184 



lb 



Fig. 166. Aveaa mortoniana Scribn. ; Bot. Gaz., 21:133. 

 Morton's Oat-grass. — A densely csespitose, erect perennial 1 to 

 2.5 dm. high, with rather rigid leaves and narrow, simple pani- 

 cles of one- to two-flowered spikelets. — At 3,900 to 4,200 m. alti- 

 tude, mountains of Colorado. August. 



