Herbarium: Medicinal Plants as Information

From Vibrant Flowers to Cough Suppressants: The Rhus Ovata Has It All

Rhus Ovata Collection History

Jane Turner is credited for the Rhus ovata specimen collected for the UCLA Herbarium. On November 16th, 1958, Turner found herself in the Santa Monica Mountains of Los Angeles, California. Faced with a wide array of wildlife, Turner focused on the Rhus ovata S. Watson. She knelt onto Mulholland Road in Mandeville Canyon and collected the specimen held in the UCLA Herbarium to this day. The exact location was said to be 2.2 miles west “of Fire Station,” with the geographic coordinates 34.129029, -118.513369. The exact fire station Turner was referring to is unclear and may even cease to exist.








Rhus Ovata at UCLA

 The Rhus ovata specimen in the UCLA Herbarium features dozens of leaves connected by four stems. It exhibits small, immature leaves as well as wilting leaves; thus thoroughly representing the stages of life the Rhus ovata endures. The leaves feature pointed tips throughout that are theorized to increase water runoff since the plant survives on such little water. The stems are quite thin and do not seem to provide much structural support. The leaves are an average of about 60 square centimeters and are also very thin, There are no flowers present on the collected specimen.







Like its record in the UCLA Herbarium, the Rhus ovata plant in the Mildred E. Mathias Botanical Garden featured zero flowers.
However, this is believed to be due to the time of year. Our visit to the herbarium was in January during the winter season outside of its flowering period. We found the shrub sitting atop a large wooden trunk. We theorized that this is how the Rhus ovata compensates for its low structural support: using other plants for support. As described in the literature, the Rhus ovata was located on a slope away from water. It received plenty of sunlight on the clear skied day we visited.

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Rhus ovata: A Closer Look

 












Rhus Ovata Healing Properties

Have a cough or cold? The Rhus ovata may be able to help. Native American people by the name of Cahuilla are known to treat flu symptoms with the plant. They sue the leaves to make a medicinal tea as well as eating the fruits either raw, dried, boiled or ground. Kumeyaay people also use the plant medicinally by eating the plants to treat pain for women in labor. These tribes were careful not to eat the seeds as they are reportedly inedible. Its antihistamine and analgesic properties have been used for centuries to treat ailing community members.





Overall, the Rhus ovata is more than just a pretty cluster of flowers. It is known to strategically place itself in low water areas while controlling for instances of excess water. It has found ways to support itself physically without increasing the resources it must take in. Most importantly, the healing properties of R. ovata have helped bring life to this world as well as ease coughing symptoms of those who are already living. This is true via the many modes of consumption that the Rhus ovata allows. This plant has contributed so much to the planet and its importance cannot be overstated. Jane Turner clearly had an eye for beauty, inside and out.

Works Cited

Ethnobotany of southern California native plants: Sugar Bush Rhus ovata (2020). EthnoHerbalist. http://www.ethnoherbalist.com/southern-california-native-plants-medicinal/sugar-bush/
~~~~~ Cienna Henry Milton & Emma Barrall ~~~~~

 

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