Herbarium: Medicinal Plants as Information

The Growth and Wilt of Artemisia californica

Artemisia californica, from the family Asteraceae, is a small shrub plant native to Southern California and Northern Baja California. Colloquially known as California sagebrush, the fragrant plant has small, needle-like leaves and delicate yellow flowers that grow together on strong, thick branches. These branches anchor the plant and help it grow in its characteristic rounded shape. It needs very little water and is considered a hearty plant that can withstand drought, cold, heat, and harsh sun without dying. Under optimal conditions, it can grow very quickly. While it typically is only three to four feet in height, it can be as short as one foot or as tall as eight feet in total.

In Materia Medica, the plant sample was collected by Melanie Howe in San Diego County in 1990. It was found with very little vegetation surrounding it, following burns in the area after a San Diego fire in the 1980s. The actual plant specimen was pressed, dried, and then preserved. This specific sample was inferred to be classified as the genus Artemisia and species Californica under the kingdom Plantae due to being found in the coastal region of San Diego County where it commonly grows and has appearances of sagebrush.

The comparable specimen in the UCLA Herbarium was collected by Arthur C. Gibson on July 25th, 2001 in Ventura, CA in the Santa Monica Mountains. It was taken from the Wildwood Regional Park along a service road going from Canyon Trail to Teepee Road. It was described as an aromatic shrub that first flowers in the early summer months. To provide context for the appearance of the plant, the physical metadata of the specimen indicates that the plant was collected in the summertime, in a harsher climate that contributes to the browned look of Artemisia Californica.

The Artemisia californica plant in the Botanical Garden was only about three and a half feet tall and seemed to appear wilted, most likely due to the fact that we viewed it outside of its natural blooming window, which takes place from April to October every year. It resembled the classic California sagebrush plant, with sparse, delicate flowers, small green needle leaves, and more of a silvery gray color overall during the winter. Its fragrant smell was still detectable, despite its near hibernating appearance.

This plant has several medicinal uses. Its leaves, seeds, and oils can be processed in various ways to treat pain. Its most notable active agent is eucalyptol, a monoterpenoid, which shows antinociceptive activity. Useful in mitigating the effects of rheumatoid arthritis, a liniment ointment is applied to aching joints. Although this treatment has been used by several Native American tribes for centuries, it has recently been put to the test in clinical research. In a 2013 study by the University of Southern California, all 42 patients given treatment containing California Sagebrush reported relief from moderate to severe pain within twenty minutes.

Artemisia californica is an understated but truly remarkable plant. Its contributions to our local ecosystem and its known medicinal properties as well as its potential drug benefits warrant a sustained research effort.

WORKS CITED

NielsenEditor-In-Chief, Lorin. “Types of Sage from Culinary to Colorful.” Epic Gardening, August 24, 2021. https://www.epicgardening.com/types-of-sage/.
“Sage.” Encyclopædia Britannica. Encyclopædia Britannica, inc. Accessed March 8, 2022. https://www.britannica.com/plant/sage-plant.
 
Howe, M. 1990. "Artemisia californica." Global Biodiversity Information Facility, CCDB-24908-A03.
.

This page has paths:

This page references: