Garden Loosestrife, Lysimachia vulgaris
Our colleagues in King County, WA have written a great profile of Garden Loosestrife, Lysimachia vulgaris, which is a recent introduction to the Pacific Northwest. This aquatic plant has been spreading rapidly in parts of Washington, aided by its striking red rhizomes that can grow up to 10 feet long. Garden loosestrife can clog waterways and reduces habitat for native species including salmon.
Oregon had a report of Garden Loosestrife last year via the Oregon Invasive Species Hotline on the Willamette River north of Salem. With the help of this early detection, the Oregon Department of Agriculture was able to eradicate this patch. But it's likely that there are other patches present. King County's article stresses that Garden Loosestrife is a tough plant to eradicate, so early detection and treatment is key to effective management.
Keep an eye out for bright yellow flowers on the water, read about identification tips from King County's article, and share your observations!
Happy summer,
Lindsey
Comments
Thanks for the info! I haven't seen this in the Portland area but will keep an eye out.
Thanks Sarah! If you do come across it, or something that look suspicious, please ping me when you add the observation so I don't miss it.
Add a Comment