MANUAL OF THE GRASSES OF THE UNITED STATES 371 



shire to Iowa, south to Virginia, Tennessee, and Texas (fig. 763). 



Figure 757. — Muhlenbergia arizonica. Plant, X 1; 

 glumes and floret, X 10. (Grifliths 3368, Ariz.) 



Figure 759. — Muhlenbergia glaucn. 

 Plant, X 1; glumes and floret, X 

 10. (Nealley 726, Tex.) 



Muhlenbergia sobolifera var. setigera Scribn. (Fig. 762, B.) 



Branching more freely in the 

 later stages; lemma with an 

 awn 1 to 3 mm long. Ql — 

 Dry woods, Arkansas and 

 Texas. 



23. Muhlenbergia tenui- 

 flora (Willd.) B.S.P. (Fig. 



Figure 760.— Distribution of 

 Muhlenbergia gtauca. 



764.) Similar to M. sobolifera 

 in habit; culms often more 

 robust; blades mostly 10 to 18 

 cm long and 6 to 10 mm 

 wide; panicles on the average 

 longer; culms retro rsely pu- 

 berulent at least around the 

 nodes; sheaths puberulent or scaberulous toward the summit; 



Figure 758.— Muhlenbergia dumosa. Plant, X 1; 

 glumes and floret, X 10. (Pringle, Ariz.) 



