#lettuce  leaves of any of various plants of Lactuca sativa
  supertype:  salad_green__saladgreen__salad_greens  greens suitable for eating uncooked as in salads
  part of:  garden_lettuce
  subtype:  butterhead_lettuce  lettuce with relatively soft leaves in a loose head; easily broken or bruised
     subtype:  buttercrunch  lettuce with delicate and relatively crunchy leaves
     subtype:  Bibb_lettuce  lettuce with relatively crisp leaves
     subtype:  Boston_lettuce  lettuce with relatively soft leaves
  subtype:  crisphead_lettuce__crispheadlettuce__iceberg_lettuce__iceberglettuce  lettuce with crisp tightly packed light-green leaves in a firm head
  subtype:  cos__co__cos_lettuce__coslettuce__romaine__romaine_lettuce__romainelettuce  lettuce with long dark-green leaves in a loosely packed elongated head
  subtype:  loose-leaf_lettuce__leaf_lettuce  lettuce with loosely curled leaves that do not form a compact head

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