#family_Potamogetonaceae__Potamogetonaceae__pondweed_family  plants that grow in ponds and slow streams; sometimes includes family Zosteraceae
  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:  pondweed  any of several submerged or floating freshwater perennial aquatic weeds belonging to the family Potamogetonaceae
  member:  genus_Potamogeton__Potamogeton  a large genus of aquatic herbs found in quiet waters in temperate regions; leaves usually float on the water
     member:  curleyleaf_pondweed__curled_pondweed__Potamogeton_crispus  European herb naturalized in the eastern United States and California
     member:  variously-leaved_pondweed__Potamogeton_gramineous  of Europe (except the Mediterranean area) and the northern United States
     member:  loddon_pondweed__Potamogeton_nodosus__Potamogeton_americanus  pondweed with floating leaves; of northern United States and Europe
  member:  genus_Groenlandia__Groenlandia  a monocotyledonous genus of the family Potamogetonaceae
     member:  frog's_lettuce  very similar to Potamogeton; of western Africa, Asia, and Europe
  member:  genus_Zostera__Zostera  (or in some classifications family Zosteraceae) small genus of widely distributed marine plants
     member:  eelgrass__grass_wrack__sea_wrack__seawrack__Zostera_marina  submerged marine plant with very long narrow leaves found in abundance along North Atlantic coasts

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