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Washington State Weeds

Water Primrose

Ludwigia hexapetala

Family Name:


Class: B
Other Names:


 Why is it a noxious weed?

It is an invasive aquatic species that forms extensive mats, impairing water flow and shoreline activity. It can dominate shoreline vegetation if introduced to lakes, rivers, ponds or streams. It is very difficult to control once established.

More Information:




Visit Washington State Noxious Weed Control Board Here