Straggling shrublet. Stems slender, twining, 0.5 m long, not striate-ribbed. Leaflets narrowly or broadly hastate, or oblong, 13-25 x 5-7 mm, mucrons absent, scabrous on both sides; petiole (5-)8-10 mm long; stipules lanceolate, 2-3 x 1-2 mm. Flowers in leaf-opposed or pseudo-umbellate racemes, peduncles longer than petioles, without warts, (25-)34-90 mm long, with 2 to 6 flowers; flowers small, (3-)4-7 mm long; bracts lanceolate, 1.0-1.5 x 0.5-1.0 mm; bracteoles linear-lanceolate, ±1 x ±0.5 mm. Calyx pubescent, with equal lips, upper lip ±3 mm long, lower lip ±3 mm long; carinal lobe length equal to lateral ones. Corolla bright pink or pale mauve becoming purple with age; standard broadly obovate, 5-6 x 5-6 mm, claw ±1 mm long; wings obovate, 5-6 x 1-2 mm, claw 2-3 mm long; keel more or less equal to wings, 4-5 x 2-3 mm, claw 2-3 mm long. Ovary narrowly oblong, 2 or 3-ovuled, 4-5 mm long. Fruit linear, straight, 25-35 x 4-6 mm, densely silky, not warty along the margins, 2 or 3-seeded. Seeds brown or black.
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Perennial, occasionally annual, straggling shrublet, 0.3-0.5 m high; stems long, slender, scabro-hispidulous. Leaflets thickish, veinless, with scabrous margins; lowermost ones hastate-ovate and uppermost hastate-linear. Inflorescences subumbellate, 3-6-flowered; peduncles longer than leaves. Flowers bright pink or mauve. Calyx: lobes short and broad, ciliolate. Style channelled, flattened, bearded on upper side. Flowering time Oct.-May. Pod ± straight, glabrous, 2-or 3-seeded.