![]() Illustrated flora of the northern states and Canada. Infestation Southeast Minnesota, September Rees, USDA Agricultural Research Service - Retired, īritt Slattery, US Fish and Wildlife Service, ![]() Fish and Wildlife ServiceĮric Coombs, Oregon Department of Agriculture, Plant Invaders of Mid-Atlantic Natural Areas - National Park Service and U.S.Global Invasive Species Database - Invasive Species Specialist Group.Element Stewardship Abstract - The Nature Conservancy.Weeds Gone Wild: Alien Plant Invaders of Natural Areas - Plant Conservation Alliance.Biology and Biological Control of Purple Loosestrife - USDA Forest Service.Southeast Exotic Pest Plant Council Invasive Plant Manual - SE-EPPC.Biological Control of Invasive Plants in the Eastern United States - USDA Forest Service.Best Management Practices - Ontarios Invading Species Awareness Program. ![]() Identification, Biology, Control and Management Resources It was first introduced into North America in the early 1800s for ornamental and medicinal purposes. Lythrum salicaria is native to Europe and Asia. It can also hybridize with native loosestrife species, potentially depleting the native species gene pool. This plant can spread very rapidly due to its prolific seed production each plant can produce up to 2.5 million seeds per year. It can quickly form dense stands that completely dominate the area excluding native vegetation. Ecological Threat Lythrum salicaria is a serious invader of many types of wetlands, including wet meadows, prairie potholes, river and stream banks, lake shores, tidal and nontidal marshes, and ditches. Fruit Fruits are capsules that are enclosed in the hairy sepals and contain several reddish brown seeds. Flowers have 5-7 petals and twice as many stamens as petals. (10.2-40.6 cm) long spikes at the tops of the stems. Flowers Flowering occurs in July to October, when pink to purplish flowers develop in 4-16 in. (3.8-10.2 cm) long and round or heart-shaped at the base. Foliage The opposite or whorled leaves are dark-green, lance-shaped, sessile, 1.5-4 in. Native Range: Europe ( ) Old World ( BAIL)Īppearance Lythrum salicaria is a tall, multistemmed (30-50 per plant), perennial forb that can grow up to 10 ft. Synonym(s): purple lythrum, rainbow weed, salicaire, spiked loosestrife Taxonomic Rank: Magnoliopsida: Myrtales: Lythraceae Jump to: Resources | Images | Distribution Maps | Sources
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