Prostrate or weakly ascending perennial; hairs on stems white or yellowish. Leaf-rhachis up to 14 cm. long, including a petiole of 3–30 mm., prolonged up to 3 mm. beyond lateral leaflets; stipules narrowly triangular-attenuate, often reflexed, up to 12 mm. long; leaflets 5–19, narrowly elliptic-oblong, up to 5 cm. long and 1 cm. wide, rather attenuate at base, rounded and apiculate at tip, pubescent beneath, more sparsely so above; chief nerves 6–7 on each side, each one becoming very thin at the point on the margin where it fuses with the one above it. Pseudoracemes terminal, rather lax, usually shorter than the peduncle, flowers never in leaf-axils; pedicels up to 5 mm. long; bracts narrowly triangular-attenuate, rather persistent, up to 8 mm. long. Calyx white pubescent; tube ± 2 mm. long; teeth triangular-attenuate with subulate tips, the lowest ± 3.5 mm., lateral 1.5–3 mm., upper pair 1.5–2 mm. long, one-quarter united, connivent. Standard greenish and golden pubescent outside, purple within, 14–16 by 11 mm.; keel glabrous, purple, whitish below. Upper filament lightly attached, dilated 1 mm. above the base; filament-sheath 12–13 mm., free parts 2–3 mm., anthers 0.8 mm. long. Style pubescent, bent sharply up through 80° at the base, ± 4 mm. long. Pod 6–7.5 cm. long by 4–5 mm. wide, slightly upturned towards the tip, minutely pubescent; style-base straight, or nearly so; false septa oblique. Seeds 13–19, marbled, almost smooth, angular, longitudinal, more or less rhomboidal, ± 2.5 × 2.5 × 1.5 mm.; hilum one-third along the side, the aril minute, elliptical.
