Bidens tenuisecta (slimlobe beggarticks) is a North American species of flowering plant in the daisy family. It is native to northern Mexico (Chihuahua) and the western United States (Arizona, New Mexico, Colorado and Utah, with a few isolated populations in Texas and Idaho). There are also reports of populations in the northeastern United States (Massachusetts, New York, Maryland) but these are almost assuredly introductions.