225] FLORA OF BOULDER, COLORADO 77 



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. TKJTICUM L. WHEAT. 



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

 WHEAT. 



Adventitious along the railroad between Boulder and 

 Marshall, 5400 ft. (Daniels, 514). 

 OLD WORLD, thence to the NEW. 



75. HORDETJM 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, 5100-7000 ft. (Daniels, 

 203). 



ONTARIO to BRITISH COLUMBIA; FLORIDA to CALIFORNIA. 



1 66. 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. 



