cowpea: the pods are drooping, erect or obliquely spreading, the meat is swollen or firm, and there are many seeds, which are generally oblong, cylindrical or slightly kidney-shaped. Green beans: The pod is strip-shaped, slightly swollen, about 1-15 cm long and 1 cm wide, and hairless. The back and abdomen edges of the pod are stitched, and the tip has a pointed beak, which is straight or slightly curved, and the cross section is round or oblate.