Leafy Pondweed

Isolated close up of leafy pondweed on white background.

Leafy pondweed has thread like branching stems. Submersed leaves are green to bronze, thin, and linear. Brown flowers grow in clusters.

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Horned Pondweed

Horned pondweed floating in a cluster at the surface of the water.

Horned pondweed roots, stems, and leaves are all long and thread like. It has tiny single flowers in May or June. The seeds are horn shaped.

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Waterthread Pondweed

Isolated close up of waterthread pondweed on white background.

Waterthread pondweed’s stems are thread like. Submersed leaves are thin and straight. Floating leaves are leathery with a rounded base.

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Variable Leaf Pondweed

Close up of variable leaf pondweed floating on water.

Variable leaf pondweed’s submersed pointy leaves grow more than five inches long. Floating leaves can be almost three inches long with longer leaf stalks.

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Ribbonleaf Pondweed

Close up of ribbonleaf pondweed from above.

Ribbonleaf pondweed’s submersed leaves are floppy and bright green to reddish. They grow two to 10 inches long and nearly a half inch wide.

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Widgeon Grass

Mat of widgeon grass floating at the surface of the water.

Widgeon grass has thin branched stems and sharp pointed leaves that are thread like. Flower spikes can emerge slightly and are brown to yellow.

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Indian Swampweed

Indian swampweed underwater.

Indian swampweed has compound leaves with opposite leaflets that can be emersed or submersed and are broader at the tip. This plant is uncommon.

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Brittle Naiad

Isolated brittle naiad on white background.

Brittle naiad has dark green leaves with serrated edges. Leaves grow two-tenths of an inch long. Flowers can grow to three-fourths of an inch.

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Marine Naiad

Marine naiad close up of spikes and stems.

Marine naiad is a submerged plant with small brittle leaves that are stiff and toothed.

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Illinois Pondweed

Illinois Pondweed

Illinois Pondweed has lance shaped submerged leaves eight inches long that come to a point at the end.

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Carolina Fanwort

Carolina fanwort on white background

Fanwort is a delicate, feathery looking submerged plant. It has a few elongated floating leaves. The slender stems have a thin jelly coating.

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