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American Pondweed

Potamogeton nodosus

American pondweed has oval-shaped leaves that spread across the water surface. The seed head extends above the water on slender stalks. American pondweed can form dense mats and block sunlight for submersed vegetation. American pondweed can be mistaken for Illinois pondweed.

Also known as: Illinois pondweed; Pondweed