#order_Naiadales__Naiadales__Alismales__order_Alismales  an order of aquatic monocotyledonous herbaceous plants
  supertype:  plant_order__plantorder  the order of plants
  member of:  class_Monocotyledones
  member:  family_Naiadaceae__Naiadaceae__Najadaceae__family_Najadaceae__naiad_family__naiadfamily  monotypic family of aquatic plants having narrow leaves and small flowers
     member:  genus_Naias__Naias__Najas__genus_Najas  sole genus of the family Naiadaceae
        member:  naiad.aquatic_plant__water_nymph__waternymph  submerged aquatic plant having narrow leaves and small flowers; of fresh or brackish water
  member:  family_Alismataceae__Alismataceae__water-plantain_family  perennial or annual aquatic or marsh plants
     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
  member:  family_Hydrocharitaceae__Hydrocharitaceae__Hydrocharidaceae__family_Hydrocharidaceae__frogbit_family__frogbitfamily__frog's-bit_family  simple nearly stemless freshwater aquatic plants; widely distributed
     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
  member:  family_Potamogetonaceae__Potamogetonaceae__pondweed_family  plants that grow in ponds and slow streams; sometimes includes family Zosteraceae
     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
  member:  family_Scheuchzeriaceae__Scheuchzeriaceae__Juncaginaceae__family_Juncaginaceae__arrow-grass_family__arrowgrassfamily  a family of monocotyledonous bog herbs of order Naiadales
     member:  genus_Triglochin__Triglochin  perennial or annual bog or marsh plants; includes arrow grass
        member:  arrow_grass__arrowgras__Triglochin_maritima  tufted perennial found in shallow water or marshland; sometimes poisons livestock
  member:  family_Zannichelliaceae__Zannichelliaceae  alternative classification for some genera included in Potamogetonaceae; one species
     member:  genus_Zannichellia__Zannichellia  horned pondweed: completely submerged herbs; in some classifications included in Potamogetonaceae
  member:  family_Zosteraceae__Zosteraceae__eelgrass_family  used in some classifications: essentially equivalent to Potamogetonaceae

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