205 



Fig. 501. Bouteloua piostrata Lag. ^'a^iod. Ciene. 2' : 141. 

 180,5. Tufted Grama. A slender, tufted :iiituial, 1 to 2 dm. hi5>h, 

 with slioit, narrow leaves and solitary, eiirved, tci iiiiiiiil Hjiikes 

 1..^ to 2 cm. lonj^. Spikclets with \ ery uiieiiiial, ghihrous empty 

 flumes (a), tlie 8eeon<l aliout I mm. loiiy, and hnuidly olilong, 

 3-lohed and 3-awncd Mowerin;; glumes which arc pubescent on 

 the hack below. Common on bottom lands, New ilexico, Colo- 

 rado, and (?) Arizona. [Mexico.] .Iiine-Octobcr. 



