FLOWERING PLANTS AND FERNS OF ARIZONA 897 



type of G. polyantha from near Tucson {A. and R. Nelson 1638). 

 Central coastal California to southern Arizona and Chihuahua. 



4. Gutierrezia microcephala (DC.) A. Gray, Amer. Acad. Arts and 



Sci. Mem. ser. 2, 4: 74. 1849. 



Brachyris microcephala DC, Prodr. 5: 313. 1836. 

 Gutierrezia jfilifolia Greene, Pittonia 4: 55. 1899. 



Navajo, Coconino, and eastern Mohave Counties, south and south- 

 east to Cochise County, 3,500 to 6,000 feet, August to October. 

 Texas to Idaho, south to Arizona and Coahuila. 



5. Gutierrezia sarothrae (Pursh) Britt. and Rusby, Ni Y. Acad. Sci. 



Trans. 7: 10. 1887. 



Solidago sarothrae Pursh, Fl. Amer. Sept. 540. 1814. 

 Gutierrezia juncea Greene, Pittonia 4: 56. 1899. 

 Gutierrezia linearis Rvdb., Torrey Bot. Club Bui. 31: 647. 

 1904. 



Apache County to Mohave County, south to Cochise and Pima 

 Counties, 2,800 to 7,000 feet, July to October. Saskatchewan to 

 Kansas, south to northern Mexico and Baja California. 



13. AMPHIPAPPUS. Chaffbush 



Low brandling shrub, white-barked; leaves alternate, obovate or 

 elliptic, small, entire; heads small, yellow, few-flowered, crowded in 

 small rounded terminal clusters; involucre graduated, the phyllaries 

 broad, blunt, dryish; rays 1 or 2, small ; disk flowers 3 to 6 ; ray achenes 

 hairy, their pappus of more or less united bristles, awns, or paleae; 

 disk achenes glabrous, their pappus of twisted hispidulous bristles 

 and narrow paleae. 



1. Amphipappus fremontii Torr. and Gray, Boston Soc. Nat. Hist 

 Proc. 1: 211. 1845. 



Amphiachyris fremontii A. Grav, Amer. Acad. Arts and Sci. 

 Proc. 8: 633. 1873. 



Beaver Dam, and Chloride to Boulder Dam (Mohave County), 

 1,800 to 2,300 feet, April and May. Southwestern Utah and north- 

 western Arizona to eastern California. 



14. ACAMPTOPAPPUS. Goldexhead 



Low branching shrub, white-barked; leaves alternate, spatulate 

 to nearly linear, small, entire; heads medium-sized, discoid, yellow; 

 involucre broad, graduated, the dry scarious-margined blunt phyllaries 

 with a greenish subapical spot; achenes turbinate, densely villous; 

 pappus of numerous narrowly linear paleae, some of the outer ones 

 narrower and setiform. 



1. Acamptopappus sphaerocephalus (Harv. and Gray) A. Grav, Amer. 

 Acad. Arts and Sci. Proc. 8: 634. 1873. 



Aplopappus {Acamptopappus) sphaerocephalus Harv. and Gray 

 in A. Gray, Amer. Acad. Arts and Sci. Mem. ser. 2. 4: 76. 

 1849. 



Northern Mohave County to Graham, Gila, Maricopa, and Pima 

 Counties, 900 to 4,500 feet, dry plains and mesas, April to October. 

 Southern Utah to central Arizona and southern California. 



