Also called large-flowered waterweed.  Part of family Hydrocharitaceae.

Native to South America.  Invasive > learn+quiz Invasive > Global Invasive > in USA+Canada Invasive > report it! Invasive > in USA Invasive > in Michigan prohibited in Michigan, incl. seeds, fragments and derivatives (.pdf)

Learn more about 🇧🇷 ♒︎ Brazilian water-weed Egeria densa

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