Also called parrot's-feather.  Part of watermilfoil  genus Myriophyllum and watermilfoil  family Haloragaceae.

Native to the Amazon River in South America.  Invasive > learn+quiz Invasive > Global Invasive > in USA+Canada Invasive > report it! Invasive > in USA Invasive > in Michigan

Learn more about parrot feather water-milfoil Myriophyllum aquaticum

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