Weed or flower? Sometimes it's in the eye of the beholder - Indiana Yard and Garden - Purdue Consumer HorticulturePurdue University Indiana Yard and Garden – Purdue Consumer Horticulture
Gooseneck loosestrife - FineGardening
PCA Alien Plant Working Group - Purple Loosestrife (Lythrum salicaria)
Lythrum salicaria - Wikipedia
Purple Loosestrife :Got Pests? : Board of Pesticides Control: Maine DACF
Beautiful But Noxious: Purple Loosestrife | focusonflowers - Indiana Public Media
Washington State Noxious Weed Control Board
Purple Loosestrife - Cuyahoga Valley National Park (U.S. National Park Service)