MANUAL CP TEE GRASSES OP THE UNITED STATES 251 



Figure 483.— Distribution of 

 Elymus flarescens. 



Figure 

 cens, X 

 cox 160, 



6. Elymus innovatus Beal. (Fig. 485.) Resembling E.jiavescens, ; 



spike rather dense, 5 to 12 cm long, the axis 



%i$ villous; spikelets 1 to 1.5 cm long, the narrow 



glumes and the lemmas densely purplish or gray- 



ish-villous, the lemmas with an awn mostly 1 to 



4 mm long. % — Open woods and gravelly 

 flats, Alaska to British Columbia; Montana, 

 Wyoming, and South Dakota (Black Hills). 



7. Elymus hirtiflorus 

 Hitchc. (Fig. 486.) 

 Culms erect, tufted, 40 to 

 90 cm tall, with slender 

 creeping rhizomes; blades 

 firm, flat or usually invo- 

 lute, glabrous beneath, 5 

 to 20 cm long, 1 to 4 mm 

 wide when flat; spike 



erect, 5 to 15 cm long; spikelets 4- to 6- 



flowered; glumes firm, hirsute, narrow, tapering 



into an awn about as long as the body, the 



entire length 1 to 1.5 cm; lemmas hirsute, some- 



482.— Elymus flaves- times sparingly so, the lower 8 to 9 mm long, 



adahoy rmandWiI "with an awn 5 to 10 mm long. % —River 



banks, Wyoming. 



8. Elymus triticoides Buckl. Beardless wild-rye. (Fig. 487.) 



Culms usually glaucous, rarely pubescent 

 below spike, 60 to 120 cm tall, commonly 

 in large colonies from extensively creeping 

 scaly rhizomes; ligule a truncate rim about 

 1 mm long; blades mostly 2 to 6 mm wide, 

 flat or soon involute; spike erect, slender to 

 rather dense, rarely 

 compound ; spikelets 

 mostly 12 to 20 mm 

 long; glumes very 

 narrow to subulate, 

 firm, nerveless or 1- to 

 3-nerved, awn-tipped, 



5 to 15 mm long, those 

 of the upper spikelets 

 usually reduced or 

 obsolete; lemmas 6 

 to 10 mm long, gla- 

 brous, firm, brownish, 

 purplish or tawny, 

 awn-tipped. Ql — 

 Moist or alkaline soil, 

 at low and medium 

 elevations, Montana 

 to Washington, south 



to western Texas and Baja California (fig. 

 488). Elymus triticoides var. pubescens 



and involute blades pubescent. QJ. —Oregon, 



Figure 485. — Elymus innovatus, X 

 1. (Hay ward 2719, S. Dak.) 



Figure 484.— Elymus 

 nicola, X 1. 

 Idaho.) 



are- 

 (Palmer 356, 



Hitchc. Sheaths 



