Heterotheca_subaxillaris

<i>Heterotheca subaxillaris</i>

Heterotheca subaxillaris

Species of flowering plant

Quick Facts Heterotheca subaxillaris, Conservation status ...

Heterotheca subaxillaris, known by the common name camphorweed,[2] is a North American species of flowering plant in the family Asteraceae.[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]

References

  1. [1]
    The Plant List, Heterotheca subaxillaris (Lam.) Britton & Rusby
  2. [2]
    USDA, NRCS (n.d.). "Heterotheca subaxillaris". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 21 July 2015.
  3. [3]
    Discover Life, Heterotheca subaxillaris (Lam. ) Britton &. Rusby, camphorweed
  4. [4]
    SEINet, Southwestern Biodiversity, Arizona chapter photos, description, partial distribution map
  5. [5]
    Biota of North America Program 2014 county distribution map
  6. [6]
    Flora of North America, Heterotheca subaxillaris (Lamarck) Britton & Rusby, 1887.
  7. [7]
    Lincoln, D.E., B.M. Lawrence. 1984. The volatile constituents of camphorweed, Heterotheca subaxillaris. Phytochemistry 23(4):933-934


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