Distribution: Occurring on both sides of the Cascades crest in Washington, but more common on the west side; widely distributed throughout North America.
Habitat: Roadsides and waste ground.
Origin: Introduced from Europe
Conservation Status: Not of concern
Mostly glabrous annual with a short taproot, 1-10 dm. tall, the juice milky.
Lowermost leaves ovate and petiolate, the others pinnatifid, with backward-pointing segments, or occasionally merely toothed, 6-30 cm. long and 1-15 cm. wide, the margins weakly prickly; all leaves with prominent, pointed auricles; leaves progressively less-divided upwards and somewhat reduced.
Heads several in a flat-topped inflorescence, relatively small, usually only 1.5-2.5 cm. wide; involucre 9-14 mm. high, the bracts of uneven lengths, some quite short; corollas all ligulate and perfect, yellow; pappus of numerous, white, capillary bristles.
Achenes 2.5-3 mm. long, with transverse wrinkles.