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



5. Sporobolus asper (Michx.) Kunth, Rev. Gram. 1: 68. 1829. 



Agrostis aspera Michx., Fl. Bor. Amer. 1: 52. 1803. 



South of Beklohito, Apache County, 6,000 feet, in red sandy loam 

 (Howell 56) . Vermont to Iowa, North Dakota, Utah, and Washington, 

 south to Louisiana and Arizona. 



6. Sporobolus interruptus Vasey, Torrey Bot. Club Bui. 15: 8. 1888. 

 Navajo, Coconino, and Yavapai Counties, 5,000 to 7,000 feet, dry 



rocky hillsides, July to September, type from near Flagstaff (Rusby 

 885) . Known only from Arizona. 



*7. Sporobolus pyramidatus (Lam.) Hitchc, U. S. Dept. Agr. Misc. 

 Pub. 243: 84'. 1936. 



Agrostis pyramidata Lam., Tabl. Encycl. 1: 161. 1791. 

 Sporobolus argutus (Nees) Kunth, Rev. Gram. 1, Sup. XVII. 

 1830. 



Arizona specimens previously referred to this species are S. pulmnatus 

 Swallen. Kansas and Colorado to Louisiana, Texas, southern Flor- 

 ida, and tropical America. 



8. Sporobolus flexuosus (Thurb.) Rydb., Torrey Bot. Club Bui. 32: 



601. 1905. 



Sporobolus cryptandrus y ox. flexuosus Thurb. in S. Wats., Bot. 

 Calif. 2: 269. 1880. 



Apache, Navajo, and Coconino Counties, 3,600 to 5,300 feet, dry or 

 moist, open sandy soil, June to October. Western Texas to southern 

 Utah, Arizona, southeastern California, and northern Mexico. 



9. Sporobolus cryptandrus (Torr.) A. Gray, Man. 576. 1848. 



Agrostis cryptandra Torr., Aim. Lye. N. Y. 1: 151. 1824. 



Apache County to Mohave County, south to Cochise and Pima 

 Counties, 1,200 to 6,500 feet, dry open sandy ground and rocky slopes, 

 April to September. Maine and Ontario to Alberta and Washington, 

 south to North Carolina, Indiana, Louisiana, Arizona, and Mexico. 



10. Sporobolus contractus Hitchc, Amer. Jour. Bot. 2: 303. 1915. 



Sporobolus cryptandrus var. strictus Scribn., Torrey Bot. Club 



Bui. 9: 103. 1882. 

 Sporobolus strictus (Scribn.) Merr., U. S. Dept. Agr., Div. Agrost. 



Cir. 32: 6. 1901. Not Franch., 1893. 



Apache County to Mohave County, south to Cochise and Pima 

 Counties, 1,400 to 5,500 feet, dry mesas, bluffs, and sandhills, August 

 to October, type from Camp Lowell, Pima County (Pringle) . Colorado 

 to Nevada, south to western Texas, Arizona, southeastern California, 

 and Sonora. 



11. Sporobolus giganteus Nash, Torrey Bot. Club Bui. 25: 88. 1898. 



Apache, Navajo, and Cochise Counties, 4,500 to 6,000 feet, dry open 

 ground, June to October. Western Texas to Arizona. 



