Slender twining herb, up to 75 cm tall, branchlets strigose, pubescent; stipules minute, caducous; leaves 3-foliolate, up to 6 cm long; leaflets ovate- lanceolate, subcoriaceous, clothed with long, spreading hairs, terminal leaflet as long, lateral ones acute, margines entire; bracts linear, minute, caducous; racemes axillary up to 5 cm, pedicel short: calyx campanulate, teeth short, distinct, subequal, upper-2 not so long; corolla pink, little exserted, petals about equal, standard not spurred, narrowed into claw, wings oblong, keel incurved; stamens monadelphous (10), dimorphous, alternate, anthers small, abortive; ovary sessile, many ovuled; style short, curved, beardless, stigma capitate; pod linear, septate between the seeds, ending in a hook formed by persistent style, densely clothed with longer, more spreading hairs.