Sometimes glabrous climbing shrub with 6-ribbed stems. Mucronate serrate-dentate biternate leaves, leaves to 100mm x 60mm, terminal leaflet to 40mm x 20mm. White flowers in 100mm long 5-6 flowered thyrses with bracts & bracteoles, sepals to 3.5mm long, petals to 4mm x 1.5mm.