Amphicarpa monoica.

Botanical name: 

AMPHICARPA MONOICA, Elliot. (Glycine do, L.) Pea Vine. Cattle are greedy of this plant, and destroy it almost everywhere, ought to be cultivated for fodder. The seeds are like peas, and as good to eat. In Carolina they begin to cultivate it for the table.

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