Submersed Weeds
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Northern Milfoil
Leaves whorled in groups of four. Each leaf is divided into many thread-like leaflets extending from a central rib. Forms tangled mats at the surface.
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Eurasian Milfoil
Leaves whorled in groups of 3 to 6. Each leaf is divided into 14 to 24 leaflets extending from a central reddish brown rib. Form tangled mats on the water surface.
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Parrot Feather
A type of Milfoil. Leaves whorled in groups of four to six. Each leaf is divided into 18 pairs of thread-like segments resembling a feather.
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Coontail
Leaves whorled around the stem and have a serrated appearance. Spacing between leaf whorls is variable. Weeds may be long and sparse or bushy.
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Elodea
Similar to Hydrilla. Leaves whorled in groups of three. Elodea leaves have a smooth edge.
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Hydrilla
Hydrilla has leaves whorled in groups of three or more. Leaves have a serrated edge with two to three pointed spines on the midrib of the underside.
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Bladderwort
Finely divided leaves scattered along the stem with numerous bladder-like structures on leaves.
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Horned Pondweed
Leaves are long and thread-like. Oppositely arranged on the stem
unlike other pondweeds.
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Bushy Pondweed
Leaves are narrow with tiny spines along the edges. Leaves slightly
enlarged at the base. Stems slender with frequent branching.
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Leafy Pondweed
Short grass-like leaves that measure one to three inches long and
branch freely on a slender stem. Leaves are alternately arranged on
the stem.
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Sago Pondweed
Leaves are stiff, narrow and thread-like. Stems branched with leaves
alternately arranged on the stem. Spreading leaves resemble a fan
with an overall bushy appearance.
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Large-Leaf Pondweed
Leaves are both floating and submersed. Submersed leaves are
large, oblong, wavy and taper to the stem.
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Floating-Leaf Pondweed
Leaves are both floating and submersed. Submersed leaves long
and narrow. Floating leaves oblong and slightly heart-shaped at
the base.
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Curly-Leaf Pondweed
Leaves are thin with wavy and finely serrated edges. Stems are
branched. Upper leaves are often crispy and appear waxy.
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Clasping-Leaf Pondweed
Leaves are wide and wavy with smooth edges. Broad leaf base
clasps the stem. The upper stem is commonly branched and
leafy.
Northern Milfoil
Leaves whorled in groups of four. Each leaf is divided into many thread-like leaflets extending from a central rib. Forms tangled mats at the surface.
Eurasian Milfoil
Leaves whorled in groups of 3 to 6. Each leaf is divided into 14 to 24 leaflets extending from a central reddish brown rib. Form tangled mats on the water surface.
Parrot Feather
A type of Milfoil. Leaves whorled in groups of four to six. Each leaf is divided into 18 pairs of thread-like segments resembling a feather.
Coontail
Leaves whorled around the stem and have a serrated appearance. Spacing between leaf whorls is variable. Weeds may be long and sparse or bushy.
Elodea
Similar to Hydrilla. Leaves whorled in groups of three. Elodea leaves have a smooth edge.
Hydrilla
Hydrilla has leaves whorled in groups of three or more. Leaves have a serrated edge with two to three pointed spines on the midrib of the underside.
Bladderwort
Finely divided leaves scattered along the stem with numerous bladder-like structures on leaves.
Horned Pondweed
Leaves are long and thread-like. Oppositely arranged on the stem unlike other pondweeds.
Bushy Pondweed
Leaves are narrow with tiny spines along the edges. Leaves slightly enlarged at the base. Stems slender with frequent branching.
Leafy Pondweed
Short grass-like leaves that measure one to three inches long and branch freely on a slender stem. Leaves are alternately arranged on the stem.
Sago Pondweed
Leaves are stiff, narrow and thread-like. Stems branched with leaves alternately arranged on the stem. Spreading leaves resemble a fan with an overall bushy appearance.
Large-Leaf Pondweed
Leaves are both floating and submersed. Submersed leaves are large, oblong, wavy and taper to the stem.
Floating-Leaf Pondweed
Leaves are both floating and submersed. Submersed leaves long and narrow. Floating leaves oblong and slightly heart-shaped at the base.
Curly-Leaf Pondweed
Leaves are thin with wavy and finely serrated edges. Stems are branched. Upper leaves are often crispy and appear waxy.
Clasping-Leaf Pondweed
Leaves are wide and wavy with smooth edges. Broad leaf base clasps the stem. The upper stem is commonly branched and leafy.