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Leaves 3-foliolate; leaflets 2.6–9 × 0.7–2.6 cm, oblong-elliptic, the lateral leaflets slightly oblique, all leaflets with midvein not central, subacute or obtuse at the apex, apiculate, rounded at the base, appressed pubescent on both surfaces; petiole 2.2–6 cm long; rhachis 1–4 mm long; petiolules 2 mm long; stipules 4–8 × 2–3 mm, ovate, striate; stipels 2 mm long, filiform.
Standard greenish-cream tinged purple inside or greenish-yellow with purple-red blotch, 12–20 × 12–17 mm, broadly elliptic, emarginate at the apex, with 4–6 mm long linear appendages; wings 11–14 × 1–2 mm; keel 12–15 × 2–4 mm.
Flowers axillary, solitary, in pairs or in 3-flowered fascicles; pedicels 3–5 mm long, bracts 3–5 mm long, lanceolate, striate; bracteoles 2 mm long.
Calyx tube 2–4 mm long, sparsely spreading pubescent; lobes 2–4 mm long, triangular, spreading pubescent, the upper pair completely fused.
Trailing or twining herb up to 45 cm long, arising from a perennial woody rootstock.
Pods 5.8–8 cm × 5–6 mm, compressed, linear, glabrous, pale green; beak 1–3 mm long.
Seeds reddish-brown, up to 5 × 3 × 1 mm, compressed; aril poorly developed.
Ovary 5–6 mm long, linear, appressed pubescent.
Stems annual, spreading pubescent.
