Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, east to the northern Rocky Mountains and northern Great Plains, Texas, and eastern North America.

Habitat: Weed of cultivated areas and abondoned gardens.

Flowers: April-July

Origin: Introduced from Eurasia

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, wasps

Somewhat fleshy annual, the upright stem 2-5 dm. tall, simple or occasionally branched below, umbellately branched near the top, nearly glabrous below but with dense, soft hairs above.

Lower cauline leaves alternate, oblanceolate, narrowed to the base, 1-3 cm. long, finely serrate-dentate; floral leaves opposite or whorled, finely toothed.

Flowers naked in obconic involucres, these bearing 4 greenish-yellow glands alternate with horn-less lobes; staminate flowers numerous, included in the involucre, represented by a single stamen; pistillate flower single, protruded from the involucre.

Capsule 3-celled, smooth.