232 \ GRAMINEAE. 
6. Elymus condensatus Presl. Smooth Lyme-grass. (Fig. 538.) 
Elymus condensatus Presi, Reliq. Haenk. 1: 265. 1830. 
Culms 2°-10° 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’-1° long or more, 3//-12’’ wide, sca- 
brous, at least above; spike 4’-15’ 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, 
4%4//-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 Lyme- 
grass. Sea Lyme-grass. (Fig. 539.) 
Elymus arenarius I. Sp. Pl. 83. 1753. 
Culms 14°-8° 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/-1° long or more, 114//-5’’ wide, flat, or 
becoming inyolute, smooth beneath, rough above; 
spike 3/-10’ in length, usually strict; spikelets 3-6- 
flowered, frequently glaucous; empty scales 8//-14/’ 
long, 3-5-nerved, acuminate, more or less villous; 
flowering scales 8’’-10’’ 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.) 
Sttanion elymotdes Raf. Journ, Phys. 89: 103. 1819. 
Elymus Sitanion Schultes, Mant. 2: 426. 1824. 
Elymus elymoides Swezey, Neb. Fl. Pl. 15. 1891. 
Culms 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, 1!4’’-2/’ wide, often stiff and 
erect, usually rough, sometimes hirsute, flat or 
involute; spike 2’-6’ in length; spikelets 1-5-flow- 
ered; empty scales entire or divided, often to the 
base, the divisions awl-shaped and bearing long 
unequal slender awns, 1/—3'4’ in length; flowering 
scales 3’’-5’’ long, 5-nerved, scabrous, at least to- 
ward the apex, bearing a long slender divergent 
awn I/—3!4’ in length, the apex of the scale some- 
times 2-toothed, the teeth often produced into 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. 
