MANUAL OF THE GRASSES OF THE UNITED STATES 379 



narrow, contracted, 5 to 10, sometimes to 15 cm long, the branches 

 appressed or slightly spreading; spikelets, excluding awns, about 3 

 mm long, the glumes about two-thirds as long, subacute to obtuse 

 and erose at tip ; lemma pubescent at base and on lower half of margin, 

 tapering into a delicate flexuous awn 1 to 2 cm long. % — Rocky 

 hills and canyons, western Texas to Arizona and central Mexico. 



Figure 78Z.—Muhlenbtrgia montana. Plant, X 1; glumes and floret, X 10. (Patterson 156, Colo.) 



39. Muhlenbergia parviglumis Vasey. (Fig. 789.) Perennial, with 

 the habit of M. monticola; blades on the average somewhat longer, 

 1 to 3 mm wide; spikelets as in M. monticola, but the glumes minute, 

 erose, subacute to truncate; lemma scaberulous only, tapering into a 

 delicate awn 2 to 4 cm long. QJ. — Canyons, Texas and northern 

 Mexico; Cuba. 



