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

 2: 39. 1836. Feather Bunch-grass. — A slender or rather stoat, 

 caespitose, erect perennial 5 to 10 dm. bigh. with involute-pointed 



leaves and narrow, contracted panicles 1*2 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. Awa about 24 mm. louir. 

 finally separating from the glume. — Colorado to Montana and 

 westward. 



