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Purple Loosestrife

Lythrum salicaria

Shrill carder bee (Bombus sylvarum) on the purple loosestrife (Lythrum salicaria). Pollen basket contains dark green pol

Purple-loosestrife, an invasive species, now dominates the Cooper Marsh Conservation Area, near Cornwall, Ontario.

Lythrum salicaria or purple-loosestrife is a flowering plant belonging to the family Lythraceae. It should not be confused with other plants sharing the name loosestrife that are members of the genus Lysimachia in the family Primulaceae. This herbaceous perennial plant is native to temperate regions of Europe, Asia, northern Africa, and eastern Australia.

Quick Facts

Scientific name Lythrum salicaria
Family Lythraceae
Height 4-8 ft
Bloom time Jul-Sep
Sun Full sun
Moisture Wet
Soil Muck
Wildlife value INVASIVE, state prohibited. One plant makes over 2 million seeds; converts marshes to monoculture

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Image Credits

  • Ivar Leidus (CC BY-SA 4.0)
  • Saffron Blaze (CC BY-SA 3.0)

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