Herbaceous twining vine with striate pubescent branchlets. Mucronate leaves to 200mm x 200mm, sparsely pubescent above & glabrous beneath. 3-7 flowered cymes with bracts to 6mm long & smaller bractlets. Purple flowers, sepals to 6.5mm x 4.2mm, violet-blue corolla, greenish within to 20mm long, hirsute outside.