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Corolla mauve or greenish, striped with purplish-chestnut; standard 7–11 × 8–12 mm, ± round, emarginate at the apex, slightly cordate at the base and with 2 vertical folds, silky brown pubescent outside, the claw 2–4 mm long, glabrous; wing-blades 6–9 × 2–4 mm, slightly auriculate at the base, silky near tip, with glabrous claw 3–5 mm long; blades of keel petals 6–10 × 3.5–4.5 mm, silky pubescent outside with auricle 1–1.5 mm long and glabrous claw 4 mm long.
Ovary 7 mm long, 4–6-ovuled, silky pubescent, with stipe 1 mm long; style curved through 90° near the base, glabrous save at the base; stigma capitate; pod 5–10 × 1–1.9 cm, ± oblong-linear, silky pubescent.
Inflorescences terminal and axillary, pseudoracemose, 25–30 cm long, brown pubescent; cymule rachides up to 5 mm long; pedicels 1–2 mm long; bracteoles up to 3.5 mm long, oblong.
Calyx appressed brown pubescent; tube 3–4 mm long, the 3 lower teeth 1.5 mm long, triangular; upper pair shorter, almost completely united.
Stamen sheath 7–10 mm long with free parts of filaments 2–3 mm long; upper stamen free at the base, curved; anthers 0.5–0.8 mm long.
Climber to several metres high; stems dark brown pubescent but becoming glabrous.
Seeds brown, 11–13 × 9–10 × 4.5 mm, oblong or subrhombic in outline.
Disk absent.
