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 var. 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. 01 (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; 

 / P/d^ 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 799.— Muhlenbergia 

 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, rarely longer. % (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. 



