49 



a mere point to 1.5 cm. in length in the same spikelet; flowering gkimes, on a 

 short stipe, hnear-lanceolate; acnte, 8 to 10 mm. long, indistinctly 3 to 5 nerved, 

 scabrous and thinly hirsute, tipped with a stout, divergent, scabrous awn, 2 to 3 

 cm. long. Palea ecjualing or slightly shorter than the glume, bidentate, minutely 

 scabrous. 



This species is closely allied to E. canadensis, but is readily distinguished by the 

 more slender, open infloresence and the unequal and much reduced empty- 

 glumes. 



Type collected by T. A. Williams, Xo. 2653, in rich openings of the Bear Lodge 

 Mountains, Wyoming, July 23, 1897, altitude 6,000 feet. 



Specimexs EXAMINED. — Wisconsin: No locality, F. F. Wood. North Dakota : Turtle 



Fig. 25.—Elymus glabrifloms (Vas.) Scribn. & Ball: a, a single spikelet, showing the outerglumes; 



6, anterior view of a floret. 



Mountains, Bottineau County, 85 M. A. Brannon, July, 1896; Langdon, 150 M. 

 A. Brannon, July, 1896. Wyoming: W^elcome, 2679, 2681 T. A. Williams, July, 

 1897. 

 ELYMTJS GLABRIFLORUS (Vasey) n. comb. {E. canadensis var. glabrifloms 



Vasey, in Dewey, Contr. U. S. Nat. Herb. 2: 550 (1894). ) (Fig. 23. ) 

 A tall, stout, leafy i^erennial with large leaves and long, dense spike. Culms stout, 

 8613— No. 2J:— UU i 



