A(iK()STII)K.E. 249 



lets subsessile or on short pedicels, empty glumes subequal, 1- 

 nerved, bristle-poiuted, nearly as long as the floral glume; floral 

 glume thinly pul)escent on the lower half, 3-nerved, 2.7 mm. long, 

 the awn 3-G mm. long. Fig. 82, Vol. I. p. 184. 



A very variable species. Low open woods. 



New York, Beal 47 ; Michigan, Clark 698 ; Iowa, Hitchcock. 



New England to the Eocky Mountains. 



Var. Californica Yasey, Coult. Bot. Gaz. 7:93 (1882). M. 

 ParisJtii Xasoy, Bull. Torr. Club, 13:53 (188G). 



Eays mostly single, the empty glumes rather exceeding the 

 floral glume without its awn. and in the same j^anicle are spikelets 

 in wliich the empty glumes including the awn are no longer than 

 the floral glume; awn of floral glume about 3 mm. long. 



This plant corresponds very well throughout with one collected 

 by the author at Union Springs, Cayuga County, N. Y., about 

 1865. 



California, Parish 1076, also for Nat. Mus. ; Arizona, Lemvion 

 for Nat. Herb. 



Var. gracilis Scribn. Trans. Kans. Acad. Sci. 9: 116 (1883-84). 



" It resembles somewliat M. monticola Buckl., butin tliat species 

 the empty glumes are much shorter than the floret, while in this 

 they nearly equal it (exclusive of the awn), as in M. sylvafica" 



Var. setarioides (Fourn.). M. setarioides Fourn. Hemsl. Biol. 

 Centr. Am. Bot. 3:542 (1880). 



Culms persistent and rooting; empty glumes slightly unequal, 

 1-nerved, 1-1.5 mm. long, awn of floral glume 5-10 mm. long; 

 otherwise like the species. 



Mexico, Botteri 70, 638, 698, ; Borgean 3662. 



Var. setiglumis S. Wats. Bot. King's Expd. 378 (1871). 



Culms shorter, blades 8-15 cm. long, 4-6 mm. wide; panicle 

 shorter; empty glumes two-thirds as long, but the awn longer, ex- 

 tending a little beyond the floret; floral glume scarcely pubescent. 



Agricul. College, Mich., in 1885-86. 



22. M. flavida Yasey, Contrib. F. S. Nat. Mus. 1:282 (1893). 



A slender rather soft annual. 30-50 cm. high, branching 

 throughout its length. Sheaths half as long as the internodes; 



