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



nodes as in M. sylvatica; blades numerous, short, narrow, appressed; 



panicles on the average shorter and narrower than in M. mexicana; 



spikelets about as in M. 

 mexicana but the lemma 

 glabrous. % — Low 

 woods, Maryland, Indi- 

 ana, Illinois, Missouri, 

 and Texas (fig. 773). 



28. Muhlenbergia syl- 

 vatica Torr. (Fig. 774.) 

 Resembling M . mexicana 

 in habit, the branches 



Figure 766.— Muhlenbergia brachyphylla. Plant, X 1; glumes 

 and floret, X 10. (V. H. Chase 3759, 111.) 



Figure 767.— Distribution of 

 Muhlenbergia brachyphylla. 



usually more slender 

 and lax ; culms retrorsely 

 scaberulous below the 

 nodes; panicles slender, 

 nodding, the branches 

 distant, appressed, over- 

 lapping, or the lower 

 scarcely so; glumes 

 lanceolate, rather ab- 

 ruptly acuminate or awn- 

 pointed, about 2 mm 

 long; lemma a little longer than the glumes, somewhat pilose 

 below, tapering into an awn 5 to 10 mm long. % (M. umbrosa 

 Scribn.) — Moist woods and thickets, Maine 

 to South Dakota, south to Alabama and 

 Texas; Arizona (fig. 775). Awns some- 

 times reduced or wanting. 



29. Muhlenbergia foliosa (Roem. and 

 Schult.) Trill. (Fig. 

 7 76.) Resembling M. 

 mexicana and M. 

 sylvatica in habit; 

 culms scaberulous 

 below the nodes; 

 panicles mostly ex- 

 serted, often rather 

 long-exserted, nar- 

 row, of numerous short appressed 

 densely flowered somewhat aggregate 

 branches; spikelets 2 to 3 mm long; 

 glumes narrow, attenuate into a short 

 awn, about as long as the acuminate to awn-tipped lemma, 

 the lemma long-pilose below. % — Moist thickets, low woods, 



Figure 769.— Distribution of 

 Muhlenbergia racemosa. 



Figure 768. — Muhlenbergia racemosa. 

 Plant, X 1; glumes and floret, X 

 10. (Macoun 26241, Ont.) 



