Taxon  Report   9733    
Bidens pilosa  L.
Hairy beggarticks
Bidens pilosa
© 2015 Richard Spellenberg
Photos from
CalPhotos / Calflora
Bidens pilosa
© 2018 Ron Vanderhoff
Bidens pilosa
© 2011 Zoya Akulova
Bidens pilosa, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Bidens pilosa
© 2018 Ron Vanderhoff
Genus: Bidens
Communities: weed, characteristic of disturbed places, wetland-riparian

Arid West: Equally likely to occur in wetlands and non wetlands
Mountains, Valleys and Coast: Occurs usually in wetlands, occasionally in non wetlands

Habitat: disturbed

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTS: Bidens odorata
PLANTS: Bidens pilosa var. bimucronata
PLANTS: Bidens pilosa var. minor
. . .
More information about  Bidens pilosa
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on Google Images
Jepson eFlora

Records from the Consortium of California Herbaria


Search (Flora of North America)

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 16, 2019).