776 GRAMINEE AGROPYRON 
HORDEUM 
volute, 4-7 inches long, 2-3 lines wide, those of sterile shoots narrower and 
sometimes half as long as the stems: spikes 3-7 inches long; spikelets 6-12 
lines long, 7-13-flowered: empty glumes lanceolate, acuminate or awn-poin- 
ted, scabrous on the nerves: flowering glumes 4-6 lines long, narrowly 
lanceolate, acute to awn-pointed, rounded on the back; smooth or thinly 
pubescent. In meadows, Oregon to Brit. Columbia and Minnesota. 
_. Var. molle Scribn. & Smith 1, c. Glumes and rachis more or less 
villous-pubescent. Washington to the Saskatchewan and New Mexico. 
A. Elmeri Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11, 54. Stems 
erect 3-5 feet high, from strong creeping rootstocks: sheaths smooth, the 
lower ones longer than the internodes ligules short, minutely fringed along 
the edge: leaves 6-I2 inches long, 2-6 lines wide, strigose, scabrous above, 
smooth beneath, long attenuate-pointed spikelets 6-10-flowered : empty 
glumes lanceolate, very acute or subaristate, rigid, about 1 line long, 3- 
nerved, scabrous on the nerves: flowering glumes broadly lanceolate, sharp- - 
ly acuminate, 5-nerved, short-pubescent on the back. On sandy banks of 
Snake river, Washington. 
A. dasystachyum var. subvillosum Scribn, & Smith |. c. 33. More 
or less glabrous: stems slender 2-4 feet high: sheaths nearly as long as the 
internodes: ligules a mere ring: leaves of sterile shoots 14-4 as long as 
the stems: spikes 5-7-flowered: empty glumes ovate-lanceolate acute to 
acuminate: flowering glumes 3-5 lines long, pubescent tolanate. Eastern 
Washington to Montana and Colorado. 
A. lanceolatum Scribn. & Smith 1. c. 34. Pale yellowish-green o1 
glaucous: stems 2-3 feet high: sheaths somewhat inflated, shorter than 
the internodes: ligules very short; leaves 6-12 inches long, about 2 lines 
wide, scabrous beneath and on the margins; pubescent to thinly hirsute 
above; spikes 4-6 inches long; spikelets 5-10 lines long, 4~-7-flowered ; 
empty glumes unequal, narrowly lanceolate, or oblanceolate, acuminate, 
3-4 lines long, 3-5-nerved; scabrous on the nerves; flowering glumes. 4-7 
lines long, broadly lanceolate, acute, mucronate, truncate or bidentate, 
rounded on the back, more or less pubescent, 3-nerved and scabrous toward 
the apex. Eastern Oregon and Washington to Idaho. 
A. pseudorepens Scribn. & Smith l. c. 34. Stems 1-3 feet high, erect 
or ascending from a geniculate base: sheaths glabrous, shorter than the 
internodes ; ligules 1 line long or less; leaves scabrous throughout, 4-8 inch- 
es long, 1-3 lines wide; spikes 3-8 inches long: spikelets 3-7 flowered, 
8-9 lines long, erect, and appressed: empty glumes linear-lanceolate acu- 
minate or awn-pointed, 5-nerved, scabrous on the nerves and scarious- 
margined; flowering glumes linear-oblong, acuminate, rounded on the back, 
5-nerved, scabrous.. Washington to Brit. Columbia, Nebraska and Texas, 
Var. magnum Ccribn. & Smith 1. c. 35. Robust, 3-4 feet high: 
leaves 8-22 inches long: spikes 6-8 inches long, one-side; spikelets crowded, 
acute, aninch long. Idaho to Montana and Colorado. , 
A. Repens Beauv. Agrost. 146. Stems 1-4 feet high, from long runn- 
ing jointed rootstocks: sheaths usually shorter than the internodes, gJab- 
rous: leaves 3-12 inches long, 1-5 lines wide, smooth beneath, scabrous 
above: spikes 2-8 inches long, strict: spikelets 3-7-flowered: empty glumes 
strongly 5-7-nerved, usually acute, or awn-pointed: flowering glumes 
acute or short-awned. Naturalized from Europe. ° 
_ 538 HORDEUM L, Sp. 84. 
Annual or perennial grasses with flat leaves and terminal 
cylindrical spikes. Spikelets 1-flowered, usually in threes at 
each joint of the rachis, the lateral generally imperfect. Rachilla 
