Weeds Watch Out: European Frog-bit


European Frog-bit (Hydrocharis morsus-ranae)

Frogbit. Robert Johnson, Cornell University.  Ruthanna Hawkins, Cayuga Lake Watershed Network.  Used with permission.
Frogbit. Robert Johnson, Cornell University. Ruthanna Hawkins, Cayuga Lake Watershed Network. Used with permission.
Frogbit Drawing, University of Florida, Center for Aquatic and Invasive Plants Line Drawing DVD Master.  Used with permission.
Frogbit Drawing, University of Florida, Center for Aquatic and Invasive Plants Line Drawing DVD Master. Used with permission.
  • Plant Characteristics

    • Free-floating aquatic plant with leathery, heart-shaped leaves that are purplish red underneath

    • Broad arching lateral veins with 75-90 degree angles from mid-rib

    • Leaves measure a half inch to 2 1/4 inches in length and width (can look like a miniature water lily)

    • 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

      Frogbit in Sterling Creek
      European Frog-bit in Sterling Creek, Cayuga County

    • Has been found in Oneida Lake and Sterling Creek in Cayuga County
European Frog-bit Distribution, USGS, Non-Indigenous Aquatic Species
European Frog-bit Distribution, USGS, Non-Indigenous Aquatic Species

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Page updated on September 8, 2005.