Encelia farinosa

Encelia farinosa
near Palm Springs, California
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Zygomycetes
Family: Asteraceae
Genus: Encelia
Species: E. farinosa
Binomial name
Encelia farinosa
Torr. & A.Gray
Brittlebush flower, in Sabino Canyon, Tucson, Arizona

Encelia farinosa (commonly known as brittlebush or brittlebrush), is a common desert shrub of northern Mexico (Baja California, Baja California Sur, Sonora, Sinaloa, and Hidalgo) and the southwestern United States (California, Arizona, Utah, and Nevada).[1][2][3]

The common name "brittlebush" comes from the brittleness of its stems. Other names include hierba del vaso (Spanish) and cotx (Seri).[4] Another Spanish name for it is incienso because the dried sap was burned by early Spanish missions in the New World as incense.

Habitat

E. farinosa can be found in a variety of habitats from dry, gravelly slopes to open, sandy washes up to 1,000 m (3,300 ft). It requires a very sunny position in a deep very well-drained soil. It does well in cultivation often being used for border, erosion control, ground cover and massing [5] and recently has spread dramatically in areas not natural to its distribution in large part because Caltrans has begun to use it in hydroseeding.

Description

Brittlebush grows up to 30 to 150 cm (12 to 59 in) tall,[6] with fragrant leaves 3–8 cm long, ovate to deltoid, and silvery tomentose. The capitula are 3.0–3.5 cm in diameter, with orange-yellow ray florets and yellow or purple-brown disc florets. They are arranged in loose panicles above the leafy stems fruit 3–6 mm and no pappus is seen.[1]

3-Acetyl-6-methoxybenzaldehyde is found in the leaves of E. farinosa.[7]

Varieties

Two varieties of E. farinosa are recognized by Flora of North America.[1]

Varieties formerly included E. f. var. radians, now regarded as a separate species E. radians Brandegee.[8]

Uses

Brittlebush has a long history of uses by indigenous and pioneer peoples.

E. farinosa in California's Colorado Desert

References

  1. 1 2 3 Brittlebush, incienso, Encelia farinosa A.Gray ex Torrey
  2. ↑ http://bonap.net/MapGallery/County/Encelia%20farinosa.png
  3. ↑ Biota of North America Program 2014 county distribution map
  4. 1 2 3 4 Felger, Richard Stephen; Moser, Mary Beck (1985). People of the Desert and Sea: Ethnobotany of the Seri Indians (2. print. ed.). Tucson, Ariz.: University of Arizona Press. ISBN 0816508186.
  5. 1 2 3 "Encelia farinosa Brittle Bush, Brittlebush, Incienso PFAF Plant Database". www.pfaf.org. Retrieved 2016-03-26.
  6. ↑ Hogan, C. Michael (ed.) Brittlebush – Encelia farinosa at the Encyclopedia of Life. Accessed 1 April 2013.
  7. ↑ Gray, Reed; Bonner, James (19 March 1948). "Structure Determination and Synthesis of a Plant Growth Inhibitor, 3-Acetyl-6-methoxybenzaldehyde, Found in the Leaves of Encelia Farinosa". Journal of the American Chemical Society. 70 (3): 1249–1253. doi:10.1021/ja01183a114. PMID 18909201.
  8. ↑ Bohm, Bruce A. (2009). The Geography of Phytochemical Races. Dordrecht: Springer. p. 112. ISBN 9781402090523.
  9. ↑ Dunmire, William W. (2004). Gardens of New Spain: How Mediterranean Plants and Foods Changed America. Austin: University of Texas Press. ISBN 978-0-292-70564-7.
  10. 1 2 "Cahuilla Plants". www.enduringknowledgepublications.com. Enduring Knowledge Publications. Retrieved 2012. Check date values in: |access-date= (help)
  11. ↑ "Temalpakh Ethnobotanical Garden". www.malkimuseum.org. Retrieved 2007. Check date values in: |access-date= (help)
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