252 



POACEAE 



12, Elymus glaucus Buckl. 

 Western Rye-grass. Fig. 600. 



Elvnuis glaucus Buckl. Proc. Acad. Phila. 1862: 99. 1863. 

 Hlymus iiitidus Vasey, Bull. Torrey Club 13: 120. 1886. 

 Elymus ainericanus Vasey and Scribn. ; Macoun, Cat. Can. PI. 



"4: 245. 1888. 

 ElvDius glaucus tenuis Vasey; Contr. U. S. Nat. Herb. 1: 280. 



'1893. 

 Elvuius glaucus breiiaristatus Davy in Tepson, Fl. West. Mid. 



"Calif. 79. 1901. 

 Elvnius glaucus tnaximus Davy in Tepson, Fl. West. Mid. Calif. 



"79. 1901. 

 Elymus angustifoUus Davy in Tepson, Fl. West. Mid. Calif. 



"80. 1901. 

 Elymus angustifoUus caespitosus Davy in Tepson, Fl. West. Mid. 



" Calif. 81. 1901. 



Culms erect, 60-120 cm. tall, without rhizomes : 

 sheaths smooth or scabrous ; blades flat, as much as 1 

 cm. wide, scabrous on both surfaces, sometimes narrow 

 and more or less involute ; spike erect, usually dense, 

 long-exserted, 5-15 cm. long, rarely longer; glumes 

 about as long as the spikelet, lanceolate, 8-15 mm. long, 

 acuminate or awn-pointed, with 2-4 scabrous nerves; 

 lemmas awned, the awn 1-2 times as long as the body. 



Open woods, copses, and dry hillsides in the Transition 



Zone; Alaska to the mountains of southern California, east to 



Michigan. June-Aug. Type locality: Columbia River. 



Elymus glaucus jepsoni Davy, in Jepson, Fl. West. Mid. Calif. 79. 1901. E. hispidulus Davy, loc. cit.; 



E. pubescens Davy, op. cit. 78. £. divergcns Davy, op. cit. 80. E. velutinus Scribn. & Merr. Bull. Torrey 



Club 29: 466. 1902. E. parishii Davy & Merr. Univ. Calif. Publ. Bot. 1: 58. 1902. Distinguished by the 



more or less pubescent sheaths and blades. Lemmas sometimes only awn-pointed. California. 



Elymus glaucus aristatus (Merr.) Hitchc. E. aristatus Merr. Rhodora 4: 147. 1902. Glumes narrow, 

 almost subulate; spike densely flowered. Mountains of Oregon and Washington. 



13. Elymus virginicus submiaticus Hook. 



601. 



Awnless Rye-grass. Fig. 



255. 



Elymus lirginicus submuticus Hook. Fl. Bor. Am. 2: 

 "1840. 



Elymus curzatus Piper, Bull. Torrey Club 30: 233. 1903. 



Culms erect or geniculate at base, about 1 

 meter tall, glabrous ; sheaths glabrous ; blades 

 flat, scabrous on both sides, 15-20 cm. long, 5-10 

 mm. wide ; spike erect, often Included at base 

 in the upper sheath, 10-12 cm. long ; glumes 

 rigid, lanceolate, thick, indurate and bowed out 

 at base, 3-5-nerved, scabrous, acuminate, 13-17 

 mm. long, often curved or twisted ; spikelets 

 mostly 3-flowered ; lemmas sparsely hispid above 

 the middle, 8-10 mm. long, awn-pointed, the awn 

 1-2 mm. long. 



Box Caiion. Pend Oreille River, Washington, east to 

 Ontario and Kansas. August. Type locality: Cumberland 

 House Fort, Saskatchewan River. 



14. Elymus canadensis L. 

 Canada Rye-grass. Fig. 602. 



Elymus canadensis L. Sp. PI. 83. 1753. 

 Siianion brodiei Piper, Erythea 7: 100. 1899. 



Culms tufted, erect, smooth, rather stout, 1-1.5 

 meters tall, sometimes lower; sheaths smooth or 

 scabrous ; blades flat, firm, scabrous above, smooth 

 or scabrous below, 15-30 cm. long, 5-15 mm. wide; 

 spike thick, nodding, usually interrupted below, 10- 

 20 cm. long, bristly with the numerous divergent 

 awns ; glumes narrow, somewhat indurate but not 

 definitely bowed out at base, about 3-nerved, sca- 

 l)rous, narrowed into an awn ; lemmas, scabrous- 

 pubescent, about 1 cm. long, narrowed into an awn 

 2-3 cm. long, divergent when dry. 



Moist places, copses, edges of woods, and rocky shaded 

 banks in the Arid Transition and Upper Sonoran Zones; 

 eastern Washington to northern California (Sonoma County, 

 Samuels), east to Nova Scotia and Florida. June-Aug. Type 

 locality: Canada. 



