Herbaceous twiner with glabrous stems becoming corky with age. Glabrous leaves to 70mm x 40mm. Racemes of 25 flowers, deep brown-violet flowers 10mm diameter, calyx lobe to 3.8mm x 3.6mm, red-brown corolla with tube to 3mm long & lobes to 5mm x 3.5mm, 5-lobed corona with lobes to 3.1mm x 1.2mm.Glabrous follicles to 95mm x 30mm.