Encelia

 Asteraceae

©The World Botanical Associates Web Page
Prepared by Richard W. Spjut
December 2004; August 2006, Dec 2007, Feb 2014

Encelia actoni
Table Mt., Mojave Desert, NV
May 2006

 

Encelia californica
Vizcaíno Desert, BCN
Feb 1980

 

Encelia farinosa
Dominant shrub, just south of
Joshua Tree Natl. Park, CA
Mar 2005

Encelia farinosa
Sheephole Mts, CA
Mar 2005

Encelia frutescens
CA: San Bernardino Co., sandy wash,
Amboy Rd near I-40, 19 Nov 2007
 

Encelia farinosa
Gulf Coast, BCN
Apr 1990
 

Encelia resinifera

Utah—Great Basin Desert. San Juan Co., Valley of the Gods, 4 mi north of jct of Hwys 163 and 261; 37º14'29.2", 109º48.57.1", 1368 m.  Red loam with shadscale, snakeweed and blackbrush. Richard Spjut & Susan Spjut 16316.  20 May 2008

 

Encelia ventorum
Vizcaíno Desert, BCN
Feb 1980

Encelia ventorum, which superficially resembles creosote (Larrea tridentata) in habit, is a major component of sand dune vegetation near Guerrero Negro, occurring with Sphaeralcea fulva.

 

Encelia virginensis
Mesquite Mts, Mojave Desert, CA
May 2006

Encelia virginensis
Mesquite Mts., Mojave Desert, CA
Apr 2005

 

Trees and Shrubs of Kern County (Sep 2012)

Encelia. Shrubs with branched stems, leafy on new growth; flower heads on long leafless scapes; involucral bracts in 2–3 ranks; flower heads with both ray and disk type flowers, or only disk flowers, the disk flowers yellow or purplish, ray flowers yellow and sterile. Fruit: diclesium, the achene (pericarpium) enclosed by receptacular bract, dispersing together. 13–14 species, southwestern North America to South America.  A sample of the aerial parts of Encelia californica, collected by Spjut in 1972, was active in the P-388 Leukemia assay, but no further investigation was made because the active agents were believed to be sesquiterpene lactones.

Peduncles (flower head stalks) branched. ...................... Encelia farinosa

Peduncles not branched.................................................... Encelia actoni

 

Encelia actoni Elmer 1905. Acton encelia, Mountain bush. Rounded shrubs to 1.5 m high and in diam; stems hairy at first, developing fissured bark with age, leaves heart-shaped to triangular and lobed near base; flowering Feb-Jul, ray and disc flowers yellow. Dry road margins, southwestern San Joaquin Valley to Cuyama Valley, western Mojave Desert.  Type from Acton, Los Angeles Co., CA. Kern Co.: “Common, on desert slopes and canyons and in the foothills around the valley from Granite Station to Tejon Canyon and in the canyons bordering the upper Cuyama Valley” (Twisselmann), 205–1,598 m (CCH).  The Kawaiisu and Tubatulabal applied root, or a leaf and flower decoction, as a wash for treating rheumatic pain (Moerman).

Encelia farinosa A. Gray ex Torrey 1848. Brittlebush.  A common shrub of the Sonoran desert but evidently once rare in Kern Co., reported from Indian Wells Steak House and Brewery along  Hwy 14 (CCH), and from Edwards Air-force Base (Moe); however, in recent years it appears that brittlebush has become relatively common along Hwy 14.  It is not clear whether the plants were introduced and spread or whether it has been planted multiple times over the years.  Also, reported on the Tejon Ranch Conservancy, apparently common (Encelia farinosa Shrubland Alliance of MCV2, Magney 2010). Type from vicinity of Carrizo Creek, San Diego and Imperial counties, CA.  Aerial parts chewed by Cahuilla for toothaches (Moerman).

Encelia frutescens (Simsia frutescens A. Gray 1859) A. Gray 1873.  Common shrub of the desert regions that might be expected in Kern Co.  Identified by the absence of ray flowers. A record in CCH reported from Bana (near Bakersfield), alt 800ft. Inyo County, appears to lack validity as to where it might have been collected. Type from Agua Caliente on the Gila (AZ).