Also called spiked loosestrife and purple lythrum.

Native to Eurasia and northwest Africa.  Invasive > learn+quiz Invasive > Global Invasive > in USA+Canada Invasive > report it! Invasive > in USA Invasive > in Michigan Biology and Biological Control of Purple Loosestrife (.pdf)

In the 🇺🇸 USA, the USDA suggests those seeking a wet-tolerant plant with a long bloom season replace this plant with native alternatives swamp milkweed Asclepias incarnata, sweet pepperbush Clethra alnifolia, eastern purple coneflower Echinacea purpurea, gayfeather Liatris spicata, grass-leaved blazing star Liatris pilosa, green-headed coneflower Rudbeckia laciniata or New York ironweed Vernonia novaboracensis. [1]

Uses by native peoples
(Ethnobotany database)

For kids!  This plant described in a USDA Forest Service coloring noxious weeds page.

Learn more about purple loosestrife Lythrum salicaria

Best Control Practices BCP (Ontario) (.pdf) and its Technical Bulletin (.pdf) Biology and Biological Control (.pdf) Biological Control in Eastern USA (.pdf page 157)
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