Perennial rhizomatous climbing vine to 3m, glabrous to sparsely hairy stems. Leaves to 122mm x 96mm. White flowers or with pale purplish longitudinal bands, axillary inflorescence with 1-4 flowers, 2 bracts to 4mm, calyx to 14mm x 3.5mm, 5 sepals, inner sepals to 15mm x 4mm, outer sepals to 11mm x 5mm, white corolla to 45mm x 5.9mm, rarely reddish-purple. Capsule 10mm diameter, mostly glabrous.