Right-twining vine, woody below with pubescent young stems. Leaves glabrous or with scattered hairs, blades to 125mm x 71mm. Extra-axillary racemes of 4-18 flowers with bracts to 2.6mm x 0.5mm, calyx tube to 1.2mm with lobes to 6.2mm x 2mm, glabrous or with a few hairs on margin & base, brown, green or purple corolla with glabrous or hairy tube to 2.7mm long, corolla with 5 lobes to 11.7mm x 4.7mm. Glabrous white or pale green follicles to 190mm x 70mm, sometimes irregularly winged with wings to 8mm wide.