134 



Fig. 430. Stipa viridula Trin. Mem. Acad. St. Petersb. (VI.) 

 2:39. 1836. Fkather Bunch-gkass. A slender or rather stout, 

 cjespitose, erect perennial 5 to 10 dm. bii^^h, with involute-pointed 

 leaves and narrow, C()ntracte<l panicles 12 to 20 cm. long. Spike- 

 lets with nearly equal, subulate-pointed empty glumes 6 to 9 mm. 

 long, and hairy or pilose flowering glume, which is about 5 mm. 

 ^ong and has a short, obtuse callus. Awu about 24 mm. long, 

 finally separating from the glume. Colorado to Montana and 

 westward. 



