Glabrous tuberous twiner to 1.5m. Leaves to 100mm x 12mm. Few-flowered lax axillary or terminal cymes with minute glabrous bracts to 1mm long, glabrous sepals 1mm x 0.5mm, creamy-yellow, pale greenish, white flushed mauve or pale mauve flowers, 5-lobed white corolla 9mm diameter, corolla tube 0.5mm x 0.7mm with glabrous lobes to 11mm x 4mm. Reddish-brown follicles to 85mm x 5mm