Shrub up to c. 1 m. tall, with spreading grooved branches; branchlets plano-convex, finely grooved, 1-3 mm. wide. Lvs 1-3-5-foliolate; lflts ± pilose, 1-4 mm. long, obcordate. Racemes 1-4 per notch, 3-8-fld, on pubescent peduncles up to 5 mm. long. Fls 4-5 mm. long, on pubescent pedicels hardly 1 mm. long. Calyx 1·5-2 × 1·5-2 mm., campanulate, sparsely pubescent; teeth minute, obtuse to subacute. Standard white, with purple basal blotch and veins; wings white, purple-veined, auricles bluntly pointed; keel white, auricles small, rounded. Ovary ± pubescent. Pods 6-8-10 × 3-4 mm., slightly compressed, sparsely hairy when young, dark brown to black; beak stout, subulate, ± 1·5 mm. long. Seeds 2-6, palish- to olive-green, heavily black-mottled to completely black, ± 2 mm. diam.