Shrubby, up to 1–2 m tall, or a slender-stemmed straggling or trailing perennial herb; branches variously pubescent. Leaves 3-foliolate; leaflets 1–4 × 0.3–1.8 cm, narrowly elliptic-oblong to elliptic, oblanceolate or obovate, sometimes slightly inrolled at the margins, subglabrous to pubescent beneath; petiole 0.5–16 mm long; stipules 1–4 mm long, subulate to triangular-lanceolate, recurved. Racemes on main and usually numerous relatively short lateral branches (which often bear smaller leaves), few-flowered or the flowers solitary; bracts up to 2.5 mm long, linear to linear-lanceolate; bracteoles inserted on the pedicel, small and filiform. Calyx 7–9(11) mm long, glabrous to pubescent; lobes narrowly attenuate-triangular, ± twice as long as the tube. Standard subcircular, yellow, sometimes with darker lines or tinged reddish, glabrous outside except sometimes along the midvein; wings longer than the keel; keel 7–10 mm long, rather strongly rounded and crested behind the short beak. Pod 2–3 cm long, shortly stipitate, subcylindrical, pubescent, 8–12-seeded. Seeds c. 3.5 mm long, oblique-cordiform, smooth, ochre.