This glossy, bright green legume is rather strange looking, averaging from six to nine inches long, with four rather equally spaced, rippled fins (or wings) along the length of each bean pod, hence the origin of is Wing Bean name. Not a very dense or heavy bean pod and fairly square in its natural construction, wing beans tend to be bigger than the common string-bean. With more meat and starch than common string beans, the wing bean flavor is similar but less pungent and more bland overall.
With the best qualities of both the green snap bean and the pea, the wing bean reveals in its taste the flavorful nature of bean sprouts, soy beans, mushrooms, spinach and potatoes. In light of this collection of vegetable virtues agricultural scientists have labeled wing bean a "supermarket on a stalk" and praised it widely.