Herbs, 1-3 m. Stems twining, slender, densely pubescent or glabrous. Leaves pinnately 3-foliolate; stipules lanceolate; petiole 2-4 cm; stipels small, linear; terminal leaflet elliptic to almost rhomboid, 1.5-6 cm, base rounded, apex slightly emarginate, with short mucro; lateral leaflets elliptic and slightly oblique, 2.5-5 × 1.5-4 cm, both surfaces pubescent, base rounded, apex emarginate, with small mucro. Raceme axillary, flowers clustered at base; peduncle 2.5-10 cm; bracts lanceolate; bracteoles lanceolate, persistent. Calyx tubular, lobes shorter than tube. Corolla purple to light purple, ca. 8 mm; standard obovate-elliptic, with stipe; wings and keels oblong, curved, all auriculate. Ovary hairy. Legume linear, 2-4.5 × 0.3-0.5 cm, compressed, slightly curved, 3-8-seeded. Fl. Nov-Jan, fr. Jan-Apr.
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