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Purple Loosestrife - Lythrum salicaria
Family: Lythraceae

THIS PAGE IS UNDER CONSTRUCTION.

Description

Plants are erect, emersed, much-branched perennials, glabrous to often pubescent, growing to 1 m tall. The stems are 4-angled. The leaves are opposite or whorled, sessile, mostly longer than the internode above, 2-10 cm long, 0.5-1.5 cm wide, the base obtuse to cordate. The flowers are whorled in showy terminal bracteate spike-like inflorescences. The 6 petals are rose-purple, to 10 mm long. There are usually 12 stamens.

Interesting facts

Plants grow in marshes, lakes, along river margins, wet meadows, prairies, and ditches. It is estimated that one plant may produce 2.5 million seeds.

Often populations have spread so aggressively that native vegetation is excluded. Several garden races, some with larger rose-red petals, have been produced from this species and are cultivated. It is estimated that 200,000 ha of wetlands in the U.S. are lost annually through invasions of this species.

Links to more information


Website, video, and graphics by Rob Nelson
For more information on this plant or management please contact US Army Corp of Engineers

 

 

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