Slightly woody clambering to scandent shrub or vine to 3m, with ribbed glabrescent stems. Leaves scabrous above hairy beneath 60mm x 35mm. Axillary solitary flowers or lax zigzag cymes to 150mm long with bracteal leaves to 35mm long, flowerheads of 18-20 flowers, individual heads to 10mm x 6mm, white or pale violet corolla to 9mm long, ribbed pubescent achenes 2mm long with white hairs