Heterotheca subaxillaris

Heterotheca subaxillaris
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Astereae
Genus:	Heterotheca
Species:	H. subaxillaris
Binomial name
	Heterotheca subaxillaris; (Lam.) Britton & Rusby 1887
Synonyms
	Synonymy Inula subaxillaris Lam. 1789 ; Calycium divaricatum Elliott ; Calycium scabrum Elliott ; Chrysopsis scabra (Pursh) Elliott ; Diplopappus scaber (Pursh) Hook. ; Heterotheca chrysopsidis DC. ; Heterotheca lamarckii Cass. ; Heterotheca scabra (Pursh) DC. ; Inula scabra Pursh ; Stelmanis scabra (Pursh) Raf. ;

Heterotheca subaxillaris, known by the common name camphorweed,^[2] is a North American species of flowering plant in the aster family.^[3] It is widespread across much of the United States (from California to Massachusetts) as well as Mexico and Belize.^[4]^[5]

Heterotheca subaxillaris is a 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 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.^[6]

Chemistry[]

The leaf volatiles from which the name "camphorweed" is derived include camphor, but as a minor constituent (less than 2%); of 41 documented volatiles, for example, caryophyllene, pinene, borneol, myrcene, and limonene each comprised over 5% of the total.^[7]