225] FLORA OF BOULDER, COLORADO J7 



160. A. riparium S. & S. Riparian wheat grass. 



About ditches in the plains, 5400-5700 ft. (Daniels, 398). 

 Montana to Colorado. 



161. A. occidentale Scribn. Western wheat grass. 



On the plains, where it is very abundant; also sparingly 

 in mountain meadows, 5100-9500 ft. (Daniels, 402). Also 

 at Longmont (Rydberg). 



Manitoba to Saskatchewan and Oregon; Missouri to 

 Arizona. 



162. A. molle (S. & S.) Rydb. Soft wheat grass. 



On the plains, where it is especially characteristic of 

 alkaline flats, and in the drier mountain valleys, 5100- 

 9000 ft. (Daniels, 978). 



Saskatchewan to Washington and New Mexico. 



74. TEJTICUM L. Wheat. 



163. T. sativum vulgare (Vill.) Hack. [T. vulgare Vill.]. 

 Wheat. 



Adventitious along the railroad between Boulder and 

 Marshall, 5400 ft. (Daniels, 514). 

 Old World, thence to the New. 



75. KORDEUM L. Barley. 



164. H. jubatum L. Squirrel-tail grass. 



Common on the plains and in mountain canons ; a fre- 

 quent weed in waste places, 5100-11000 ft. (Daniels, 380). 



Ontario to Alaska; Missouri to California, thence 

 naturalized eastward. 



165. H. pusillum Nutt. Little barley. 



Abundant on the plains and mesas, and following the 

 roads into the mountain district, 51007000 ft. (Daniels, 

 203). 



Ontario to British Columbia; Florida to California. 



166. H. sativum hexastichon (L.) Hack. Six-rowed barley. 

 Adventitious along the railroad between Boulder and 



Mrshall, 5400 ft. (Daniels, 480). 

 Old World, thence to the New. 



