Slightly woody annual, 1–5 m tall; stem glabrous or almost so, rarely with a few small prickles. Leaf-rhachis up to 4(–13) cm, glabrous or almost so, sometimes with a few small prickles; leaflets 6–56, up to 12 x 4 mm, glabrous. Racemes 2–13-flowered; rhachis up to 16 cm long including a peduncle of up to 5 cm. Calyx c. 5–6 mm long; lobes c. 1 mm long. Blade of standard 11–12 x 12–14 mm; claw 4–5 mm long; appendages without free tips, abruptly rounded and somewhat emarginate at the top. Filament-sheath 12–13 mm long. Style pubescent, 3.5–5.5 mm long. Pod 8–24 x 0.35 cm, torulose, slightly curved, 20–30-seeded.