Page author: Don Knoke
Bidens tripartita
three lobed beggarticks
WTU specimens
Other herbaria

Distribution: Introduced in most of the United States, but uncommon in our area.

Habitat: Wet waste places, primarily at low elevtions.

Flowers: August - October

Origin: Introduced

Conservation Status: Not of concern


Annual, nearly glabrous throughout, 1-20 dm. tall.


Leaves simple (but appearing trifoliate), sharply serrate, usually deeply divided into 3 narrow lobes, the center one larger and wider, 3-15 cm. long.


Heads erect, rayless, or occasionally with rays up to 4 mm. long; outer involucral bracts 4-9, herbaceous, enlarged and leafy.


Achenes wedge-shaped, flat or compressed-quadrangular, brown or blackish to purplish, with persistent pappus of 2-4 awns.

Identification Notes:

The winged petioles of Bidens tripartita should separate it from the very similar B. frondosa.

Accepted Name:
Bidens tripartita L.
Publication: Sp. Pl. 2: 831. 1753. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Bidens tripartita checklist entry.

E-Flora BC: Bidens tripartita atlas page.

CalPhotos: Bidens tripartita photos.

USDA Plants: Bidens tripartita information.

13 photographs:
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