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Family Asteraceae

HAWAII - NATURALIZED

Bidens pilosa 

 

UH Manoa, Oahu

 

Koko Crater BG, Oahu

Koko Crater BG, Oahu

BEGGAR'S TICK

Ascending annual herb in disturbed areas.  An invasive species.  With or without 4 - 7 white ray florets 2 - 8 mm long.  Native to Tropical America.