221 



jb a, 



Fig. 203. Boutelouarothrockii Vasey. Rothhock's Grama. 

 A densely ca?spitose perennial, with erect, simple or sparingly 

 branched leafy culms 1.5 to 2 dm. high, and rive to nine more or less 

 spreading, densely flowered spikes 2 to 3 cm. long. Sandy plains, 

 mesas and foothills, Arizona. [Mexico.] August, September. 



