#genus_Pistia  1 species: water lettuce
  supertype:  #monocot_genus__monocotgenu__liliopsid_genus  genus of flowering plants having a single cotyledon (embryonic leaf) in the seed
  member of:  #family_Araceae
  member:  #pistia__water_lettuce__waterlettuce__water_cabbage__watercabbage__Pistia_stratiotes__Pistia_stratoites  pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes

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