A legume is a plant in the family Fabaceae (or Leguminosae), or a fruit of these plants. A legume fruit is a simple ry fruit that develops from a simple carpel and usually dehisces (opens along a seam) on two sides. A common name for this type of fruit is a "pod", although pod is also applied to a few other fruit types. Well-known legumes include alfalfa, clover, peas, beans, lentils, lupins, and peanuts. A peanut is not a nut in the botanical sense; a peanut is an indehiscent legume, that is, one whose pod does not split open on its own.