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



times spreading, scabrous-puberulent below the nodes and the panicle, 



50 to 100 cm tall; sheaths smooth 

 or slightly scabrous, keeled; ligule 

 1 mm long, membranaceous, short- 

 ciliate; blades flat, 2 to 6 mm wide, 

 scabrous; panicle narrow, spikelike, 

 usually more or less lobed or inter- 

 rupted, grayish," silky, often purple- 

 tinged, 7 to 15 cm long; glumes 

 narrow, acuminate, ciliate-scabrous 

 on the keels, 3 to 4 mm long; 

 lemma 3 mm long, tapering into a 

 capillary awn 4 to 8 mm long, the 



Figure 775.— Distribution of 

 Muhlenbergia sylvatica. 



hairs at base of floret copious, nearly 

 as long as the body of the lemma. 

 Ql (M. comata Ben th.) — Meadows, 

 moist thickets, gravelly river beds, 

 and open ground, at medium alti- 

 tudes, Montana to eastern Wash- 

 ington, south to New Mexico and 

 central California (fig. 781). 



33. Muhlenbergia jonesii (Vasey) 

 Hitchc. (Fig. 782.) Perennial, 

 closely tufted; culms erect, 20 to 40 cm tall; leaves mostly basal, the 



Figure 774.— Muhlenbergia sylvatica. Plant, 

 1; glumes and floret, X 10. (Conant, Mass.) 



Figure 776.— Muhlenbergia foliosa. Plant, X 1; glumes and floret, X 10. (Deam 19225, Ind.) 



numerous lower sheaths finally flattened and loose; ligule 2 to 4 mm 

 long; blades subfiliform, involute, scabrous; 

 panicle narrow, 5 to 8 cm long, the branches 

 ascending, rather loosely flowered; spikelets 3 

 to 4 mm long ; glumes broad, scabrous-puberu- 

 lent, about one-third as long as the spikelet, 

 obtuse, often erose; lemma obscurely pubescent 

 below, tapering to an acuminate or awned tip. 

 % -Open ground, northeastern California. FlG TJISSK° n of 



34. Muhlenbergia montana (Nutt.) Hitchc. 

 Mountain muhly. (Fig. 783.) Perennial; culms densely tufted, erect, 



