Scandent watery-stemmed herb. Glabrous leaves 50mm x 20mm with dentate margins, light green above, paler green beneath. Axillary few-flowered inflorescences to 50mm long subtended by small bracts, pinkish-white, 2 staminate tepals to 10mm long. 3 pistillate segments larger. 3-winged capsule to 15mm across.