78 UNIVERSITY OF MISSOURI STUDIES [226 



76. SITANION Raf. Bristle grass. 



167. S. longifolium J. G. Smith. Long-leaved bristle grass. 

 Common on the foothills and mountain slopes, 6000-9000 



ft. (Daniels, 363). 



Nebraska to Nevada; Texas to Arizona. 



168. S. brevifolium J. G. Smith. Short-leaved bristle 

 grass. 



Abundant on the plains, and frequent on open mountain 

 slopes, 5100-10000 ft. (Daniels, 202). Also on the mountains 

 between Sunshine and Ward (Rydberg). 



Wyoming to Utah; Colorado to Arizona. 



77. ELYMUS L. Lyme grass. 



169. E. Canadensis L. Canadian wild rye. 



Common along ditches and streams both in and out of 

 shade, 5100-7000 ft. (Daniels, 357). 



Nova Scotia to Washington; Georgia to New Mexico. 



170. E. robustus S. & S. Stout wild rye. 



In swales along railroads and on stream-banks, 5100-6000 

 ft. (Daniels, 489). 



South Dakota to Idaho; Missouri to Colorado. 



171. E. brachystachys Scribn. & Ball. Slender wild rye. 

 Plains south of Boulder, 5400-5700 ft. (Daniels, 396). 

 Michigan to South Dakota; Texas to Utah and Mexico. 



172. E. Macounii Vasey. Macoun's wild rye. 



On the plains and in meadows on the foot-hills, 5100-7000 

 ft. (Daniels, 417), 



Manitoba and Saskatchewan to Alberta; New Mexico 

 to Utah. 



173. E. condensatus Presl. Smooth lyme grass. 



Dry meadows throughout, 5100-10000 ft. (Daniels, 961). 

 Alberta to British Columbia; New Mexico to Cali- 

 fornia. 



