FLOWERING PLANTS AND FERNS OF ARIZONA 975 



1. Syntrichopappus fremontii A. Grav in Torr., U. S. Rpt. Expl. Miss. 

 Pacif. 4: 106. 1S57. 



Peach Springs to Oatman (Mohave County), 3,500 to 5,000 feet, 

 mesas and rocky slopes, March to June. Southern Utah and Nevada, 

 western Arizona, and southern California. 



89. SCHKUHRIA 



Slender branching annuals; leaves opposite or alternate, pinna tely 

 parted into filiform lobes, or entire; heads small, few-flowered, discoid 

 or with 1 ray; achenes obpyramidal, 4-angled; pappus of 8 scarious 

 paleae or squamellae. 



Key to the species 



1. Paleae of the pappus all very obtuse, subequal 1. S. wbightii. 



1. Paleae of the pappus, at least in part, awned (2). 



2. Paleae essentially equal in length, all usually short-awned_ 2. S. hopkirkia. 



2. Paleae very unequal, 4 of them short-awned, the others shorter and very 

 blunt 3. S. wislizexi. 



1. Schkuhria wrightii A. Gray, PI. Wright. 2: 95. 1853. 



Tetracarpum wrightii Rydb., North Amer. Fl. 34: 44. 1914. 



Cochise and Santa Cruz Counties, 4.300 to 6.000 feet, mesas and 

 slopes, August to October. Southwestern New Mexico, southeastern 

 Arizona, and northern Mexico. 



2. Schkuhria hopkirkia A. Gray, PI. Wright. 2: 94. 1853. 



Hopkirkia anthemoidea DC, Prodr. 5: 660. 1836. 



Schkuhria anthemoides (sic) Coult. in J. D. Smith, Enum. PI. 



Guat. 4: 93. 1895. Not Wedd., 1855-56. 

 Tetracarpum anthemoideum Rvdb., North Amer. Fl. 34: 45. 



1914. 



Chiricahua and Huachuca Mountains (Cochise County), about 

 5,500 feet, mesas and slopes, July to October. Southeastern Arizona 

 to southern Mexico. 



3. Schkuhria wislizeni A. Grav, Amer. Acad. Arts and Sci. Mem. 



ser. 2, 4: 96. 1849. 



Tetracarpum vAslizeni Rydb., North Amer. Fl. 34: 45. 1914. 



Chiricahua and Mule Mountains (Cochise County), about 6.000 

 feet, ridges and slopes, August and September. Southeastern Arizona 

 and Chihuahua. 



90. HYMEXOPAPPUS 95 



Tomentose herbs; leaves alternate, pinnatifid to dissected, or the 

 lowest leaves in one species entire, often all or most of them basal; 

 heads usually several, cymose, medium-sized, usually discoid, yellow 

 or white, in 1 species with conspicuous white rays; involucre of 6 to 

 12 equal, oblong or oval, scarious-margined phyllaries; achenes ob- 

 pyramidal, 4- or 5-angled, pubescent, often villous; pappus of 10 to 

 20 mostly obtuse scarious paleae or squamellae. 



The root of H. lugens is reported to be used by the Hopi as an emetic 

 and in treating toothache. 



65 Reference: Johnston. I. M. diagnoses and notes relating to the spebmatophytes uiikhv of 

 north America. Gray Herbarium Tontrih. 68: so-104. L923. (Seepp.95 - 



2^0744° — 42 62 



