Robust shrub up to 2 m tall, reseeder. Stems erect to spreading, stiff, single, branching from near base, rigid, greyish brown with white storied lenticels. Seasonal shoots densely pubescent with white hairs, greenish white, soon glabrescent, persisting as they age. Leaves (7)9-11-foliolate, distributed along the branches, congested, petiolate; leaflets 10-11 x 0.3-0.4 mm, linear lanceolate, crowded, terminal leaflet second longest or equal to the basal pair, basal pair longest, three uppermost digitately inserted; petioles 1-2 mm long, shorter than terminal leaflet; rachis 5-7 mm long, grooved; stipules 1-2 x 0.7-1 mm, persistent becoming woody, hairy, triangular, acuminate. Inflorescences axillary, borne in upper axils of seasonal shoots with or without terminal leaf extension, pseudo-capitate, congested, two, three or more flowers per axil, pedunculate, pedicellate; peduncles stout and rigid, 5-7 mm long; cupulum bilobed, hairy, lobes equally developed, one of the vexillar lobes variously bilabiate, glandular, narrowly triangular; pedicel 1-1.5 mm long. Flowers 11-13 mm long, dark mauve and white, scented. Calyx 7-8 mm long, tube 4-4.5 x 4 mm, sparsely pubescent; lobes unequally developed, longer than the tube, carinal lobe boat shaped, the rest acute. Standard petal 10-12 x 8-8.5 mm, broadly elliptic, dark mauve, swollen but not ridged at apex, auricles slightly swollen; claw 3-4 mm long. Wing petals 9-11 x 3-4 mm, white, comprised of 2-3 rows of 10-14 transcostal lamellae; claw 3-4 mm long. Keel 9-10 x 3-4 mm, white, apically suffused with dark violet-purple; claw 3-4 mm long. Androecium 10-11 mm long, tenth stamen lightly attached, fenestrate. Pistil 10 mm long, ovary 2 mm long, sparsely glandular near apex, style 5 mm long straight, then curved upwards, swollen at point of flexure, height of curvature 3-4 mm, stigma stipitate, penicillate. Fruits 4-5 x 2.5-3.0 mm, oblong. Seeds 2-4 x 2 mm, dark brown to black.
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