Heterotheca subaxillaris, known by the common name camphorweed, is a North American species of flowering plant in the family Asteracea. It is widespread across much of the United States.
Heterotheca subaxillaris is a fall blooming perennial, aromatic herb up to 203 centimeters (80 inches or 6 2/3 feet) in height, often with several erect stems. The stems are hairy to bristly. The inflorescence i contains 3-180 flower heads in a flat-topped array. Each head contains 15–35 yellow ray florets surrounding 25–60 disc florets at the center. Its low growing ground cover, like foliage, produces flowers up to 3 feet that attract numerous insects and butterflies.