Bidens tripartita - Alchetron, The Free Social Encyclopedia
Bidens frondosa (Devil's beggartick)
Bidens frondosa - Useful Temperate Plants
Bidens frondosa (beggar ticks) plant in bloom. MBGargiullo. roadside, Falmouth, MA. 9:14:2017 3 – An Ecological Manual of New York City Plants in Natural Areas