High-climbing herbaceous or slightly woody twiner, puberulous stems becoming glabrate. Glabrous leaves to 120mm x 50mm. few-flowered fascicles, corymbs or cymes of flowers, pale purple or green tinged purple corolla pilose outside to 15mm long, petals to 15mm long, glabrous inside, 5-lobed corona.Follicle 5-ribbed longitudinally to 170mm long