#black_walnut__blackwalnut  American walnut having a very hard and thick woody shell
  supertype:  #walnut  nut of any of various walnut trees having a wrinkled two-lobed seed with a hard shell
  part of:  #black_walnut_tree__black_walnut__blackwalnut__black_hickory__blackhickory__Juglans_nigra  North American walnut tree with hard dark wood and edible nut

No statement uses or specializes #black_walnut; click here to add one.