Erect shrub up to c. 2 m. tall, us. less; branchlets strict, erect to ascending, close-set, glab. or nearly so, finely grooved, much-compressed, ± plano-convex, (1)-2-(3) mm. wide. Lvs 3-5-foliolate, lflts up to 8 × 5 mm., obcordate to obovate, sparsely hairy. Infl. of (1)-2-(3) ascending racemes per notch, (3)-5-(7)-fld, on glab. peduncles up to 10 mm. long. Fls c. 4 × 3 mm., on glab. pedicels ± 2 mm. long. Calyx c. 1·5 × 1·5 mm., glab.; teeth minute, broad-triangular, acute. Standard white, purple-flushed, with basal dark purple blotch; keel greenish, auricles rounded; wings white, veins purple, auricles rounded. Ovary glab. Pods obliquely oblong, 9-11 × 4-6 mm., black, slightly compressed; beak stout, subulate, 1-2 mm. long. Seeds c. 4, orange-red, c. 2 mm. diam.