662 POACE.E. 



mm. long, empty glumes subulate, 12-15 mm. long, 0.5-0.7 mm. 

 wide; tlorul glume firm, obscurely S-nerved, 8-13 mm. long, tlie 

 short teeth une(iual, awn about 3 mm. loug; pulea as loug as its 

 glume. Grain about 7 mm. long. 



Type specimen, Colorado (Pen Gulch), Vascy in 1884; also 

 collected in Montana by Andvrmn in 1889. 



8. E. elymoidcB (Kafin.) Sweozy, Cat. Neb. PI. 15 (1891). 

 ^fjgilops Injstrix Nutt. (Jen. 1:86 (1818). Sifaniun elymoidcs 

 Ralin. Jour. Phys. 89:103(1819). B. Sitanion U. & S. Miint. 

 2 :436 (1824). 



Culms tufted, 10-60 cm. high. Leaves glabrous, scabrous, or 

 hirsute; sheaths of the culm 3-4 in number, longer than the inter- 

 nodes, the upper inflated; ligule a mere line; blades mostly flat, the 

 apex setaceously pungent, the upper one 3-5 cm. long, 3-3 mm. 

 wide. Spikes included at the base or on short pedicels, 5-15 cm. 

 long, easily breaking into pieces. Spikelets 2, sometimes 3, at each 

 joint of the rachis, 2-4-flowered; empty glumes single, or some or 

 all of them unequally divided to the base, extending insensibly into 

 stiff diverging awns 4-9 cm. long; floral glume 7-10 mm. long, sca- 

 brous, 5-nerved above, bearing an awn as^long as those of the empty 

 glumes, often with a short awn on either side of the apex; palea 

 entire, emargiiuite or bearing 3 short bristles. 



A very variable grass, concerning a collection of which General 

 Munro, as quoted by Dr. Thurber in S. Wats. liot. Calif., said: 

 "A valuable series, showing how many species and even genera 

 might be made out of this one." 



Colorado, Jones 531, Patterson 153, Lctterman '6S; Montana, 

 Anderson 'i'i,, Williams; Arizoim, Rusbi/, Tonmei/ '7*Jo, 797; Wash- 

 ington, Hoioell; California, Pringle, Orcntt. 



Kocky Mountains to Texas, California, and Mexico. 



9. E. Saundersii Vasey, liuU. Torr. Club, 11: 126 (1884). 

 This is closely related to £. cicmoidcs, of whicii it is perhaps 



only a variety. The leaves are a little longer, spikelets often only 

 one at a joint of the spike, empty glumes narrowly elliptical, with 

 a shorter awn, unequally divided at the apex. 

 Colorado, \'asey. 



