Heterotheca subaxillaris
Heterotheca subaxillaris, camphorweed, is a North American species of flowering plant in the aster family. It is widespread across much of the United States as well as Mexico and Belize.
Heterotheca subaxillaris is a perennial, aromatic herb up to 203 centimeters in height, often with several erect stems. The stems are hairy to bristly. The inflorescence 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.Chemistry
The leaf volatiles from which the name "camphorweed" is derived include camphor, but as a minor constituent ; of 41 documented volatiles, for example, caryophyllene, pinene, borneol, myrcene, and limonene each comprised over 5% of the total.
