Suffrutiose climber, branchlets slender, pubescent; leaves trifoliolate, leaflets rhomboid-obovate, coriaceous, base cuneate, apex acute-acuminate, dark green and rugose or puberulose above, yellow or brown pubescent beneath; stipules subulate, deciduous; bracts deciduous; flowers in axillary, panicled racemes; pedicel paired; calyx distinctly toothed; corolla yellow, standard orbicular, wings auricled, keel not beaked; stamens diadelphous (9+1), anthers uniform; ovary sessile, pubescent, style filiform, incurved glabrous, stigma capitate; pod oblong, straight, obliquely depressed between the seeds, shortly puberulous 3-6, rectangular-rounded, strophiole large.