#family_Alismataceae__Alismataceae__water-plantain_family  perennial or annual aquatic or marsh plants
  supertype:  #monocot_family__monocotfamily__liliopsid_family__liliopsidfamily  family of flowering plants having a single cotyledon (embryonic leaf) in the seed
  member of:  #order_Naiadales
  member:  #genus_Alisma__Alisma  small genus of aquatic or semiaquatic plants
     member:  #water_plantain__waterplantain__Alisma_plantago-aquatica  marsh plant having clusters of small white or pinkish flowers and broad pointed or rounded leaves
  member:  #genus_Sagittaria__Sagittaria  genus of aquatic herbs of temperate and tropical regions having sagittate or hastate leaves and white scapose flowers

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