#family_Trapaceae__Trapaceae  family comprising solely the genus Trapa; in some classifications treated as a subfamily or tribe of the family Onagraceae
  supertype:  dicot_family__dicotfamily__magnoliopsid_family  family of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination
  member of:  order_Myrtales
  member:  genus_Trapa__Trapa  small genus of Eurasian aquatic perennial herbs: water chestnut
     member:  water_chestnut_plant__water_chestnut__waterchestnut__caltrop  a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits

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