Page authors: Don Knoke, David Giblin
Bidens cernua
nodding beggar-ticks, bur-marigold

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

Habitat: Stream banks, pond and lake edges, and other wet places at low elevations.

Flowers: July-September

Origin: Native

Conservation Status: Not of concern


Annual, nearly glabrous throughout, 1-10 dm. tall.


Leaves sessile, simple, lance-linear to lance-ovate, serrate to sub-entire, 4-20 cm. long and 5-45 mm. wide.


Heads hemispheric, the disk 12-25 mm. wide, nodding in age; outer involucral bracts 5-8, lance-linear, leafy and spreading, inner bracts yellowish above; rays 6-8, yellow, up to 1.5 cm. long, or rarely wanting


Achenes narrowly triangular, compressed-quadrangular, 5-8 mm. long, with persistent pappus of four retrorsly-barbed awns.

Identification Notes:

The undivided leaves and large flowering heads with prominent ray flowers readily separates Bidens cernua from the other species of Bidens.

Accepted Name:
Bidens cernua L.
Publication: Sp. Pl. 2: 832. 1753.

Synonyms & Misapplications:
Bidens cernua L. var. cernua
Bidens cernua L. var. elliptica Wiegand
Bidens cernua L. var. minima (Huds.) Pursh
Additional Resources:

PNW Herbaria: Specimen records of Bidens cernua in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Bidens cernua checklist entry.

E-Flora BC: Bidens cernua atlas page.

CalPhotos: Bidens cernua photos.

USDA Plants: Bidens cernua information.

50 photographs:
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