232 GRAMINEAE. 



6. Elymus condensatus Presl. Smooth Lyine-grass. (Fig. 538.) 



Elvmus condensatus Presl, Reliq. Haenk. i: 265. 1830. 



Culms 2-io tall, erect, simple, smooth and gla- 

 brous. Sheaths smooth and glabrous, the upper ones 

 shorter than the internodes; ligule 2 // -3 // long, trun- 

 cate; leaves 6'-i long or more, 3 // -i2 // wide, sca- 

 brous, at least above; spike 4 / -i5 / in length, usually 

 stout, strict, often interrupted below, sometimes com- 

 pound at the base; spikelets 3-6-flowered, 2-several at 

 each node of the rachis; empty scales awl-shaped, 

 4i^//_6'" long, i-nerved, usually rough; flowering 

 scales 4' '"5" long, generally awn-pointed, usually 

 rough, sometimes smooth. 



In wet saline situations, Alberta to British Columbia, 

 south to northwestern Nebraska, Arizona and California. 

 July-Aug. 



7. Elymus arenarius L. Downy Lynie- 

 grass. Sea Lyme-grass. (Fig. 539. ) 



Elymus arenarius L. Sp. PI. 83. 1753. 



Culms \%-S tall, erect, simple, usually softly pu- 

 bescent at the summit. Sheaths smooth and glabrous, 

 often glaucous, those at the base overlapping, the 

 upper shorter than the internodes; ligule very short; 

 leaves 3'-! long or more, i^"-5" wide, flat, or 

 becoming involute, smooth beneath, rough above; 

 spike 3 / -io / in length, usually strict; spikelets 3-6- 

 flowered, frequently glaucous; empty scales W-\\ f/ 

 l n g. 3~5-nerved, acuminate, more or less villous; 

 flowering scales 8 // -io // long, acute or awn-pointed, 

 5-7-nerved, usually very villous. 



On shores, Greenland and Labrador to the Northwest 

 Territory and Alaska, south to Maine, Lake Superior and 

 Washington. Also in Europe and Asia. Summer. 



8. Elymus elymoides (Raf.) Swezey. Long-bristled Wild Rye. (Fig. 540.) 



Sitanion elytnoides Raf. Journ. Phys. 89: 103. 1819. 

 Elymus Sitanion Schultes. Mant. 2: 426. 1824. 

 Elymus elymoides Swezey, Neb. Fl. PI. 15. 1891. 



Culuis 6'-2 tall, erect, simple, smooth, glabrous. 

 Sheaths smooth or rough, sometimes hirsute, usu- 

 ally overlapping, the upper one often inflated and 

 enclosing the base of the spike; ligule short; 

 leaves 2 / ~7 / long, ^"-2" wide, often stiff and 

 erect, usually rough, sometimes hirsute, flat or 

 involute; spike 2'-6' in length; spikelets i-5-flo\v- 

 ered; empty scales entire or divided, often to the 

 base, the divisions awl-shaped and bearing long 

 unequal slender awns, \'-^/t r in length; flowering 

 scales 5"-$" long, 5-nerved, scabrous, at least to- 

 ward the apex, bearing a long slender divergent 

 awn i / -3K / i" length, the apex of the scale some- 

 times 2-toothed, the teeth often produced iuto % short 

 awns; joints of the rachis separating at maturity. 

 In dry soil, South Dakota to Oregon, south to Kansas, Texas, Arizona and California. July-Aug. 





