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Governmental Agencies Nationwide

Purple Loosestrife - The Nature Conservancy (America's Least Wanted)

Purple Loosestrife Info Centre - Manitoba Purple Loosestrife Project

Invasivespecies.gov - U.S. federal and state information

Lythrum (Purple Loosestrife) - Pest Tracker by NAPIS (National Agricultural Pest Information System) (CONTROL NEWS, FACTS, MAPS, SITES)

Lythrum salicaria: Purple Loosestrife - The Invasive Species Initiative (MAPS, CONTROL METHODS)

Purple Loosestrife - National Park Service/Plant Conservation Alliance, Alien Plant Working Group (FACTSHEET)