Ambrosia dumosa (White Bursage)

3/4/17 Shaver's Valley, Eastern Riverside County, CA

12/10/05 Shaver's Valley, E. Riverside County, CA

4/3/17 Day use area off CA 190 between Stove Pipe Wells and Emigrant,
Death Valley National Park, Inyo County, CA

 4/3/17 Ricardo Campground, Red Rock Canyon State Park, Kern County, CA

 4/3/17 Ricardo Campground, Red Rock Canyon State Park, Kern County, CA

LIFE LIST NOTES:

COMMON NAME: White Bursage

SPECIES: Ambrosia dumosa

FAMILY: Asteraceae (Sunflower Family)

LIFE LIST DATE: 12/10/2005

LOCATION: Shaver's Valley, Eastern Riverside County, CA

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Treatment from Jepson eFlora:

NATIVE

Habit: Shrub 2--9 dm, rounded, much-branched; herbage softly canescent-strigose. 

Stem: stiff. 

Leaf: sessile or petiole to +- 1 cm; blade 0.5--4 cm, +- ovate, 1--3 × pinnately lobed or divided. 

Inflorescence: staminate and pistillate heads mixed along axis of spike- or raceme-like cluster; staminate heads 3--5 mm diam, phyllaries 5--8, canescent; pistillate heads 2-flowered. 

Fruit: bur 4--9 mm, +- spheric, golden to purple or brown, puberulent; spines 12--35, 2--4 mm, spiraled, flat, straight, sharp. 

Ecology: Creosote-bush scrub; 

Elevation: -80--1700 m. 

Bioregional Distribution: s SNE, W&I, D; 

Distribution Outside California: to southwestern Utah, Arizona, northwestern Mexico. 

Flowering Time: Dec--Jun 

Note:Hybridizes with A. salsola. 

Synonyms: Franseria dumosa A. Gray

Unabridged Note: Drought-deciduous.

eFlora Treatment Author: David J. Keil