Lythrum salicaria - Purple Loosestrife - Profile from PLANTS database: photographs, classification, distribution in the U.S., status as a weed under state laws, and related links. plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=LYSA2
Lythrum virgatum - European Wand Loosestrife. plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=LYVI3
Purple Loosestrife (Lythrum salicaria) - Documents the spread and impact of purple loosestrife in North America. www.npwrc.usgs.gov/resource/1999/loosstrf/loosstrf.htm
Purple Loosestrife Fact Sheet - Lythrum salicaria L. (also called spiked loosestrife, rainbowweed; salicaire). Invasive Exotic Plants of Canada fact sheet discusses field recognition, habitat, history of introduction and spread, biology, and control measures. Includes photos and map. infoweb.magi.com/~ehaber/factpurp.html
