20g] FLORA OF BOULDER, COLORADO 6l 



58. S. Lettermannii Vasey. Lettermann's porcupine grass. 

 Barren hilltops east of the Flat-irons, 5800 ft. (Daniels, 



184). 

 Wyoming to Idaho; Colorado to Utah. 



39. ORYZOPSIS Michx. Mountain rice. 



59. 0. micrantha (Trin. & Rupr.) Thurber. Small -flow- 

 ered mountain rice. 



Rocky soil on the mesas and foothills, 5700-8500 ft. (Dan- 

 iels, 269). 



Assiniboia to Montana; Nebraska to Arizona. 



40. EPJ0C0MA Nutt. 



60. E. cuspidata Nutt. [Oryzopsis cuspidata (Nutt.) Benth.]. 

 Silky mountain rice. 



Barren mesa near entrance to Bear Canon, 5800-6000 ft. 

 (Daniels, 765). 



Saskatchewan to Washington; Texas and Mexico to 

 California. 



41. MTJHLENBERGIA Schreb. Drop-seed grass. 



61. M. racemosa (Michx.) B. S. P. [M. glomerata Trin.]. 

 Marsh drop-seed grass. 



Canon on Green Mt. ; subalpine meadows at Eldora, 

 6000-10000 ft. (Daniels, 526). 



Newfoundland to British Columbia; New Jersey to 

 New Mexico. 



62. M. cuspidata (Torr.) Rydb. [Sporobolus cuspidatus 

 (Torr.) Woods]. Prairie rush-grass. 



Dry ledges, Gregory Canon, 6000 ft. (Daniels, 371). 

 Manitoba to Alberta; Missouri to Colorado. 



63. M. Richardsoni (Trin.) Rydb. [J 'Ufa Richardsoni. 

 Trin.; Sporobolus depauperatus Coulter in part]. Rich- 

 ardson's rush-grass. 



Subalpine meadows and open bogs, Eldora, 8600 ft. (Dan- 

 iels, 840). 



Anticosti to British Columbia; New Mexico to Cali- 

 fornia. 



