Perennial high-twining woody pubescent tuberous-rooted climber to 10m, stems with rough whitish bark. Pubescent leaves or glabrous above, to 200mm x 60mm. 1 to several-flowered axillary inflorescence with 8mm long bracts, Fragrant flowers with 60mm bluish-green or purple with white corolla tube, purple at base, yellowish-green coriaceous sepals, outer sepals to 10mm long, inner sepals to 14mm x 4mm, yellow corolla to 35mm long, white corolla tube to 18mm diameter, purple limb to 70mm across with 5 rounded lobes. Fruit a 2-celled capsule to 15mm long.