Anemonastrum canadense

Anemonastrum canadense (formerly Anemone canadensis), Canada anemone or meadow anemone, is a colonial perennial herb in the family Ranunculaceae native to moist meadows, stream banks, marsh edges, and damp prairies across much of northern and central North America from Quebec to British Columbia and south to West Virginia, Kansas, and New Mexico. Plants spread aggressively by slender white rhizomes to form extensive ground-covering patches 20–60 cm tall. Each erect, hairy stem bears a single whorl of three to five deeply five- to seven-lobed, sharply toothed, palmately divided, sessile leaves above the basal foliage. The flower stalk rises from the whorl bearing a single bright white, five- (occasionally more) sepalled flower 3–5 cm across with no true petals, a central cluster of golden stamens, and a dome of greenish carpels; a smaller secondary peduncle with one or two leaves and a second flower often arises later. The fruit is a head of flattened, sharply beaked achenes. Flowering occurs in late spring and early summer.