Much branched undershrub, with firm, slender, soon glabrescent branches; leaves thinly clothed with adpressed, grey pubescence; stipules minute, setaceous; leaves 3-foliolate, leaflets elliptic-oblong or obovate, the end one stalked laterals opposite; flowers 6-12 in axillary short racemes; peduncles and pedicels very short; calyx white, canescent, teeth long, setaceous, linear; corolla purplish-red, twice as the calyx; standard ovate, keel straight, not rostrate, spurred on each side near the base; stamens diadelphous (9+1); pods deflexed, tetragonous, firm, glabrescent, valves obtusely keeled; 6-10 seeded.