Purple Loosestrife (Lythrum salicaria)
This plant crowds out native vegetation, especially around wetlands. The purple flowers are set close along the stem (a “spike” arrangement) and usually each have six petals. The stem is square in cross-section. Classified as a noxious weed under the BC Weed Control Act.
This plant has been found at Cusheon Lake and a control program is in place. Please report other sightings to the Salt Spring Island Conservancy.