Lythraceae - loosestrife family
 

WeedsPoisonous PlantsHay Fever
Gerald A. Mulligan (Agriculture Canada, Ottawa, retired)
Lythrum salicaria L., purple loosestrife, salicaire commune
Persistent perennial; stems 1 to 9 feet (3 to 27 dm.) high; sometimes 30 to 50 stems from a single root; flowers purple; throughout, but most common in the maritime-east, east, and maritime-west; in areas that are temporarily flooded in the springtime when the roots are dormant; it is not an aquatic, not being able to survive if submersed during its active growing period; introduced from Europe. It first appeared in North America in the early 1800s, and has since become a dominant plant in some habitats. Fireweed is sometimes mistaken for purple loosestrife (see photos of fireweed under Onagraceae-evening-primrose family).

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Weed Name Photo Weed Name Photo
purple loosestrife, salicaire commune purple loosestrife, salicaire commune
purple loosestrife, salicaire commune
(inflorescence close up)
purple loosestrife, salicaire commune
(flower close up)
purple loosestrife, salicaire commune
(seedling)
purple loosestrife, salicaire commune
(in field)
purple loosestrife, salicaire commune
(a large stand)