Sparingly branched, prostrate creeping suffrutex. Stems 4-angled, striate-ribbed, up to 1 m long. Leaflets linear-lanceolate or lanceolate, rarely complicate, 50-80 x 4-10 mm, mucrons absent, glabrescent on both sides; petiole 10-25(-30) mm long; stipules ovate-lanceolate, 2-3 x 1-2 mm. Flowers in axillary umbellate racemes, peduncles shorter than petioles, without warts, 6-15 mm long, often 1-flowered or with 2 to 4 flowers; flowers (4-)6-8 mm long; bracts linear, 2-3 x 0.2-0.5 mm; bracteoles linear-lanceolate, ±2 x ±0.5 mm. Calyx thinly pubescent, much shorter than the corolla, with equal lips, upper lip 2.0-2.5 mm long, lower lip 2.0-2.5 mm long, carinal lobe length equal to lateral ones. Corolla purplish pink; standard reflexed, suborbiculate, purple at the tip, 4-6 x 4-6 mm, claw 1-2 mm long; wings obovate, 3-5 x 1.0-1.5 mm, claw 3-4 mm long; keel almost equal to the wings, 3-5 x 2.0-2.5 mm, with a linear claw 3-4 mm long. Ovary narrowly oblong, 1 or 2-ovuled, 3-4 mm long. Fruit straight to slightly falcate, 20-30 x 4-5 mm, glabrescent, without warts along the margins, 2 to 4-seeded. Seeds almost round, black or brown.
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Very like D. angustifolius, but style broader and legumes more obtuse. Style slender, subterete, slightly dorsiventrally compressed, weakly channelled down inner face, and there bearded, base swollen. Distinguished from D. angustissimus by difference in habit and in length of anticous calyx lobe. Leaves of D. angustissimus mostly narrower in relation to length and often with more ovules in ovary.
Perennial herb, up to 0.5 m high; twining, sparsely branched. Leaves trifoliolate; leaflets linear or narrowly ovate, those of lower leaves often broadly ovate, not complicate, 32-77 x 10-20 mm. Flowers: corolla bright pink or mauve; Nov.-Jan. Pods > 6 mm broad, blunt.
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