MANUAL OF THE GRASSES OF THE UNITED STATES 



453 



long; lemma 7 to 8 mm long, the awns about 2 cm long. 01 (A. 

 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. 2J. Dry plains and hills, 

 Texas, 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 



