Perennial twining herb, becoming woody below; stems thinly pubescent, glabrescent. Leaves alternate, pinnately trifoliolate, petiolate; stipules and stipellae present. Inflorescence an axillary raceme; bracts persistent; bracteoles more or less persistent. Calyx 5-toothed; teeth broad, shorter than tube; petals clawed; standard longer than wings and keel; stamens diadelphous, upper one free, lower 9 united in an open sheath around ovary; anthers uniform; ovary linear, ovules several, style dilated at base, channelled, bearded along upper margin, strongly curved in the same direction near base and apex, gently curved in opposite direction in the middle; stigma terminal, capitate. Pod attenuate at ends; seeds 3–6, arillate.
1 species only, native to South Africa; widely cultivated around the world; cultivated and naturalised in Australia.