780 GRAMINEA® SITANION 
tapering into an awn as long or longer than the body: flowering glumes 
4-7 lines long, nearly smooth to hirsute, bearing a slender scabrous awn, 
ae inches long. On river banks and bars, Oregon to Nova Scotia, Georgia 
and Texas. 
E. Capot-Mepus# L. Sp. 84. Stems slender 12-20 inches long, genic- 
ulate below: sheaths about equalling the internodes: ligules very short: 
leaves 2-3 inches long, involute: spike stout, 144-2 inches long, dense: spike- 
lets 1-2-flowered: empty glumes narrow, rough, spreading, about an inch 
long: flowering glumes hispid, 3-4 lines long, gradually tapering into an 
awn 2-24 inches long. Ondry prairies, southwestern Oregon: introduced 
from Europe. 
55 SITANION Raf. 
Tall annual or perennial grasses with usually flat leaves and 
terminal spikes. Spikelets 1- to several-flowered, sessile, usually in 
pairs in alternate notches of the pointed rachis. Empty glumes 
forming an apparent involucre to the cluster: glumes very long, 
often 2-parted to the base, the divisions unequal, 2-cleft and 
long-awned: flowering glumes long-awned, 2-toothed or 3-awned. 
Palets a little shorter than the glumes, 2-keeled. Stamens 3. 
Styles very short, distinct, with plumuse stigmas. Grain sparsely 
hairy at the summit, adherent to the palet. 
S. elymoides Raf. Journ. Phys. Ixxxix, 103. Elymus Sitanion Shultes. 
Stems simple smooth, 6-24 inches high: sheaths smooth to rough or hirsute, 
usually shorter than the internodes, the upper ones often inflated and 
enclosing the base of the spike: ligules short: leaves 2-7 inches long, 44-2 
lines wide, usually scabrous, sometimes hirsute, flat or involute; spike 2-6 
inches long: spikelets 1-5-flowered: empty glumes entire or dlyided, often 
to the base, the divisions subulate and bearing long unequal slender awns: 
flowering glumes 3-5 lines long, 5-nerved, scabrous toward the apex, bear- 
ing a long slender divergent awn 1-3 inches long. In dry soil, California to 
Brit. Columbia and Kansas. 
S. glaber J. G. Smith. Stems stout, erect, densely cespitose, 12-20 
inches high: sheaths loose, longer than the internodes, glabrous: leaves 
2-6 inches long, glabrous beneath: spikes 2-4 inches long, barely exserted : 
awns of the flowering glumes 2-24 inches long. Washington to California. 
__§. villosum J. G. Smith. Stems stout, mostly erect, 10-15 inches high: 
sheaths densely hirsute: leaves short, flat, strigose-pubescent and some- 
what hirsute: spike 3-4 inches long, enclosed in the upper sheath: empty 
glumes 8-8-parted, each part bearing a slendér awn 2-4 inches long; flow- 
ering glume lanceolate, 3-awned, the middle awn stout, 4-5 inches long, 
the lateral ones slender and usually shorter. Commonin dry ground 
about Pullman, Washington. 
S. Leckenbyi Piper Fl. Palouse Reg. 32. Stems stout, erect, 244-3 
feet high: sheaths glabrous vr on sterile shoots ciliate: leaves stiff, erect, 
- 2-7 inches long, involute glabrous beneath, strigose above, sharply acu- 
minate: spike 5-7 inches long, slender,usually erect, long-exserted : empty 
glumes 4, equal, 244-3 lines long, entire, setaceous: flowering glumes lan- 
ceolate, 5-6 lines long, smooth, at base, scabrous above, bifid at the apex 
and tipped with a straight awn 144-2-inches long. Bars of Snake river at 
Wawawai, Washington. 
S. flexuosum Piper l.c. Stems tufted 144-3 feet high, erect: sheaths 
glabrous or on sterile shoots villous: leaves 2-6 inches long, involute, 
strigose-pubescent on both sides, or the upper nearly smooth: spike slender, 
erect, 4 inches long, long-exserted: empty glumes subulate-setaceous, 1-2- 
