295 



FIG. 277. Poa arida Vasey; Brittonand Brown, 111. Fl., 1: 208. 

 Prairie Spear-grass. An erect, often rather rigid, stoloniferous 

 perennial 3 to 6 <lra. high, with flat or folded, sti ft" leaves and nar- 

 row, rather densely (lowered panicles 8 to 15 cm. long. Meadows 

 and low grounds, Northwest Territory to Kansas and Arizona. 

 April-August. 



