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Leaves (2–3)4-foliolate; leaflets elliptic to obovate or oblanceolate, the terminal pair usually the largest, and leaflets of lower leaves often larger than those of the upper leaves, 5–26 × 2–18 mm, obtuse, rounded (rarely acute) and ± mucronulate at the apex, cuneate at the base, densely glandular-punctate, glabrous or pubescent on both surfaces, mostly ciliate when young; petiole 2–16 mm long; petiolules 0.5–1 mm long; stipules 4–9 mm long including the 0.5–2.5 mm long spur, 2–3 mm wide, ovate, ovate-lanceolate or oblong-elliptic, glabrous or pubescent, densely glandular-punctate.
Inflorescences 2–9 cm long; peduncle 7–35 mm long; bracts 5–10 × 2.5–4.5 mm, elliptic-obovate or elliptic, acute, punctate like the stipules, pubescent or glabrescent.
Fruits 10–18 mm long, of 3–7 articles; each article 2–3 × 2–2.5 mm, puberulous or glabrous, glandular or not, covered with plumose or glabrous bristles 0.5–4 mm long.
Standard yellow, orange or pink to purple, mostly flushed or veined with darker colour, 7–9 × 7–8 mm; keel green.
Seeds dark purple-brown, 1.8 × 1.4 × 0.8 mm, rounded reniform, slightly beaked beyond the small eccentric hilum.
Calyx glabrous save for base of lowest lobe; tube 2–2.5 mm long, lobes 1–2 mm long.
Prostrate or erect perennial herb with pubescent stems 3–50 cm long or tall.
