Page authors: Don Knoke, David Giblin
Daucus pusillus
American wild carrot, rattlesnake weed

Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; southwestern British Columbia to California, east across the southern U.S. to the Atlantic Coast.

Habitat: Grassy balds, headlands, rocky outcroppings, and other to seasonally moist open areas at low elevations.

Flowers: May-July

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Generalist


Slender, single-stemmed annual from a slender taproot, 0.5-6 dm. tall, with short, stiff, blunt bristles throughout.


Leaves 3-pinnate, long petiolate, the blades 3-10 cm. long and 1.5-7 cm. wide, the ultimate segments linear, 1-5 mm. long and 0.5-1 mm. wide.


Involucral bracts pinnatifid into linear segments up to 8 mm. long; bractlets of the involucel linear and entire, about equaling the pedicels; inflorescence 1-4 cm. wide, the rays up to 4 cm. long; ultimate umbellets with 5-12 white flowers.


Fruit oblong, 3-5 mm. long and 2 mm. wide, broadest below the middle, with prickles and bristles on the ribs.

Accepted Name:
Daucus pusillus Michx.
Publication: Fl. Bor.-Amer. (Michaux) 1: 164. 1803.

Synonyms & Misapplications:
Daucus carota L. var. microphyllus
Daucus microphyllus
Additional Resources:

PNW Herbaria: Specimen records of Daucus pusillus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Daucus pusillus checklist entry.

OregonFlora: Daucus pusillus information.

E-Flora BC: Daucus pusillus atlas page.

CalPhotos: Daucus pusillus photos.

USDA Plants: Daucus pusillus information.

17 photographs:
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