Erect, straggling-ascending or decumbent well-branched herb, up to 1–1.5 m tall; branches appressed puberulous. Leaves all 3-foliolate or sometimes uppermost 1-foliolate; leaflets mostly 5–15 × 0.8–4 cm, usually narrowly oblong-lanceolate above to elliptic lower down, sometimes all elliptic, often acuminate, puberulous beneath; petiole shorter than the leaflets; stipules mostly 2–4 mm long, subulate or filiform, sometimes caducous. Racemes 10–23(40) cm long, rather densely many-flowered; bracts mostly 4–8 mm long, subulate-caudate; bracteoles at the base of the calyx, 4–9 mm long, linear-caudate. Calyx 3.5–4.5 mm long, becoming basally truncate and deflexed against the pedicel, appressed pubescent; lobes narrowly acuminate-triangular, at least as long as the tube. Standard broadly elliptic, yellow, veined purple or reddish-brown; wings markedly shorter than the keel; keel 8–10 mm long, rounded about the middle, with a narrow incurved sharp beak. Pod shortly stipitate, 2.4–3 × 0.6–0.7 cm, narrowly cylindrical, densely pubescent, 20–26-seeded. Seeds 2.5–3 mm long, oblique-cordiform, smooth, yellow to orange.
