Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California and Arizona, and Texas eastward and northward to the Atlantic Coast.
Habitat: Roadsides, gardens and wasteland.
Origin: Introduced from South America (or possibly Eurasia)
Conservation Status: Not of concern
Low, spreading, glabrous to scurfy-pubescent annual, the stems freely-branched, decumbent, 2-5 dm. long.
Leaves alternate, numerous, ovate-oblong, 1.5-3 cm. long, pinnatifid, the segments narrow, entire to pinnatifid.
Inflorescence of many-flowered, crowded, axillary, bractless racemes 1-4 cm. long; pedicles slender, 1.5-2.5 mm. long; sepals 4, spreading, 0.5 mm. long, deciduous; petals 4, white, linear, minute; stamens 2.
Silicles strongly wrinkled, 2 mm. broad and 1.5 mm. long, cordate and notched, inflated and slightly obcompressed.