225] FLORA OF BOULDER, COLORADO ^J 



160. A. riparium S. & S. Riparl\n 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. iRoUe (S. & S.) Rydb. Soft wheat grass. 



On the plains, where it is especially characteristic of 

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

 9000 ft. (Daniels, 978). 



Saskatchewan to Washington and New Mexico. 



74. TRITICUM L. Whe.\t. 



163. T. sativTim vulgare (Vill.) Hack. [7. viilgare Vill.]. 

 Wheat. 



Adventitious along the railroad between Boulder and 

 Marshall, 5400 ft. (Daniels, 514). 

 Old World, thence to the Nev/. 



75. HORDEUML. 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, 5100-7000 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. 



