Loosestrife Family
3 genera
6 species
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Ammannia coccineavalley redstem
Distribution: Known only from a restoration site in King County; California east along Mexican border to central and eastern U.S.
Habitat: Restored wetland.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Ammannia robustawestern ammania, grand redstem
Distribution: Occurring east of the Cascades crest in Washington chiefly along the Columbia River; British Columbia to California, east to the Great Lakes region and midwestern U.S.
Habitat: Wet places, often where alkaline.
Origin: Native
Flowers: May-June
Growth Duration: Annual
Lythrum hyssopifoliahyssop loosestrife
Distribution: Scattered locations on both sides of the Cascades in Washington; British Columbia south to California; eastern North America.
Habitat: Moist, disturbed areas.
Origin: Introduced
Flowers: May-September
Growth Duration: Annual
Lythrum portulaspatula-leaf loosestrife
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Wetlands, disturbed moist areas.
Origin: Introduced
Flowers: June-September
Growth Duration: Annual
Lythrum salicariapurple loosestrife, long purples
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Noxious weed of standing water and wet ground.
Origin: Introduced from Europe
Flowers: July-September
Growth Duration: Perennial
Rotala ramosiorlowland toothcup
Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; south-central British Columbia to Mexico and South America, east to the Atlantic Coast.
Habitat: Muddy shorea and other wet places.
Origin: Native
Flowers: June-August
Growth Duration: Annual