Erect or climbing annual to 1 m high; stems pubescent.
Leaves 3-foliolate; leaflets lanceolate to narrow-elliptic, 4–8 cm long, 1–3 cm wide, apex acute, ± sparsely pubescent; petiole 10–40 mm long; petiolules 2–12 mm long; stipules c. 5 mm long.
Racemes to 40 cm long; peduncle 20–30 cm long. Calyx 4–8 mm long. Corolla c. 10–15 mm long, crimson or pink, sometimes tinged green.
Pods linear, 8–10 cm long, c. 3 mm wide, softly pubescent; seeds c. 20, reniform, c. 4 mm long.