Gunnera chilensis.

Botanical name: 

Gunnera chilensis Lam. Halorageae.

Chile. The acidulous leaf-stalks serve as a vegetable. The plant somewhat resembles rhubarb on a gigantic scale. The inhabitants, says Darwin, eat the stalks, which are subacid. The leaves are sometimes nearly eight feet in diameter, and the stalk is rather more than a yard high. It is called panke. In France, it is grown as an ornament.

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.