Distribution: Occurring on both sides of the Cascades crest and in the Columbia River Gorge in Washington; Alaska to Oregon, east to Montana, east across Canada to the Great Lakes region and eastern North America.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas.
Origin: Introduced from Eurasia
Growth Duration: Perennial
Conservation Status: Not of concern
Aromatic, perennial herb, 0.5-1.5 m. tall, simple or branched above, glabrous below the inflorescence.
Leaves glabrous and green above, densely white-woolly beneath, obovate or ovate in outline, 5-10 cm. long and 3-7 cm. wide; principle leaves cleft nearly to the mid-rib into acute, unequal segments, which are again toothed or cleft, usually with one or two stipule-like lobes at the base.
Inflorescence ample and leafy; involucre 3.5-4.5 mm. high, somewhat woolly; heads discoid, the flowers all fertile, the outer pistillate, the inner perfect.