Source: Magness et al. 1971
Beans of several genera and species, and numerous varieties, are important food crops and are of some importance as feed crops in many countries. All are annuals, grown from seeds. The fruits are pods in which the seeds are contained. In green or snap beans, also termed 'string', pods are harvested before ripening, and both pods and the immature seeds are consumed, mainly as pot vegetables. In some kinds, the seeds when near full grown, but while still immature, are threshed from the pods and frozen or canned. In dry or field beans pods and seeds are allowed to ripen, then threshed and seeds only are consumed. Plants may be "bush," non-climbing and reaching a height of 15 to 30 inches; or "vine" or "pole," vining types reaching 10 or more feet in length.