An erect shrub up to about 2 m tall, copiously branched, with densely puberulous branches. Leaflets linear-subulate, 1-2.5 mm long, and ±0.5 mm thick, terete, acute, straight or slightly incurved, glabrous. Inflorescences unifloral, terminal on branchlets (internodes long and peduncle-like). Flowers rather small. Bract subulate, 0.5-0.7 mm long, dark, glabrous on the abaxial, puberulous on the adaxial side. Pedicel 0.3-1 mm, puberulous. Bracteoles subulate or tooth-like, 0.5-0.8 mm long. Calyx tube infundibular-campanulate, with sparse, short, adpressed hairs; lobes linear, 0.8-1.4 mm long, terete, subacute(-obtuse), green, subglabrous. Petals white or yellow, with darker shades on standard back. Standard circular or broadly ovate, 4.4-5.2 x 3.8-4.6 mm, apically slightly incurved and with a blunt 'tip', glabrous except on the base of back and front. Wing blades oblong or narrowly elliptic, 3.3-4.3 x 1.5-2 mm, glabrous. Keel 3.9-4.5 x 2.4-2.7 mm, glabrous, with ± straight upper margin. Pistil puberulous on upper half of ovary; ovules 4 or 5. Pods not seen.
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Erect shrub to 2 m. Leaves 3-foliolate, leaflets linear to awl-shaped, terete, straight or slightly incurved, glabrous. Flowers solitary, terminal on branch tips with long, peduncle-like internodes, yellow with darker shades on standard back, wings and keel glabrous, calyx hairy, lobes linear, terete, subglabrous.