Bidens lemmonii (Lemmon's beggarticks) is a North American species of flowering plant in the daisy family. It is native to the southwestern United States (Arizona, New Mexico) and Mexico (Sonora, Chihuahua, Durango, Sinaloa, Michoacán, Baja California, Baja California Sur). Bidens lemmonii is an annual herb up to 30 cm (12 inches) tall. It produces flower heads sometimes one at a time, sometimes in a group of several, each containing yellow disc florets and (usually) white ray florets. The species grows in wet seeps on rocky mountainsides.