Invasive SpeciesEuropean frogbit

Hydrocharis morsus-ranae
NOT FOUND by LucRoy4
Not Yet Reviewed by Expert
Quality checked by Lucroy4
Peer reviewed by
Field Notes
Warm day (72F), sunny, variable breeze. Pond is surrounded by cattails, ferns, willows, and gray birch. Pond has a off smell although surrounding area is of cut grass smell
Supporting Evidence
Photo of my evidence.
The leaves are whorls of 3, curly and 1/2cm long while the frogbit has small kidney or hart shaped leaves. Leaves are not in clumps.
Photo of my evidence.
The frogbit has flowers with white petals and a yellow center. The mass of plant material we found contains no flowers.
Photo of my evidence.
Fruits can be seen in the summer on frogbit, the mass has no lobe-like formations.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Hydrocharis morsus-ranae
Common name:
European frogbit
Sampling method: 
Weed weasel
Photo of our sampling method.
Place Studied
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N 44.564800 °
W -69.665040 °
Observation Site Information
A photo of our study site.
Freshwater - In a pond or lake
Trip Information
Johnson Pond
Trip date: 
Fri, 2017-07-28 11:30
Town or city: 
Type of investigation: 
Species and Habitat Survey
Lower Kennebec
MIDAS Code: 
Habitat Observations
Species diversity: 
Evidence of vectors: 
Paved road
Water temperature: 
Dissolved oxygen: 


I notice you said you used a weed weasel for sampling. Do you have a photo of it? How did it work? Did you catch lots of plants?