Distribution: Introduced in the northern half of the United States
Habitat: Noxious weed in eastern Washington and Idaho
Flowers: June - August
Origin: Introduced from Asia
Conservation Status: Not of concern
Glabrous, glaucous perennial, the stems freely-branched, 4-8 dm. tall.
Leaves opposite, lanceolate to linear, 2-5 cm. long and under 1 cm. broad, 1-nerved.
Flowers small, numerous, in large, diffusely branched, leafy-bracteate inflorescences; pedicels slender, 2-4 times as long as the flowers; calyx top-shaped, shallowly 5-lobed, 2 mm. long; petals 5, white, oblanceolate, slightly longer than the calyx, stamens 10; styles 2.
Capsule ovoid, equaling the calyx, 1-celled and 4-valved.