Eurasian Watermilfoil
(Myriophyllum spicatum)

Description:
Watermilfoil is a submerged aquatic plant that grows in fresh and salt water up to 14 feet deep. It has a feather-like appearance. It's leaves collapse around the stem when removed from the water. Mature leaves are whorls around the stems. Each leaf has 12 or more leaflets per side. The upper leaves and stems may be reddish-brown or pink. Spikes rise above the water surface to produce seeds, then submerge after pollination.
 

Control:

• Mechanical: Once Watermilfoil starts growing it is almost impossible to control. New infestations can be controlled by physically pulling the entire plant (with roots) and removing it from the water body.
• Biological: Unknown at this time
• Herbicide: Refer to the State Noxious Weed Control Board site. Do not use herbicides in wetland or aquatic areas without first contacting your local Weed Control Agency.

For More Information:
Detailed information about Eurasian Watermilfoil is available at the Washington State Noxious Weed Control Board Web Site.