Watchlist & Prohibited
Brazilian Elodea
Rapid growth leads to dense, monospecific mats on the surface of the water. These mats crowd out native
Rapid growth leads to dense, monospecific mats on the surface of the water. These mats crowd out native
Invasive water-primrose species are aquatic plants that can thrive and spread in shallow water areas including wetlands and
The origins of its introduction are unknown, but it is suspected that it was possibly imported as an
Eurasian watermilfoil (Myriophyllum Spicatum) is a plant native to Europe and Asia that was first documented in North
Hydrocharis morsus-ranae, better known as European Frogbit, is an aquatic, invasive species currently spreading throughout the Great Lakes
Flowering rush originated in Eurasia but can now be found throughout the Midwest, including in Southern Michigan, and
Giant Hogweed is a Federally listed noxious weed. Its sap, in combination with moisture and sunlight, can cause
Hydrilla is a stocky whorled submergent plant with spiny leaves in whorls of approximately 4-6. It is well
Two non-native invasive plants that have been gaining a foothold in recent years in Northern Michigan are Japanese
Phragmites (Phragmites australis), also known as the common reed, is an aggressive wetland invader that grows along the
Parrot feather is an aggressive whorled aquatic plant that is similar to watermilfoils, but emergent. Its stems can
Purple loosestrife (Lythrum Salicaria) is an invasive wetland plant that is beautiful, but dangerous. Imported in the 1800s
Rock Snot, also known as didymo, is a non-indigenous nuisance diatom. It can form large mats along the
Starry stonewort is a submerged aquatic macroalgae with many irregular branches. It is native to Europe and was
Water chestnut forms dense mats that shade out native aquatic vegetation, leading to a decrease in biodiversity. Decomposition
Dense mats of vegetation can form to crowd out native species and decrease biodiversity. Water soldier can potentially
Yellow floating heart can create dense mats that shade out native aquatic plants, decrease oxygen levels, increase mosquito
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