GRAMINE^ 11 



2. ELYMUS. Wild Eye. 



Spikelets 2-6-flowered, in pairs, sessile, arranged alternately at 

 notches in a continuous rhachis; glumes rigid, forming awns. 

 Tufted perennials. 



1. E. canadensis, L. 



Spike exserted on a long stem above the somewhat coarse, either green or 

 glaucous leaves; spikelets not closely arranged on the rhachis; spike nodding 

 at maturity. A coarse, tufted, bearded grass very common in light soil and 

 in waste places, with spikes" somewhat resembling heads of rye. Man.- 

 Alta. 



3. ANDROPOGON. Beard Grass. 



Spikelets in pairs, one sessile and perfect, the other pediceled 

 and sterile, arranged at joints of the rhachis; bracts containing 

 perfect flowers awned. 



1. A. furcatus, Muhl. Fobked Beabd Grass. 



Stems^stout, in tufts, and branching above; leaves often hairy on the sur- 

 face near the base; racemes purplish; joints of the rhachis hairy. Dry 

 ground, fairly common, Man.-Alta. 



4. STIPA. Feather Grass. 



Spikelets 1-flowered; glumes sharp and narrow, often terminating 

 in a bristle; bract below the flower continued into a persistent awn, 

 abruptly bent and twisted. Coarse perennial grasses. 



1. S. comElta, TrilQ. and Rupr. , 

 Stem erect, simple; 6 in. to 3 ft. high; sheaths longer than the internodes, 



the upper inflated and often enclosing the base of the somewhat loose and^ 

 spreading panicle. Dry prairie, Alta. 



2. S. viridula, Trin. 



Stems erect, clustered, sometimes branched, 1-3 ft. high; sheaths shorter 

 than the internodes; panicle strict, erect, and rather densely flowered. 

 Prairie, Man.-Alta. 



5. BOUTELOUA. 



Spikelets 1 or 2-flowered, arranged in 2 rows along one side of the 

 rhachis which often projects; usually short-awned. Annual or 

 perennial grasses with flat leaves and conspicuous one-sided spikes. 



1. B. oligostachya, (Nutt.) Terr. 



Stems 6-18 in. high, simple, erect or ascending, smooth; sheaths shorter 

 than the internodes; spike 1-3 on a stem, each 1-2 in. long, sometimes 

 ' curved, the rhachis terminating in a point which is more or less hidden by the 

 crowded spikelets. Dry prairies, Man.-Alta. 



