Clambering spiny vine, low shrub or tree to 2.7m, glabrate prickly stems, axillary ramose panicles of white flowers, puberulent reddish calyx & corolla, flat smooth falcate unarmed reddish fruit to 40mm x 5mm, hooked spines, bipinnate leaves with 6-11 pairs of glabrous leaflets to 5mm x 1mm