Description: plants are fully submerged and rooted underwater, stems usually grow 3-10 ft. (0.9-3 m) in length, but can be as much as 30 ft. (9.1 m) long.  Leaves are bright green, finely dissected, and whorled. The delicate leaflets give this plant a feathery appearance.

​

Ecological Threat:  forms dense mats that can restrict light, out-competing native plants, clogging waterways, and restricting the oxygen level of water.

 

Biology & Spread:  These plants are highly competitive and grow rapidly.

 

In Oklahoma:  Eurasian milfoil is the most abundant and widespread aquatic invasive plant in Oklahoma.  It is found across the state and in over a dozen public lakes.  Water bodies of the Wichita Mountains Wildlife Refuge has large infestations.

​

Management: Aquatic Weed Management, OSU Extension Factsheet

 

Additional Information: Problem Horticultural Plants, OSU Extension Factsheet