Page authors: Don Knoke, David Giblin
Anthemis cotula
mayweed chamomile, stinking chamomile, dogfennel

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.

Habitat: Roadsides, fields, ditches, wastelots, and other disturbed areas generally at low elevations.

Flowers: May-October

Origin: Introduced from Europe

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Self-pollination


Ill-smelling, glabrous, branched annual, 1-6 dm. tall.


Leaves 2-6 cm. long, 2 or 3 times pinnatifid, with very narrow segments.


Heads fairly numerous, short-pedunculate at the ends of the branches, the disk 5-10 mm. wide, becoming ovoid at maturity; involucre with a few soft hairs, the bracts imbricate, dry, their margins papery; rays 10-20, white, sterile and neutral, 5-11 mm. long; disk flowers perfect, yellow; receptacle chaffy only towards the middle, its firm, narrow, awn-shaped bracts tapering to the apex; pappus none.


Achenes sub-terete, 10-ribbed, with small glandular bumps.

Accepted Name:
Anthemis cotula L.
Publication: Sp. Pl. 2: 894. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Anthemis cotula in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Anthemis cotula checklist entry

OregonFlora: Anthemis cotula information

E-Flora BC: Anthemis cotula atlas page

CalPhotos: Anthemis cotula photos

36 photographs:
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