Annual climbing herb with glabrous stems to 3m. 3-5 lobed leaves to 50mm x 60mm. Solitary flowers or pseudo-racemes, greenish-yellow bilabiate glabrescent calyx with spur to 60mm, yellow-tipped & with green venation, yellow petals to 11mm x 10mm with 3-5 mucronate lobes, multilobed lower petals to 17mm x 13mm. Glabrous 3-parted fruit to 8mm.
Edible tubers