Inflorescences axillary with flowers congested at the apex; peduncles 2–3(4) cm long; pedicels 1–2 mm long; bracts 5–6 × 2 mm, ovate-lanceolate, cuspidate-acuminate.
Calyx densely ferruginous-pilose; tube 3 mm long; lobes 4–6 mm long, narrowly triangular-subulate, the lowest the longest.
Standard yellow with dark red or purple striations, 10–13 × 6–8 cm, obovate, glabrous.
Climber; stems slender, densely covered with pale spreading ferruginous hairs.
Young fruits densely silky hairy but adult pods and seeds not seen.