#family_Hydrocharitaceae__Hydrocharitaceae__Hydrocharidaceae__family_Hydrocharidaceae__frogbit_family__frogbitfamily__frog's-bit_family  simple nearly stemless freshwater aquatic plants; widely distributed
  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_Hydrocharis__Hydrocharis  frogbit
     member:  frogbit__frog's-bit__Hydrocharis_morsus-ranae  European floating plant with roundish heart-shaped leaves and white flowers
  member:  genus_Hydrilla  1 species
     member:  hydrilla__Hydrilla_verticillata  submersed plant with whorled lanceolate leaves and solitary axillary flowers; Old World plant naturalized in southern United States and clogging Florida's waterways
  member:  genus_Limnobium__Limnobium  American frogbit
     member:  American_frogbit__Limnodium_spongia  American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches
  member:  genus_Elodea__Elodea__pondweed__ditchmoss__ditchmos  submerged freshwater perennials
     member:  waterweed  a weedy aquatic plant of genus Elodea
  member:  genus_Egeria__Egeria  small genus of dioecious tropical aquatic plants
  member:  genus_Vallisneria__Vallisneria  eelgrass; eel grass
     member:  tape_grass__eelgrass__wild_celery__Vallisneria_spiralis  submerged aquatic plant with ribbonlike leaves; Old World and Australia

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