The asparagus bean (Vigna unguiculata subsp. sesquipedalis) is a legume cultivated for its edible green pods containing immature seeds, like the green bean. It is also known as the yardlong bean, long-podded cowpea, Chinese long bean, bodi/bora, snake bean, or pea bean. Despite the common name of “yardlong”, the pods are actually only about half a yard long, so the subspecies name sesquipedalis (one-and-a-half-foot-long; 1.5 feet (0.50 yd)) is a more accurate approximation.
A variety of the cowpea, the asparagus bean is grown primarily for its strikingly long (35 to 75 centimetres (1.15 to 2.46 ft)) immature green pods and has uses very similar to those of the green bean. This plant is in a different genus from the common bean. The many varieties are usually distinguished by the different colors of the mature seeds. It is a vigorous climbing annual vine. The plant is subtropical/tropical and most widely grown in the warmer parts of South Asia, Southeast Asia, and southern China.