Decumbent, glabrous suffrutex, up to 0.4 m in height. Leaves phyllodinous, acicular, articulated near the middle; leaf density 2 to 10 per 10 mm length of stem; stipules absent. Inflorescences terminal, 40-260 mm long; rachis furrowed; flowers relatively numerous (up to 20 flowers per inflorescence), sparse (2 to 3 per 10 mm length of rachis), intermediate (8-15 mm long); pedicel 2-4 mm long. Bract lanceolate, acute, 1.8-3.0 mm long. Bracteoles triangular, acuminate, 1.0-1.3 mm long. Calyx 3.5-5.5 mm long, tube 2-3 mm long, lobes 1.0-2.5 mm long; subequally lobed but the upper lateral sinuses much wider than the medial sinus and the lower lateral sinuses; lobes deltoid, tips minutely pubescent inside. Standard widely ovate to orbicular, 6.0-15.5 x 5-14 mm; apex obtuse; claw 2.0-4.5 mm long. Wings oblong, invariably shorter than the keel, 6-18 x 2.5-6.0 mm, with 6-7 rows of sculpturing; apex obtuse; claws 2.0-4.4 mm long. Keel rostrate, not twisted, 8-19 x 3.5-7.0 mm, always with pockets; claws 2.0-5.5 mm long. Carpel subsessile; ovary 5-10 x 0.8-1.3 mm, linear; ovules few (7-9); style 4-9 mm long, curved upwards. Pods oblong, straight, invariably narrowly winged on the upper suture, up to 60 x±12 mm; stipe 2-4 mm long; dehiscent; flat; fruit wall thin, membranous. Seeds oblong-reniform, 3.0 x 2.4 mm, rugose, light pink to brown, mottled dark brown; hilum dark brown to black.
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Decumbent shrublet to 40 cm. Leaves simple, terete, articulated near centre. Flowers yellow, wings shorter than keel. Pods oblong, narrowly winged on upper suture, dehiscent, thin-walled.