Bidens eatonii
Bidens eatonii is a North American species of flowering plant in the family Asteraceae. It is native to eastern Canada and the northeastern United States.
Bidens eatonii is an annual herb up to 150 cm tall. It produces as many as 3 flower heads containing yellow disc florets but usually no ray florets. The species grows mostly along the banks of estuaries and coastal salt marshes.