205 



Fig. 501. Bouteloua piostrata Lag. Varied. Cienc. 2^ : 141. 

 1805. Tufted Gra^nia. — A 8len<ler, tufted annual, 1 to 2 dm. high, 

 with short, narrow leaves and solitary, curved, terminal spikes 

 1.5 to 2 cm. long. Spikelets witli very unequal, glabrous empty 

 glumes (a), the second about 4 mm. long, and broadly oblong, 

 3-lobed and 3-awned flowering glumes which are pubescent on 

 the back below. — Common on bottom lauds, New Mexico, Colo- 

 rado, and (?) Arizona. [Mexico.] June-October. 



