Status: Native
Synonyms:
Bidens odorata Cavanilles
Bidens pilosa Linnaeus var. radiata (Schultz-Bipontinus) Schultz-Bipontinus
Bidens alba (Linnaeus) de Candolle var. radiata (Schultz-Bipontinus) R.E. Ballard
Bidens pilosa is found along roadsides and ditches. It is an erect
annual with pinnately divided leaves. There are 5 or 6 white rays and a yellow disc.
The achenes are shaped like harpoons with two awns at the top. The two awns have
backward pointed barbs, while the body of the achene has forward pointing barbs.
Please click on an image for a larger file.
Bidens pilosa, photo Russ Kleinman, Bill Norris, Richard Felger, & the Asteraceae Workshop 2007, Pinos Altos Range, Pinos Altos, Sept. 5, 2007
Bidens pilosa, achenes with barbs pointed both ways, photo Russ Kleinman, Pinos Altos Range, Pinos Altos, Oct. 8, 2007
Bidens pilosa, inflorescence, photo Russ Kleinman, Pinos Altos Range, Pinos Altos, Oct. 5, 2008
Bidens pilosa, achenes, photo Russ Kleinman, Pinos Altos Range, Pinos Altos, Oct. 30, 2008
Bidens pilosa, micro of flower, photo Russ Kleinman, Pinos Altos Range, Pinos Altos, Oct. 30, 2008
Bidens pilosa, late in season leaf, photo Russ Kleinman, Pinos Altos Range, Pinos Altos, Oct. 30, 2008
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