MANUAL OF THE GRASSES OF THE UNITED STATES 



411 



Figure 585. — Muhlenbergia involuta. Panicle and lig- 

 ule, X 1; spikelet and floret, X 10. (Type.) 



or slightly scabrous, mostly overlap- 

 ping, the lower crowded, expanded, 

 somewhat papery; ligule firm, trun- 

 cate, 2 to 3 mm. long; blades scabrous, 

 elongate, involute, tapering into a 

 long slender point; panicle grayish or 



Figure 587. — Muhlenbergia rigens. Spikelet and floret, 

 X 10. (Type collection.) 



Figure 586. — Muhlenbergia emersleyi. Panicle, X 1; glumes and floret, X 10. (Wooton and Standley, N. Mex.) 



pale, slender, mostly spikelike, 20 to 

 60 cm. long or more, the lower 

 branches sometimes 5 to 10 cm. long; 

 spikelets 2.5 to 3.5 mm. long, the 

 glumes shorter than the lemma, from 

 acute to obtuse or somewhat erose, 



scabrous-puberulent, rarely faintly 

 3-nerved; lemma scaberulous, sparse- 

 ly pilose at base, 3-nerved toward the 

 narrowed summit, awnless. % 

 (Epicampes rigens Benth.) — Dry or 

 open ground, hillsides, gullies, and 



