Invasive Plant Identification

What To Look For

• Thick or matted vegetation & plants found in and around swimming areas, docks and in boat channels.
• Plants that grow in abundance on the water’s surface.
• Plants growing so densely that they fill the water column and decrease the quality of aquatic habitats.

Concerns of Invasive Species

• Able to grow aggressively, which chokes out native aquatic vegetation.
• Dense mats block sunlight to other submerged plants, aquatic habitats and native species.
• Alters water quality by raising pH levels, decreasing oxygen and increasing water temperature.
• Inhibits recreational activities including, swimming, fishing and boating.
• Easily dispersed by boating equipment, waterfowl, accidental or intentional introductions.
• Causes stagnant water, providing habitat for breeding mosquitoes, algae and other bacterium.
• Marketing studies have shown the appearance of aquatic "weeds" lowers real-estate values as much as 20%

Curly Leaved Pondweed

Freshwater lakes, rivers, streams, ponds & canals. Root easily in silt, muck or clay bottoms and can appear in gravel or sand.

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Eurasian Water-Milfoil

Forms extremely dense stands with entangled branches on top and just below the water surface over large areas.

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European Frog Bit

Fast growing, it forms large, dense floating mats of intertwining plants, greatly reducing native submerged plants while covering and diminishing sunlight.

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European Water Chestnut

Forms extremely large dense floating mats of vegetation that shade out native plants and organisms below.

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Fast growing plants form thick mats that crowd out native plants, block sunlight to submerged plants, disrupt fish communities and clog drainage canals.

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Forms thick, dense stands in the water column which easily displace native plants and aquatic organisms.

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