Decumbent, pubescent suffrutex, up to 0.3 m in height. Leaves phyllodinous, acicular, unarticulated; leaf density up to 1 per 10 mm length of stem; stipules present, 2.0-3.5 mm long. In-florescences terminal, 80-130 mm long; rachis ±furrowed; flowers few (up to 5 flowers per inflorescence), lax (up to 1 flower per 10 mm length of rachis), 5-8 mm long; pedicel 3-5 mm long. Bract narrowly lanceolate, acute, 2.0-3.5 mm long. Bracteoles narrowly lanceolate, acute, 2.0-3.5 mm long. Calyx 5.5-8.0 mm long, tube 2.5-3.5 mm long, lobes 2.5-4.5 mm long; subequally lobed but upper lateral sinuses much wider than medial and lower lateral sinuses; lobes deltoid, tips minutely pubescent inside. Standard ovate, 6.5-9.0 x 5-7 mm; apex emarginate; claw 2-3 mm long. Wings oblong to obovate, longer than keel, 6.5-9.5 x 5-8 mm, with 6-7 rows of sculpturing; apex ob-tuse; claws 3.5-4.0 mm long. Keel rostrate, twisted, 5.5-6.5 x 2.0-2.5 mm, always with pockets; claws 2.5-3.0 mm long. Carpel subsessile; ovary 3.5-4.0 x ±1 mm, linear; ovules many (15-18); style 5.0-5.5 mm long, curved upwards. Pods narrowly oblong, straight, flat, not narrowly winged on upper suture, up to 23-35 x 4.0-5.5 mm; stipe 1-2 mm long; dehiscent; fruit wall thin, membranous. Seeds broadly oblong-reniform, ±2.0 x 1.6-1.9 mm, rugose, black, mottled white; hilum black.
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Like L. uniflora but inflorescences few-flowered (up to 5 flowers) and flowers smaller (5-8 mm long).