Perennial climber to 5m with glabrous stems. 5-7 lobed glabrous leaves to 140mm x 170mm with serrate margins with bracts to 4mm, simple tendrils. 1-2 male flowers, calyx lobes to 6.5mm long, brownish-yellow corolla to 40mm long with lobes to 25mm, solitary female flowers like males. Fruit to 140mm x 20mm.