Ericameria cooperi
Transverse Ranges, CA
Spjut 15437, June 2003

Ericameria cooperi
Mojave Desert near Mojave, CA
May 2005

Ericameria cuneata var. spathulata
CA: Inyo Co., Sierra Nevada,
Coyote Valley, Sep 2006

Ericameria laricifolia
Coronado NF, NM
Spjut & Marin 14547, Nov 2001

Ericameria linearifolia
AZ: Yavapai Co.: 23 mi NW of Wickenberg
Spjut 16137, Sep 2007

Ericameria linearifolia
S Sierra Nevada, Kern Co.
Piute Mt., CA, April 2005

Ericameria linearifolia
Kingston Range, Mojave Desert, CA
April 2005

Ericameria nauseosa
(synonym: Chrysothamnus nauseosus)
Owens Valley, CA
Nov 2003

Ericameria cf nauseosa
San Bernardino Co., Clark Mt., CA
Spjut & Marin 15722, May 2002

Ericameria nauseosa
CA: Mono Co.:  Conway Summit,
elev. 8150 ft; 30 Sep 2006

Ericameria nauseosa
NV: Esmeralda Co.:  Monte Cristo Range
elev. ~5000 ft; 29 Sep 2006

Ericameria nauseosa var. mohavensis
CA: Kern Co., just west of Walker Pass,
Hwy 178, elev. ~5,000 ft; 01 Oct 2006

Ericameria nauseosa
Owens Valley, SW of Bishop, CA;
with Artemisia tridentata, Coleogyne;
elev ~5,000 ft. 1 Oct 2006

Ericameria nauseosa var. oreophilus
AZ: Cochise Co., Nov. 2002, Spjut 15025

Ericameria nauseosa var. juncea
NV, Clark Co., near AZ state line, Sep 2007.
Plant mostly leafless, not yet in flower, appearing glabrous. In Kearney & Peebles, the key character calls for phyllaries in very distinct vertical rows as evident here, and  in FNA the stems are described as yellowish green, as opposed to "white" stems indicated for var. bigelovii.

Ericameria paniculata
CA: San Bernardino Co., I-15 near Clark Mt
Oct 2007

Ericameria paniculata
CA: San Bernardino Co., Kingston Road
Sep 2006

Ericameria teretifolia
Inyo Co., CA
Volcanic rock outcrops near Aberdeen
Sep 2006

Ericameria teretifolia
S Sierra Nevada, Kern Co.
CA, 1 Oct 2006

Ericameria teretifolia
Inyo NF, SW of Bishop,
Coyote Valley, CA; Sep 2006. 
 

Murilloa, J. I., R. Encarnación-Dimayuga,  J. Malmstrømb, C. Christophersenb and S. G. Franzblau.  2003. Antimycobacterial flavones from Haplopappus sonorensis. Fitoterapia 74(3): 226–230.  “Crude extracts of Haplopappus sonorensis (A. Gray) S.F. Blake (Asteraceae), showed activity against Mycobacterium tuberculosis H₃₇Rv. By assay-guided fractionation, 5-hydroxy-3,7,4′-trimethoxyflavone (1), 5,7-dihydroxy-3,4′-dimethoxyflavone (2) and 5,4′-dihydroxy-3,7-dimethoxyflavone (3) were identified as the antimycobacterial principles. Compound 2 was the most active compound. ”

Zhou G. X., E. M. Wijeratne, D. Bigelow, L. S. Pierson 3rd, H. D. vanEtten HD and A. A. Gunatilaka. 2004.  Aspochalasins I, J, and K: three new cytotoxic cytochalasans of Aspergillus flavipes from the rhizosphere of Ericameria laricifolia of the Sonoran Desert.  J. Nat. Prod. 2004 Mar;67(3):328–332. “Bioassay-guided fractionation of a cytotoxic EtOAc extract of Aspergillus flavipes occurring in the rhizosphere of Ericameria laricifolia resulted in the isolation of three new cytochalasans, namely, aspochalasins I (1), J (2), and K (3), and four known cytochalasans, aspochalasins C (4), D (5), and E (6) and TMC-169 (7). The structures of compounds 1-3 were established on the basis of extensive 1D and 2D NMR spectroscopic analysis. All compounds exhibited weak to moderate cytotoxicity against NCI-H460, MCF-7, and SF-268 cancer cell lines, but none showed significant selectivity.”