112 MINNESOTA BOTANICAL STUDIES. 



merely ridded or else inconspicuously 3 to 5 nerved, bristly 

 hairy at the tip, terminating in awns as long as the empty 

 glumes. 



North America: Minn., Dak. and Neb.; W. to Or.; S. to 

 Ark., Tex., N. M. and Cal. The typical habitat for this j)lant 

 is the arid plains of the west. 



Minnesota: Reported from near the southern boundary of 

 the state, probably local. 



Elymus mollis Trin. in Spreng. Neu. Entdeck. 2 : 72. 

 1821. Wild Rye. 



?E. arenarius Meet, in LinnjBa 5:61. 1830. 



Asia: Northern Siberia. 



North America: Northern and eastern British America, 

 Labr. ; S. to Me. and the St. Lawrence; W. to L. Superior and 

 the Saskatchewan. 



Minnesota: Reported from the northeastern part of the 

 state and the northern part of the Red River valley. 



Elymus sibiricus Linn. var. glaucus (Buckl.) Wild Rye. 



E. glaucus Buckl. in Proc. Acad. Philad. ii. 6:99. 1862. 



E. americanus Vas. and Scrib. ex. Mac. Cat. Can. PI. 2: 245. 1888. 



E. sibiricus Linn. var. americanus Wats, and Coult. Gray's 



Man. ed, vi. 673. 1890. 

 E. sibiricus AUCT. Plur. non Linn. 



Perennial; stems 5 to 10 dm. in length, erect; leaves 2 to 3 dm. 

 in length; sheaths smooth and glabrous, seldom somewhat 

 pubescent; blades 9 to 15 mm. broad, flat, smooth, or somewhat 

 scabrous above; inflorescence 5 to 20 cm. in length, 5 to 10 

 mm. thick, virgate, curved or slightly nodding; spikelets in pairs 

 3 to several flowered, closely appressed to the rachis; empty 

 glumes 8 to 12 mm. in length, lanceolate or linear-lanceolate, 3 

 to 5 nerved, smooth or somewhat roughened, the awns gener- 

 ally shorter than ihe glwaies; flowering glumes nearly as long, 

 5 nerved, rough or setulose, with erect capillary awns 10 to 25 

 mm. in length. 



North America: Ont., Lake Superior; W. to Wash, and B. 

 C.; S. to Minn., Idaho and Cal. 



Minnesota: Occurs sparingly along the northern border of 

 the state in the Red river valley. 



Elymus striatus Willd. Sp. 1 : 470. 1797. Wild Rye. 



E. villosus MuHL. Willd. Enum. 131. 1809. 



E. striatus Willd. var. villosus A. Gray. Man. Ed. v. 639. 1868. 



