Leguminosae Canavalia ensiformis (L.) DC.
Source: Magness et al. 1971
This bean is grown in Southern U.S. mainly for stock feed, but young pods can be used as snap beans. The plant is vining. Pods reach 10 to 14 inches in length, but are harvested at half that size for eating. Seeds are large, 1/2 to 3/4 inch long, and nearly as broad, and are sometimes used as coffee substitute. jack beans are not grown as a commercial food crop in this country.