Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho, also in eastern North America and Greenland.
Habitat: Roadsides, fields, forest edge, wastelots, and other disturbed areas where seasonally moist.
Origin: Introduced from Eurasia
Conservation Status: Not of concern
Taprooted, leafy-stemmed, branching annual, the stem glabrous and often purple, 5-15 dm. tall.
Leaves basal and cauline, with short, stiff hairs, gradually reduced upward, petiolate, the blade 2-3 pinnately dissected with small ultimate segments.
Rays 3-6, 1-2.5 cm long; involucre wanting; involucel of a few small bractlets; umbellets with 3-7 flowers, the calyx obsolete, the five petals white; the pedicels short, each with a ring of short, flattened hairs at the summit.
Fruit oblong, 4-5 mm. long, beaked, black and smooth.