25 
MEA 
the innovations narrower and 6 to Y inches long. Axis of the spike flattened, 
scabrous or subeiliate along the (cud m about 1 line long. Empty glumes 
setaceous and awn-like, Mii 9 lines long, those of the lateral spike- 
lets slightly ex cceeding t e others; A glume of the central spikelets 
sessile, 5 lines long, broadly lanceolate, scabrous toward the apex, smooth below, 
| awned; awn about 5 lines long; palea about as long as the glume, scabrous on 
the keels above, prolongation of therachilla bristle-like, one-third to two-thirds 
as long as the palea. Flowering glume of the lateral spikelets pedicellate, 
about 3 lines long, lanceolate, pe eee or short-awned; palea a little 
shorter than the glumes; nsually there is a bristle-like prolongation of the 
rachilla behind the palea. The lateral spikelets are Nod stami inate orneuter, 
and are raised on curved parii nearly three-fourths of a line long. 
s from H. montanense, to which it is most closely ee in the shorter 
joints of the axis of the spike, longer pedicels, and the tetera spikelets and 
setaceous, awn-like, empty glumes, Taller and more erect than nodosum, 
with broader ere in nger spikes, and more completely developed lateral 
spikelets. Aleutian Islands and Alaska to Oregon ey Califor 
Hordeum montanense Scribn. in Beal, Grasses N. Am., II, 644. dii ed leafy bien- 
nial or perennial 2 to 3 feet high, with smooth ene scabrous leaves, and termi- 
nal spikes 2 to 3 inches long. Culms smooth and s vee d at the nodes, 
sheaths shorter than the 1 striate, smooth, or wermost papiros 
pubescent; ligule very short, scarious; leaf blade 2 to 4 178115 long, 2 to 3 lin 
wide, sharply acuminate pointed and somewhat pungent at the tips, with a ais. is- 
tinct cartilaginous line along the margins. Empty glumes all alike, linear- 
lanceolate, scabrous on the back, 6 to 10 lines long, including the slender an 
scabrous awns. Central spikelet of each cluster, usually 2-flowered, the pro- 
a short stipe; the first flowering glume about 5 lines long, lanceolate, scabrous 
near the apex, awned; awn 8 to 9 lines long, the second floret raised upon a 
slender internode of the rachilla, which is 1 to 14 lines long, the glume with its 
awn 6 to 7 lines long. Lateral spikelets nearly sessile, lo ed, similar to 
the central spikelet, excepting that the second floret is reduced to a small 
subulate-pointed glume about 2 lines in length. Montana, No. 430, Scribner 
At once distinguished from H. boreale by having the lateral Fui ian nearly 
sessile, s the first floret of the central spikelet raised upon a short stipe. 
: AGROPYRON. 
Analytical key to the species. 
r 1. Innovations intravagin al 
3 1. Sales the innovatious extravaginal 12 
2. e E the spike breaking up at maturity, the joints falling —— m. 
e0e0e0d%%%%%%/m n ARI IO a ᷣ d : 
8 e. ie: of t the spike eontinuous 
s. 3. 55 strongly eo ompressed, remote on the: rachis 4 
s 2. Spikelets subterete, approximate on the rach 8 
E 4. Empty glumes more than half as long as - — or equaling them 5 
4. Empty glumes half as long as the spikelet o: 6 : 
5. Flowering gu 8 or with a == straight slender awn..... A. parishii. 
5. Flowering glume with a stout divergent or flexuos n, equaling or Tonger, 
than the reci ; dae 
6. Spikelets erect i ; i > : ^ vaseyi. 
T 
6. Spikelet divergent 
