HORDED 



665 



Pale and glaucous throughout; awns usually more slender. 



Massiichusetts, Cooky; Michigan, Wheehr; Texas, yealley. 



14. E. glaucuB. Viir. tenuis Vascy, Contrib. U. S. Nat. Herb, 

 1:280(1893). E. Sihiricus Hook. Fl. Bor. Am. 2:255(1840), 

 not L. E. Aniericanns V. & S. Macoun, Cat. Can. Pt. 4, 245 

 (1888). E. Sibiriciis var. Americamis Wats. & Coult. A. Gray, 

 Man. Ed. G, 673 (1890). 



Smooth tlironghout excepting the 

 awns, or scabrous, or culms and leaves 

 puberulent, rather slender, 60-100 cm. 

 high. Leaves 4 in number, shcatlis three- 

 fourths as long as the internodes; ligule 

 very sliort; blades flat, 15-25 cm. long, 

 7-10 mm. wide. Spikes exsorted, 5-18 

 cm. long, erect or nodding. Spikelets in 

 pairs, sometimes single, 2-6-flowcred; 

 empty glumes about 8 mm. long, linear- 

 lanceohite, 3-5-nerved, with an awn 3-35 

 Bnm. long; floral glume rough, firm, 10 



mm. long, with an awn 1-3 cm. long. ForFio. 124 — 7?Z//to«« glavcua. 



, , . A. spiktlet ; b, empty glume, 



some years supposed by American au- (liichurdsou.) 



thors to be E, Sihiricus Jj. 



Washington, IToiveU, E. C. Smith; Oregon, Howell, CiisicJc: 

 southern California, Pariah. Very variable. 



Lake Superior to the Pacific Coast. 



15. E. striatus Willd. Sj). PI. 1 : 470 (1797). E. striatus vil- 

 lostis A. Gray, Man. 1 : 603 (1848). 



Plant usually more or le.-<3 pubescent. Culms slender, 30-GO 

 cm. high, often not over 0.7 mm. diam. just below the spike. 

 Leaves 5-C in number, sheaths about as long as the internodes, 

 unsymnu'trically auriculate ; ligule very sliort ; blades scabrous, 

 flat, 15-18 cm. long, 5-12 mm. wide. Spike dense, often 

 nodding, 5-10 cm. long. Spikelets usually in pairs, 2-3- 

 flowered ; empty glumes awl-shaped, 1-4 nerved, twice as long 

 as the florets and half as wide as the floral glunu^, which is 6-7 mm. 

 long, not including the slender awn 1-3 cm. l<»ng. 



