742- GRAMINEZ® ALOPECURIS 
DANTHONIA 
A. Howellii Vasey Bull. Torr. Bot. Club, xv, 12. A low tufted an- 
nual, often purplish throughout: stems erect, or somewhat geniculate at 
base, mostly simple, smooth, 3-6 inches high: sheaths loose or vaginate, 
the upper one more inflated, smooth, the lower shorter than the inter- 
nodes, the upper one exceeding the internode, with a short blade: ligules 
membranous, obtuse, 1 line long: leaves filiform-convolute, exceeding the 
stem: panicle cylindric, 1 inch long, usually included at base: empty 
glumes slightly united at base, oblong, obtuse, carinate, scarious on the 
margins, ciliate on the keel and silky on the lateral nerves and near the 
base, 114-1% lines long: flowering glume broadly ovate oblong, truncate, 
thin, smooth, 4-nerved,-equalling the empty ones: awn arising below the 
middle of the glume, slender, naked below, bent, 3 lines long: palet want- 
ing. 381 ney of small pools that are dry in summer, on the rocky plains 
near Medford southern Oregon. 
A. occidentalis Scribn. Bot. Gaz. xi, 170. Stems rather slender, 2-3 
feet high: sheaths loose, shorter than the internodes: leaves flat, 2-4 inches 
long: panicle oblong, an inch long: outer glumes united at the base, about 
2 lines long, acute, pubescent with short hairs, the keel ciliate with long 
hairs: flowering glumea little shorter than the outer ones, glabrous except 
at the villous apex: awn inserted below the middle, straight, much exceed- 
ing the glume. Wet medows and banks of streams, in the high moun- 
tains, Idaho to Montana and Colorado. 
Tribe 5 Avenex. Spikelets two- to several-flowered. Outer 
empty glume usually longer than the first flowering one. One or 
more of the flowering glumes awned on the back, or from between the 
teeth of the bifid apex. Awn usually twisted or geniculate. Callus 
and usually the joints of the rachis hairy. 
26 DANTHONIA DC. Fl. Fr. iii, 32. . (1805.) 
Mostly perennial grasses with flat or convolute leaves and con- 
tracted or open panicles. Spikelets 3- to several-flowered, the flow- 
ers all perfect, or the upper staminate, pubescent, extended be- 
yond the flowers. Glumes 5 to several, the 2 lower empty, keeled, 
‘acute, subequal, persistent, generally exceeding the uppermost 
flowering one. Flowering glumes rounded on the back, 2 toothed,. 
deciduous, the awn arising from between the acute or awned teeth, 
flat and twisted at base, bent. Palet hyaline 2-keeled near the 
margins, obtuse or 2-toothed. Stamens,3. Styles distinct, with 
plumous stigmas. Grain free, enclosed in the glume. 
D. Californica Bolander Proc. Calif, Acad. ii, 182. Stems slender, 
1-4 feet high, erect, or geniculate at the lower nodes, smooth : leafy nearly 
so the top: sheaths rather loose, closed at the hairy throat, usually pubses- 
cent mostly shorter than the internodes: ligules nearly obsolete: leaveoa of 
the radical shoots numerous, with short sheaths and slender involute bredes 
4-8 inches long; of the stem with flat or loosely involute blades, scabn us, 
especially toward the inyolute point, often thinly pubescent, 2-5 ie Shes 
long: inflorescence a short simple panicle: spikelets cuneate, compry®sed, 
5-8-flowered: empty glumes lanceolate, with long carinate or in lute 
points,6-7 lines long: flowering glumes broadly lanceolate, acuminate with 
2 teeth 1 line long at the apex, smooth except a tuft of pilose hairs on each 
margin, or often slightly ciliate throughout: awn inserted at the base of 
the sinus, slightly hispid, often twisted and bent, 3-5 lines long: palet ob- 
_long, 3-toothed at the apex. In moist ground, Washington to California. 
D. intermedia Vasey Bull. Torr.. Bot Club x, 52. Densely tufted: 
