Lythrum salicaria

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Legend for Species Pages

Purple Loosestrife, Including “Morden Pink”

Lythrum salicaria L.
  • ANPC Rank –
  • Moss, Flora of Alberta – Rare
  • Global Invasive Species Database – Yes[1]
  • NatureServe Rank – High
  • Haber, Upland – No
  • Haber, Wetland – Principal
  • CWF, Status & Invasive Range – High, coast-to-coast
  • Alberta Revegetation Guidelines – No
  • The Nature Conservancy – Yes, w/ ESA
  • CBCN – High
  • AB Weed – Prohibited Noxious


A plant of the water margin that can form dense stands. Although it survives in gardens, seed germination seems to occur mainly in wet soils. Invasive in wetlands, considered “rare” in Flora of Alberta, an indication that some rarities are potentially not so rare, given time. Forms dense stands that exclude native species including mammals and birds as well as plants.

Alberta Invasive Plants Council factsheet:

[2] Link to USDA Plants Profile for Lythrum salicaria L. purple loosestrife

[3] Link to NatureServe I-Rank info for Lythrum salicaria L.

[4] Link to Missouri Department of Conservation, Vegetation Management Guide, Purple Loosestrife (Lythrum salicaria L.)

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