Bidens lemmonii (Lemmon's beggarticks) is a North American species of flowering plant in the family Asteraceae. It is native to the southwestern United States (Arizona, New Mexico)Biota of North America Program 2014 county distribution map and Mexico (Sonora, Chihuahua, Durango, Sinaloa, Michoacán, Baja California, Baja California Sur).Consortium of Intermountain Herbaria, Bidens lemmonii A. Gray description, photos, distribution map
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.Flora of North America, Bidens lemmonii A.Gray
The species is named for John Gill Lemmon (1831 or 32-1908), husband of American botanist Sara Plummer Lemmon (1836–1923).Gray, Asa 1884. Synoptical Flora of North America 1(2): 297
References
External links SEINet, Southwestern Biodiversity, Arizona Chapter, Bidens lemmonii A. Gray