Vigorous glabrous twiner, young stems purple, old stems with corky bark, mucronulate leaves to 150mm x 100mm. Axillary cymes of 100mm diameter solitary flowers pink with darker throat, glabrous coriaceous sepals, outer sepals to 15mm long in fruit, inner ones to 12mm long, corolla to 90mm long, round fruit capsule 25mm diameter, bulbous roots