The Le Puy green lentil is a small, mottled, slate-gray/green lentil of the Lens esculenta puyensis (or L. culinaris puyensis) variety. In the US, this type of lentils may be grown and sold as French green lentils or Puy lentils.
 
The term "Le Puy green lentil" is protected throughout the European Union (EU) under that governing body's Protected Designation of Origin (PDO), and in France as an appellation d'origine contrôlée (AOC).