Prostrate or ascending annual or short-lived perennial varying greatly in its indumentum, which may be sparse and appressed or dense and spreading.. Leaf-rhachis up to 7 cm. long, including a petiole which may be up to 2.5 cm. in the lower leaves but is shorter in later leaves, prolonged 2–8 mm. beyond the lateral leaflets; stipules linear-subulate, up to 8 mm. long, not above 0.5 mm. wide at the base; leaflets 5–13 or, in seedlings, 1–3, narrowly oblong, oblanceolate or broadly linear, up to 4 cm. long and 7 mm. wide, glabrous above, appressed silky beneath.. Flowers pale pinkish-purple, 2–6 together in the leaf-axils; pedicel 2–4 mm. long, shortly hispid.. Calyx more or less hispid; tube 1–1.5 mm. long; lobes triangular-acuminate with filiform tips, 2–5 mm. long.. Standard pubescent outside, 5–8 mm. long; keel glabrous, the claw more than half as long as the blade.. Upper filament lightly attached, widened but not callous one-third above the base; filament-sheath 3–5 mm., free parts 1–2 mm., anthers ± 0.5 mm. long.. Style 1.5–2.5 mm. long, ribbon-shaped, glabrous, up to 0.3 mm. wide, with a few short hairs at the tip.. Pod curved, up to 4.5 cm. long, about 4 mm. wide, pubescent.. Seeds 5–10, mottled, often corrugated, rounded-oblong, longitudinal, ± 2.7 × 1.8 × 1.0 mm.; hilum almost central; aril minute.
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