2Il] FLORA OF BOULDER, COLORADO 63 



71. A. occidentalis Scribn. [A. alpinus Coulter, not L.]. 

 WESTERN FOXTAIL. 



Above timber-line, Arapahoe Peak, 11000-11500 ft. (Dan- 

 iels, 942). 



ALBERTA to BRITISH COLUMBIA; COLORADO to UTAH. 



45. SPOROBOLTIS R. Br. DROPSEED. 



72. S. airoides Torr. HAIR-GRASS DROPSEED. 



Alkaline flats about Boulder lake, scarce, 5300 ft. (Dan- 

 iels, 731). 



NEBRASKA and TEXAS to CALIFORNIA. 



73. S. cryptandrus (Torr.) Gray. SAND DROPSEED. 

 Common on the plains, mesas, and grassy slopes of the 



foothills, 5100-8000 ft. (Daniels, 513). 



MASSACHUSETTS to WASHINGTON; PENNSYLVANIA to ARIZONA 

 and MEXICO. 



74. S. heterolepis Gray. NORTHERN DROPSEED. 



Common along the railroad between Boulder and Mar- 

 shall, 5400 ft. (Daniels, 518). 



QUEBEC to SASKATCHEWAN; PENNSYLVANIA to COLORADO. 



75. S. asperifolius (Nees & Meyen) Thurber. ROUGH DROP- 

 SEED. 



Common on the plains, 5100-5600 ft. (Daniels, 493). 

 ASSINIBOIA to BRITISH COLUMBIA; MISSOURI and TEXAS to 

 CALIFORNIA. 



46. POLYPOGON Desf. BEARD-GRASS. 



76. P. Monspeliensis (L.) Desf. DITCH FOXTAIL. 

 Common along irrigation ditches east of Boulder, 5100- 



5500 ft. (Daniels, 676). 



EUROPE and ASIA, thence to NORTH AMERICA. 



47. CINNA L. WOOD REED-GRASS. 



77. C. latifolia (Trev.) Griseb. [C. pendula Trin.]. SLENDER 



WOOD REED-GRASS. 



Deep canons in shade, frequent; in aspen bogs at Glacier 

 lake and Eldora, 5700-8600 ft. (Daniels, 987). 



