Glabrous vine to 1.5m. Leaves to 90mm x 50mm, glabrous above, sparsely puberulent or glabrous beneath. Solitary axillary flowers, creamish or greyish calyx mottled maroon or purple-brown, utricle to 7mm long, tube to 14mm long, 1-lobed limb to 22mm x 3mm. Fruit to 20mm x 16mm.