Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho; also in eastern North America.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas at low to middle elevations.
Origin: Introduced from Europe
Growth Duration: Annual, Perennial
Conservation Status: Not of concern
Pollination: Bees, flies, beetles, wasps