purple loosestrife, spiked loosestrife, purple Lythrum (Lythrum salicaria)

Lythrum salicaria is unplaced species in  the family Lythraceae  subfamily: Lythroideae,  
Genus Lythrum 
Infraspecific taxa recognized within : infraspecific taxa
This species is found in Europe, Asia, northwest Africa, and southeastern Australia.