Herbaceous rhizomatous perennial with erect or clambering angled pubescent stems to 800mm. Pinnate leaves with 4-10 paired leathery leaflets to 100mm x 10mm with terminal tendrils. Axillary racemes of 2-8 flowers to 16mm long, calyx to 8mm long with 5 teeth, pale lavender to pinkish-violet corolla, paler wings, keel white with recurved tip. Glabrous pod to 60mm x 6mm.