Annual or short-lived perennial, up to c. 1.5 m tall; stems pilose or shortly pubescent with spreading hairs. Leaflets 3, narrowly obovate to suborbicular, up to 25–50 x 17–44 mm, glabrous above, subglabrous to thinly pilose beneath; petiole up to 30–80 mm long. Stipules filiform. Racemes lax. Calyx deflexed against the pedicel, 7–11 mm long. Standard elliptic, yellow and purplish veined; keel bent at right-angles in the lower half, 8–11.5 mm long, with a straight untwisted beak. Pod 30–45 x 8–12 mm, sessile, spreading pilose, c. 40–50-seeded.
