Annual herbaceous twiner with densely pubescent twining stems, trifoliolate leaves villous both sides, axillary 150mm racemes of 15mm purple flowers, yellowish with red-brown lines on the back, yellow keel & wings, glabrous calyx, standard 15mm x 10mm, wings to 7mm, keel 10mm across, black-brown hairy pod to 75mm long x 8mm, furrowed branches