Densely villous twining liana with 4-5 foliate pinnate leaves rarely 6 foliate terminal leaflet to 100mm x 40mm glabrous above white-hairy beneath, terminal racemes to 350mm long of 25mm fragrant violet flowers, violet villous calyx to 5mm long, violet corolla 20mm diameter with wings to 3mm long, standard 16mm x 8mm, fruit a legume 240mm x 25mm, brown-tomentose