Climbing shrub. Leaves to 245mm x 55mm, glabrous or sparsely pubescent on main vein above, pubescent beneath. Axillary cymes on old woody stems of 1-2 flowers, flowers with 1-2 bractlets to 5mm long, yellowish-white calyx tube with a purple stripe, tube to 35mm long, 3-lobed limb to 47mm long, lobes to 24mm long, throat 7mm diameter. 6-angled nearly glabrous capsule to 105mm x 25mm.