Bidens pilosa L.
Family: Asteraceae
Spanish needles
[Bidens odorata Cav.,  more]
Bidens pilosa image
Albert C. Perdeck  
Etymology: Bidens: derived from Latin bis, "twice," and dens, "tooth," hence meaning "2-toothed" and referring to the bristles on the achenes
Plants: annual forb
Conservation Status: Introduced - adventive
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