Stateīig-Navarro-Garcia Butte Creek Clear Creek-Sacramento River Coyote Honcut Headwaters-Lower Feather Klamath Lost Lower American Lower Pit Lower Sacramento Lower Sacramento Mojave Monterey Bay North Fork American Pajaro Russian Sacramento-Stone Corral San Francisco Bay San Francisco Coastal South San Joaquin Delta San Luis Rey-Escondido San Pablo Bay South Fork American South Fork Kern Suisun Bay Tomales-Drake Bays Tulare Lake Bed Upper Bear Upper Cache Upper Calaveras California Upper Coon-Upper Auburn Upper Merced Upper Tuolumne Upper YubaĬache La Poudre Clear Colorado Headwaters-Plateau Middle South Platte-Cherry Creek Middle South Platte-Sterling North Platte San Miguel South Platte South Platte Headwaters St. The list of references for all nonindigenous occurrences of Lythrum salicaria are found here. Names and dates are hyperlinked to their relevant specimen records. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Interactive maps: Point Distribution Maps The fruit is a capsule about 2 mm in diameter and 3-4 mm long with many small, ovoid dust-like seeds (< 1 mm long) (USDA plants database 2008). The short-styled type has long and medium length stamens, the medium type has long and short stamens, and the long-styled has medium to short stamens. Individual plants may have flowers of three different types classified according to stylar length as short, medium, and long. Twelve stamens are typical for each flower. The showy corolla (up to 2 cm across) is rose-purple and consists of five to seven petals. Typically the calyx lobes are narrow and thread-like, six in number, and less than half the length of the petals. The calyx and corolla are fused to form a floral tube (also called a hypanthium) that is cylindrical (4-6 mm long), greenish, and 8-12 nerved. Each inflorescence is spike-like (1-4 cm long), and each plant may have numerous inflorescences. Leaf surfaces are pubescent (USDA Plants Database 2008). Its leaves are sessile, opposite or whorled, lanceolate (2-10 cm long and 5-15 mm wide), with rounded to cordate bases.

Its 50 stems are four-angled and glabrous to pubescent. 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.

Purple loosestrife plant