This plant is a rhizomatous perennial herb producing a flattened, branching stem up to a meter long. The leaves are linear or oblong in shape, narrower than broad-leaved pondweed, bog pondweed, fen pondweed, shining pondweed, and perfoliate pondweed. The thick leaves are up to 8 centimeters long and nearly one wide, and they are distinctive for their ruffled or wavy, serrated edges. They lack petioles. Turions occur in leaf axils and at stem tips.
This pondweed is considered an invasive species in some areas where it is found, such as much of North America. It was introduced accidentally to the Great Lakes and inland lakes within that region. The plant thrives in conditions normally less habitable to native plant species. It competes with native plant life and sometimes displaces it. It clogs waterways, inhibiting aquatic recreation and is considered a nuisance in some areas.
- Jepson Manual Treatment
- USDA Plants Profile
- Washington Burke Museum
- Photo gallery
- GLANSIS Species FactSheet
- Species Profile- Curly Pondweed (Potamogeton crispus), National Invasive Species Information Center, United States National Agricultural Library. Lists general information and resources for Curly Pondweed.