382 POACE.E. 



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

 Trisetum flavescens. 

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

 base of tlie teeth 1 



a. Native ; awn starting near the middle and projecting 

 above its glume 2 



B. Crithe. Annual; S2:)ikelets heavy, hanging, each con- 

 taining no more than two fertile flowers, and often only 

 one, and the empty glumes 7-9-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. Cultivated for grain (d) 



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



e. Panicle spreading in all directions. . . . 6, 7, 8 

 e. Panicle 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). TriseHm pur- 

 purascens Torr. FL U. S. 1: 127 (1824). 



A smooth glabrous slender tufted perennial, 30-100 cm. high, 

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

 10-20 cm. long. Spikelets 1-1.5 cm. long, 3-6-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, 6-10 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, 2-toothed, keels short-ciliate. 



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

 Oakes ; Vermont, P r ingle ; Canada, Foivler, J. Macoun 2241; 

 Michigan, Farioell, Wood, Robhins, Beal, Clarh 2G26; Minnesota, 

 Sandherg; Rocky Mountains, Hall & Harbour 623; Yellowstone 

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

 Oregon, Hoivell. 



New England, New York, Micliigan and northwestward. 



