AdHOSTIDE.E. 249 



lots subsessile or ou short pedicels, einjjty glumes subeqiuil, 1- 

 nerved, bristle-iioiuted, ncurly as long as the floral glume; tloral 

 ^lume thinly pubescent on the lower half, 3-nerved, 2.7 mm, long, 

 the awn 3-6 mm. long. Fig. 82, Vol. I. p. 184. 



A very variable s})ecies. Low open woods. 



Xew York, Beal 47 : Michigan, Chirk (idS; Iowa, Hitchcock. 



New England to the Kocky Mountains. 



Var. Californica Vasey, Coult. Bot. (iaz. 7:93 (188-.»). M. 

 rarishiiXimy, liull. Torr. Clul), 13:53 (1880). 



JJays mostly single, the empty glumes ratlier exceeding the 

 floral glume without its awn. and in the same panicle are s])ikek't3 

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

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



'J'his plant corresponds very well throughout with one collected 

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

 18(35. 



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

 for Nat. Herb. 



Yar. gracilis Scribn. Trans. Kans. Acad. Sci. D: 116 (1883-8i). 



"It resembles somewhat M.monticoht liuckl., butin that species 

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

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



Yar. setarioides (Fourn.). .)/. setarioides Fourn. llemsl. liiol. 

 Centr. \m. Hot. 3:542 (1880). 



Culms persistent and rooting: empty glumes slightly unequal, 

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

 otherwise like the si-»ecies. 



Mexico, Botteri 70, 638. 098, ; Borgeau 3662. 



Yar. setiglumis S. Wats. l?ot. King's Exi)d. 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 188-5-86. 



23. M. flavida Vasey, Con trib. U. 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; 



