Perennial twining vine with roots to 180mm thick, herbaceous twining glabrescent stems. Leaves to 250mm long, 3-9 foliolate, pubescent leaflets to 100mm long. Densely-flowered panicles or terminal clusters to 70 flowers, greenish-white to purple flowers, corolla greenish-white tinged rose-purple tinged magenta at apex, standard to 25mm long. Pods to 150mm x 10mm.