MANUAL OF THE GRASSES OF THE UNITED STATES 453 



(A. 



long; lemma 7 to 8 mm long, the awns about 2 cm long. % 

 micrantha Nash.) — Texas, New Mexico, and northern Mexico. 



25. Aristida wrightii Nash. (Fig. 973.) Perennial; culms tufted, 

 erect, 30 to 60 cm tall; sheaths villous at the throat and with a more 

 or less hispid or villous line across the collar; blades involute, curved or 

 flexuous; panicle erect, narrow, 15 to 20 cm long; first glume 6 to 7 mm 



Figure 971.— Distribution of 

 Aristida purpurea. 



Figure 970.— Aristida purpurea, X 1. (Bush 665, Tex.) 



long the second about twice as long; lemma 10 to 12 mm long; awns 

 nearly equal, about 2 cm long, divergent. % —Dry plains and hills, 

 lexas, Colorado, and Utah to southern California and central 

 Mexico (fig. 974) 



26. Aristida longiseta Steud. Red three-awn. (Fig. 975 ) Peren- 

 nial, often in large bunches; culms 20 to 30 cm tall; blades involute, 

 curved or flexuous, usually less than 15 cm long; panicle narrow, erect 



