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Lythrum (weeds) L. - (loosestrife)
The genus contains around 35 species of herbaceous plants which are found in temperate regions. Some species are used as ornamental, but the genus is more important for its weeds, above all Lythrum salicaria, purple loosestrife, which is native to Europe and has been introduced into North America where it grows in wetlands. The members of the genus have a cylindrical or square stem, lanceolate leaves and usually purple or pink flowers with 6 petals.
Currently, the following species have been entered into the system: