Eurasian Milfoil

Myriophyllum spicatum

Eurasian Milfoil
Eurasian Milfoil

In the clear water of Quanah Parker Lake, Wichita Mountains National Wildlife Refuge

press to zoom
Eurasian Milfoil
Eurasian Milfoil

In the clear water of Rush Lake, Wichita Mountains National Wildlife Refuge

press to zoom
Eurasian Milfoil
Eurasian Milfoil

Submerged vegetation

press to zoom
Eurasian Milfoil
Eurasian Milfoil

In the clear water of Quanah Parker Lake, Wichita Mountains National Wildlife Refuge

press to zoom
1/4

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