Twining herb with sparsely yellow-brown pubescent stems. Leaves to 200mm x 65mm, glabrescent above, pubescent beneath. Axillary solitary flowers with bracteoles to 3mm x 2mm, yellow-green calyx, purple limb, tube yellow-green outside, purple inside to 20mm x 8mm opening to 18mm diameter at mouth, 3 lobes to 5mm x 25mm.