The document discusses curly leaf pondweed, an invasive aquatic plant native to Eurasia. It describes its physical characteristics and life cycle, noting it grows actively in winter and reproduces through turions, seeds, and fragmentation. The plant has spread across the continental US and negatively impacts recreation, property values, and water quality by triggering algae blooms and dissolved oxygen depletion. Effective management includes prevention, physical removal, and chemical control in early spring using herbicides such as endothol, fluridone, and diquat.