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W2O!: European Frog-bit
Weeds Watch Out: European Frog-bit

European Frog-bit (Hydrocharis morsus-ranae)

  • Plant Characteristics
    • "Valentine Plant" -free-floating aquatic plant with leathery, heart-shaped leaves that are purplish red underneath
    • Leaf stem does not have a mid-line groove
    • Has a single three-petalled white flower
    • Inhabits quiet edges of rivers and lakes and open marshes
    • Forms dense layers of interlocking plants and dangling roots which can interfere with swimming, boating and fishing
    • Reproduces by overwintering vegetative buds (turions) and through runners

      European Frog-bit, Photograph by Robin Scribailo. Used by permission from www.maine.gov
      European Frog-bit, Photograph by Robin Scribailo. Used by permission from www.maine.gov

European Frog-bit Distribution, USGS, Non-Indigenous Aquatic Species
European Frog-bit Distribution, USGS, Non-Indigenous Aquatic Species

European Frogbit Look Alikes

Native Look Alike:  Spatterdock (Nuphar spp.)
Spatterdock Drawing, University of Florida, Center for Aquatic and Invasive Plants Line Drawing DVD Master.  Used with permission.
Spatterdock Drawing, University of Florida, Center for Aquatic and Invasive Plants Line Drawing DVD Master. Used with permission.
  • Plant Characteristics
    • Heart shaped leaves up to 16 inches long
    • Parallel or overlapping rounded lobes
    • Yellow flowers
    • Large mid-rib
    • Found in ponds or slow moving waters
Native Look Alike:  Water Lily (Nymphaea spp.)

Waterlilies, Kelly E. Somerlot, Onondaga County CCE
Waterlilies, Kelly E. Somerlot, Onondaga County CCE
Water Lily Drawing, University of Florida, Center for Aquatic and Invasive Plants Line Drawing DVD Master.  Used with permission.
Water Lily Drawing, University of Florida, Center for Aquatic and Invasive Plants Line Drawing DVD Master. Used with permission.
  • Plant Characteristics
    • Round leaves with pointed lobes, 6-8 inches in length
    • Many petalled white flowers float on water surface
    • Veins on leaf radiate out from where leaf and stem meet
    • Found on quiet waters