Arum esculentum.

Botanical name: 

ARUM ESCULENTUM, L. Eddoes, Tanniers. Cultivated in Carolina for the root, which is a common vegetable of topical climates all over the globe. These roots must be boiled in several waters, or roasted.

Medical Flora, or Manual of the Medical Botany of the United States of North America, Vol. 2, 1830, was written by C. S. Rafinesque.