126 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



June. Colorado and Nevada to Arizona and southern California; 

 southern South America. 



3. Stipa coronata Thurb. in S. Wats., Bofc. Calif. 2: 287. 1880. 

 Only a variety of this species, var. depauperata (M. E. Jones) 



Hitchc. (S. parishii var. depauperata M. E. Jones) is found in Arizona, 

 along Bright Angel Trail, Coconino County, growing in large clumps 

 on slopes, 5,000 feet (Hitchcock 13063), June to July. 



This variety, which ranges from Utah and Nevada to Arizona and 

 southern California, differs from the species in the once- rather than 

 twice-geniculate awn. Stipa coronata, excluding the variety, is con- 

 fined to the Coast Range of California from Monterey to Baja 

 California. 



4. Stipa pringlei Scribn. in Vasey, Contrib. U. S. Natl. Herbarium 3: 



54. 1892. 

 Coconino, Cochise, and Pima Counties, 5,000 to 8,000 feet, rocky, 

 mostly wooded, slopes, June to September. Texas to Arizona and 

 Chihuahua. 



5. Stipa comata Trin. and Rupr., Acad. St. Petersb. Mem. VI. Sci. 



Nat. 5 l : 75. 1842. 



Apache, Navajo, Coconino, and Pima Counties, 5,500 to 7,500 feet, 

 dry hills, open woods, and sandy soil, often with juniper, May to 

 August. Indiana to Yukon Territory, south to Texas, Arizona, and 

 California. 



The var. intermedia Scribn. and Tweedy, a form in which the third 

 segment of the awn is relatively short and straight, has been found in 

 Apache, Coconino, and Yavapai Counties. 



6. Stipa eminens Cav., Icon. PL 5: 42. 1799. 



Camp Grant, Graham County (Rothrock in 1874), rocky hills, 

 August to October. Texas to Arizona and central Mexico. 



7. Stipa lobata Swallen, Wash. Acad. Sci. Jour. 23: 199. 1933. 



On a rocky bank along Bright Angel Trail, Grand Canyon, Coconino 

 County (Silveus 1928). Western Texas to Arizona. 



8. Stipa scribneri Vasey, Torrey Bot, Club Bui. 11: 125. 1884. 

 Grand Canyon (Coconino County), dry, rocky banks along Bright 



Angel Trail (Hitchcock 10448)1 and Kaibab Trail to Roaring Springs 

 (Eastwood and Howell 991), 5,000 to 7,000 feet, May to September. 

 Colorado, Utah, New Mexico, and Arizona. 



9. Stipa arida M. E. Jones, Calif. Acad. Sci. Proc, ser. 2, 5: 725. 



1895. 

 Navajo and Coconino Counties, 5,000 to 7,000 feet, dry rocky hills 

 and canyons, May to June. Southwestern Colorado, Utah, and 

 northern Arizona. 



10. Stipa robusta Scribn., U. S. Dept. Agr., Div. Agrost. Bui. 5: 23. 



1897. 



Stipa vaseyi Scribn., ibid. Bui. 11: 46. 1898. 



Apache, Coconino, and Yavapai Counties, 6,000 to 8,000 feet, dry 

 plains, hills, and open woods, June to September. Colorado to 

 western Texas, Arizona, and northern Mexico. 



