386 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Indiana and Kansas, south to Florida and Texas; West Indies, 

 eastern Mexico (fig. 803). 



MUHLENBERGIA CAPiLLARis yar. FiLiPES (M. A. Curtis) Chapm. 

 Culms stouter; blades mostly involute; glumes with delicate awns, 

 mostly longer than the lemma; lemma with a delicate setaceous 

 tooth each side of the awn. 91 (M. filipes M. A. Curtis.) Moist 

 pine barrens near the coast, North Carolina, Florida, Mississippi, 

 and Texas. 



49. Muhlenbergia expansa (DC.) Trin. (Fig. 804.) Resembling 

 M. capillaris, in denser tufts, the old basal sheaths forming a curly fib- 

 rous mass; blades 



.'/// - / ^^ narrow, flat, be- 



coming involute ; 

 panicle relatively 

 smaller, narrower, 

 the capillary 

 branches and 

 branchlets mostly 

 straight; spikelets 



FIGURE 798. Muhlenbergia setifolia. Plant, X 1; glumes and floret, X 10- 

 (Hitchcock 13507, N.Mex.) 



FIGURE IW.Muhleribcrgia 

 dubia. Plant, X 1; glumes 

 and floret, X 10. (Hitch- 

 cock 3775, N.Mex.) 



3.5 to 5 mm long, the glumes one-third to two-thirds as long, acute 

 to acuminate; lemma scaberulous, nearly glabrous at base, awnless 

 or with an awn as much as 2 mm long, Varely longer. 01 (M. tri- 

 chopodes Chapm.) Moist pine barrens near the coast, North Caro- 

 lina to Florida and Texas (fig. 805). 



50. Muhlenbergia reverchoni Vasey and Scribn. (Fig. 806.) 

 Resembling M. expansa] culms more slender, foliage finer; glumes less 

 than half as long as the lemma, subacute or erose; lemma with an 

 awn 2 to 5 mm long. 21 Rocky prairies, Texas, 



