Genus name presumably comes from the Greek word lythron meaning blood with reference to the color of the flowers. Its leaves are sessile, opposite or whorled, lanceolate (2-10 cm long and 5-15 mm wide), with rounded to. Its 50 stems are four-angled and glabrous to pubescent. A number of cultivars, such as the popular ‘Morden Pink’ have been marketed over the years as sterile plants, but there is evidence that some of these cultivars may interbreed. Identification: Purple loosestrife is an erect perennial herb in the loosestrife family (Lythraceae) that develops a strong taproot, and may have up to 50 stems arising from its base. Magenta flowers appear in dense terminal spikes (to 18” long) over a long summer to early fall bloom period. Downy, stemless, lance-shaped leaves (to 4” long) are opposite or sometimes in whorls of three. long (45 cm) held atop lance-shaped leaves. It features pink, purple, or magenta flowers in dense spikes, up to 18 in. It typically grows 2-4’ tall on stiff upright stems. Spectacular when in full bloom, Purple Loosestrife (Lythrum salicaria) is a vigorous, upright perennial enjoying an extremely long bloom season from early to late summer. The problem is that it is so invasive that it can rapidly colonize wet areas and both choke out native vegetation and destroy wildlife habitat. In full flower, a colony of purple loosestrife produces spectacular bloom. This striking and easy to grow plant provides a long period of interest at the back of a border. Varieties Lythrum salicaria ‘Pink Blush’ ‘Pink Blush’. This hardy perennial produces erect spikes of rosy-pink flowers in mid and late summer. It has gradually spread throughout much of the United States, particularly in marshes, swamps, pond peripheries, ditches and wet meadows. Lythrum salicaria, also known as purple loosestrife, will do best planted in moist soil, in full sun. Although many alien invasive plants have naturalized by escaping gardens, purple loosestrife basically began naturalizing on its own in rural areas. from seed contained in ships’ ballast, and it became established in certain estuaries in the northeastern states by the early 1800s. Lythrum salicaria (purple loosestrife) is a wetland herb (family Lythraceae) that invades scattered freshwater wetlands of northern and central California. It is believed to have been first introduced into the U.S. Lythrum salicaria, commonly called purple loosestrife, is a clump-forming wetland perennial that is native to Europe and Asia.
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