Bidens cabopulmensis is a rare species of flowering plant in the daisy family. It is known only from the region in and near Cabo Pulmo National Park. This is in the State of Baja California Sur in western Mexico. Bidens cabopulmensis is an perennial herb up to 40 cm (16 inches) tall, generally branching only near the base. It produces one yellow flower heads per branch, each head containing both disc florets and ray florets. The species grows on coastal sand dunes.