Distribution: Introduced sparingly in Washington, usually along the coast; British Columbia south to California; upper central and eastern North America.
Habitat: Disturbed ground.
Origin: Introduced from Europe
Conservation Status: Not of concern
Glabrous annual or biennial herb, the stems 3-10 dm. tall, usually branched above.
Leaves alternate, pinnatifid into 10-16 equal, evenly spaced, linear-elliptic segments, with very narrow, membranous, minutely wavy-denticulate margins.
Inflorescence of bracteate, elongate, spike-like racemes; pedicles short; sepals 5, lanceolate, about half the length of the corolla; petals 5, grayish- to greenish-white, irregular but nearly equal, 4-6 mm. long, the basal portion short and rounded, the upper portion obovate with a wedge-shaped base, shallowly to deeply lobed into 3 linear segments, the center segment the narrowest; stamens about 10, attached to a 1-sided disk, slightly shorter than the petals; stigma sessile, small, globose.
Capsules oblong, 10-13 mm. long.