Climbing or trailing biennial, glabrate stems with slender prickles, unifoiolate or trifoliolate leaves, doubly serrate leaflets to 60mm long hirsute above & villous beneath, terminal & axillary corymbs with prickles, tomentose sepals to 12mm long, white staminate petals to 120mm long, pistilate petals to 8mm long, fruit 12mm x 10mm