Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east across most of North America to the Atlantic Coast.

Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas at low elevation.

Flowers: May-November

Origin: Introduced from Europe

Growth Duration: Annual, Biennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, butterflies, flies, beetles, wasps, apomixis?

Branched annual, 1-9 dm. tall, often covered with short, stiff, pointed yellow hairs throughout, with milky juice.

Basal leaves petiolate, the blade lanceolate to oblanceolate, with fine teeth to pinnatifid, 3-30 cm. long and 5-45 mm. wide; cauline leaves reduced upward, becoming sessile, narrowly lanceolate, clasping and auriculate.

Heads several or numerous, 20-60 flowered; involucre 5-8 mm. high, its inner bracts 8-16, white-woolly and often glandular-bristly with black hairs, becoming spongy-thickened on the back; outer bracts linear, less than half as long as the inner.

Achenes tawny, 1.5-2.5 mm. long, tapered at both ends.