Curlyleaf Pondweed

Potamogeton crispus


Curlyleaf pondweed - The entire plant stays underwater, except for the flower stalk, and usually only grows in the spring before dying off in the late summer.

Leaves: Leaves are alternate along the stem, submerged, and oblong in shape. They are also stiff with distinctly wavy edges and fine teeth.

Flowers: Flowers bloom from June-August. Flowers are very small and have 4 petal-like lobes.

Habitat: Grows in shallow or deep water that can either be still or flowing and tolerates disturbances.

Weed Classification: C Select

Why is it a Noxious Weed?

This plant can form dense colonies on the surface that interfere with aquatic recreation, restricting access to docks and fishing areas.

Curlyleaf pondweed has been noted as one of the more severe aquatic nuisance plants in the Midwest and is found in Lewis County.

Control Recommendations:

WA State Noxious Weed Board

UC Davis Weed Report