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 

 /fir tm or sli S ntl y scabrous, keeled; ligule 

 w \M IIM,,!\\m 1 mm long, membranaceous, short- 



cilia te; 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 



FIGUKE 775. Distribution of 

 Muhlenbergia sylvatica. 



hairs at base of floret copious, nearly 

 as long as the body of the lemma. 

 91 (M. comata Benth.) 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, X 

 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. 

 QL -Open ground, northeastern California. 



34. Muhlenbergia montana (Nutt.) Hitchc. 

 MOUNTAIN MUHLY. (Fig. 783.) Perennial j culms densely tufted, erect, 



