Gutierrezia microcephala
CA: San Bernardino Co., Mesquite
Mts, Sep 2006

Gutierrezia microcephala
NV: E slopes of Spring Mts., Cold Creek Rd.,
limestone rocky soil, Joshua Tree Wd., 5600 ft
Spjut 16141, 30 Sep 2007

Gutierrezia sarothrae
Intermediate to G. microcephala, Purshia-juniper wd E of Fillmore, UT, Sep 2007

Gutierrezia sarothrae
NM: Gila Natl. For., Oak-juniper-sumac wd., 6400 ft., Sep 2007

Gutierrezia sarothrae
NM: Near border with Mexico, 50 miles west of El Paso, mesquite-Gutierrezia scrubland,
4100 ft, 19 Oct 2007

Gutierrezia sarothrae
NV: E slopes of Spring Mts., Cold Creek Rd.,
limestone rocky soil, Joshua Tree Wd., 5000 ft
30 Sep 2007

Gutierrezia sarothrae
Clark Co., NV
Spjut & Adams 5223, Nov 1978

A protein active in SA was reportedly isolated from a sample of this species (Hartwell 1976).

Gutierrezia sarothrae
NV: Clark Co., between Nipton and
Searchlight, Sep 2006

Gutierrezia sphaerocephalum
Trans Pecos, TX
Spjut & Marin15139, Nov 2002

Gutierrezia sp.
Lyon Co., NV
Sep 2006

Dong X. P., C. T. Che and N. R. Farnsworth. Cytotoxic flavonols from Gutierrezia microcephala. 1987. J. Nat. Prod. 50(2): 337–338.