European Frogbit
European frogbit has rapid vegetative spread and forms dense mats, which can limit light penetration and inhibit recreational use.
Common Name: European frogbit
Scientific Name: Hydrocharis morsus-ranae
Native Range: Europe
Background
European frogbit (Hydrocharis morsus-ranae) is a free-floating, annual plant. The heart-shaped leaves are leathery and round with undersides that may be dark purple. The white, three-petaled flowers have yellow centers and bloom in summer. The veins follow the heart-shape of the leaf, and the roots form a tangled mat below the water’s surface. The leaf stem of European frogbit lacks a midline groove, which distinguishes it from its native look-alike American frogbit (Limnobium spongia).
Habitat
This plant grows well in quiet, open water including marshes, ditches, swamps, and sheltered coves.
NYS Distribution Map
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Identification
Small, heart-shaped floating leaves and three-petaled, white flowers. The stems of multiple plants tend to tangle together.
Impact
European frogbit has rapid vegetative spread and forms dense mats, which can limit light penetration and inhibit recreational use.
Prevention and Control
Limited information exists about control techniques for this species. Hand pulling may be suitable to control individual plants or small infestations.
