles 22-67 mm long, stipules absent or minute and narrowly triangular, ca. 1 mm long. Flowers 9-15 mm long, 22-75 in terminal, somewhat lax inflorescences, rachis 15-40 cm long (incl. peduncle), bracts linear-triangular, 3-4 mm long, ascending, caducous, bracteoles at base of calyx, narrowly triangular; calyx densely appressed short-pubescent, the tube 3-4 mm long, the lobes 3.5-4.5 mm long, lateral lobes distinct at apex; petals yellow with lines near base, standard 9-12 mm long, 7-9 mm wide, striate, wings oblong-obovate, 6-10 mm long, 2.8-3.8 mm wide, keel petals striate, with nontwisted prolonged beak, margins ciliate; elongated anthers 2.5-3.2 mm long, short ones 0.5-0.8 mm long. Pods brown at maturity, 3.5-3.8 cm long, stipitate, stipe less than 3 mm long, glabrous or sparsely appressed short-pubescent. Seeds ca. 36 per pod, brown, up to 2.8 mm long, smooth.

Vermifuge (leaf extract)

PROSEA (Plant Resources of South-East Asia) Foundation
Pacific Island Ecosystems at Risk (PIER)

Used to treat urinary problems and fever (plant); applied as a poultice to painful swelling of joints (roots)