HORDED. 



655 



Pale and glaucous throughout; awns usually more slentler. 

 Massachusetts, Cooley; Michigan, WJieelerj Texas, Nealley. 



14. E. glaucus. Yar. tenuis Vasey, Contrib. U. S. Nat. Herb. 

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

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

 (1888). E. Sibiricus var. Americanus Wats. & Coult. A. Gray, 

 Man. Ed. 6, 673 (1890). 



Smooth throughout excei^ting the 

 awns, or scabrous, or culms and leaves 

 puberulent, rather slender, 60-100 cm. 

 high. Leaves 4 iu number, slieaths three- 

 fourths as long as the internodes; ligule 

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

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

 cm. long, erect or nodding. Spikelets in 

 pairs, sometimes single, 2-6-flowered; 

 «mpty glumes about 8 mm. long, linear- 

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

 mm. long; floral glume rough, firm, 10 ^ , 



mm. long, with an awn 1-3 cm. long. For Fig. \2i.—Elymus glaucus. 

 T 1 . . yl.spikelet; ^, empty fflume. 



some years supposed by American au- (Richardson.) 



thors to be E. Sibiricus L. 



Washington, Hoivell, E. C. Smith; Oregon, Hoioell, Cusich; 

 southern California, Parish. Very variable. 



Lake Superior to the Pacific Coast. 



15. E. striatus Willd. Sp. PL 1:470 (1797). E. striatus vil- 

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



Plant usually more or less pubescent. Culms slender, 30-60 

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

 Leaves 5-6 in number, sheaths about as long as the internodes, 

 iinsymmetrically auriculate ; ligule very short ; 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 glume, which is 6-7 mm. 

 long, not including tlie slender awn 1-3 cm. long. 



