3b2 POACE.E. 



the way down tlie back ; may be looked for here. See 

 Trinefnm jUivesreiis. 

 a. Native; awn as long as its glume, starting near the 

 Inise of the tt'otli 1 



a. Native; awn starting near the middle and projecting 

 above its ghime 3 



B. Critlie. Annual; si)ikol('ts heavy, hanging, each con- 

 taining no more than two fertile llowers, and often only 

 one, and the empty glumes T-9-nerved. 



b. Not cultivated for grain or forage (c) 



c. Floral glume having two or more bristles. . . . 3, 4 



c. Floral glume not bristly-pointed 5 



b. Cultivatctl for grain (d) 



d. Floral glume firm, enclosing the grain (e) 



e. Panicle spreading in all directions. . . . G, 7, 8 

 e. I'anicle 1-sided 9 



d. Floral glume thin, not enclosing the grain; empty 

 glumes much shorter than the spikelet 10 



1. A. striata Michx. Fl. Bor. Am. 1:73 (1803). Tn'tietum jmr- 

 purascens Torr. Fl. U. S. 1: 137 (1834). 



A smooth glabrous slender tufted perennial. 30-100 cm. liigh. 

 Ligule short; blades narrow, not numerous. Panicle simple, loose, 

 10-30 cm. long. Spikelets 1-1.5 cm. long, 3-G-flowered; empty 

 glumes purple, lateral nerves obscure, first 3-nerved, 3-4 mm. long, 

 second 5-nerved, about 7 mm. long; rachilla smooth, except the 

 beards at the base of the florets; floral glume oval-lanceolate when 

 spread, 7-nerved, G-10 mm. long; awn slightly twisted and bent, 

 springing from near the base of the teeth, as long as its glume; 

 palea rather firm, 5-G mm. long, 3-toothed, keels short-ciliate. 



New Hampshire (White Mountains), D. C. Eaton, Faxon 15, 

 Oakes ; Vermont, Pringle ; Canada, Fowler, J. Macoun 3341; 

 Alichigan, Faricell, Wood, liobhins. Beat, Clark 3G2G; Minnesota, 

 Sandherg; Rocky Mountains, Hall &, Harhoiir G23; Yellowstone 

 Park, Tweedy; Montana, Williams, Canby & Scribner 371; 

 Oregon, Howell. 



New England, New York, Michigan and northwestward. 



