Also called (and spelled) common frogbit.
Part of
family Hydrocharitaceae.
Native to 🇪🇺 Europe and part of Asia.
🗺 Map by county (🇺🇸 USA-48)
(color key).
Invasive > learn+quiz
Invasive > 🌐︎ global
Invasive > 🌐︎ various
Invasive > 🇨🇦 🇺🇸 Canada+USA
Invasive > report it!
Invasive > 🇺🇸 USA
Invasive > Michigan
prohibited in Michigan, incl. seeds, fragments and derivatives. 
Treatment methods and timing (40–45°N lat.)
treatment details (Michigan) (pages 3, 8, 9, 10 and 19)
Uses by native peoples
(Ethnobotany database)
On No-Planting List by Seneca Nation of Indians SNI. (page 62)
Video ↖ above or to left is of
Frogbit; Removing invasive species from West Michigan,
an interview about invasive species with Drew Rayner, Coordinator of the West Michigan CISMA, posted by Lindsay Hoffman, Fox17 News.
For full effect, select the video image,
then icons ⛶ fullscreen,
and ▶︎ Play.