736 | GRAMINEAE ELEUSINE 
STIPA 
prairies, Washington to California and Wisconsin. 
20 ELEUSINE Geertn. Fruct. et Sem. i, 7. 
Tufted annual or perennial grasses with flat leaves and spicate 
inflorescence, the spikes digitate or close together at the summit 
of the stem. Spikelets several-flowered, sessile, closely imbricat- 
ed in two rows on one side of the rachis, which is not extended 
beyond them. Flowers all perfect, or the upper staminate. 
Glumes compressed, keeled, the twe lower empty, the others sub- 
tending flowers or the upperempty. Stamens3. Styles distinct, 
with plumose stigmas. Grain loosely enclosed in the glume. | 
E. Inpica Geertn. |..c. Stems 6-12 inches long, tufted, erect or decum- 
bent, glabrous: sheaths loose, longer than the internodes, often crowded at 
the base of the stem, glabrous sometimes sparingly villous: ligules very. 
short : leaves 3-12 inches long, 1-3 lines wide, smooth or scabrous: spikes 2- 
10, 1-3 inches !ong, whorled or approximate at the summit of the stems orone 
or two sometimes distant: spikelets 3-6-flowered, 144-2 lines long: glumes 
acute minutely scabrous on the keel, the first l-nerved, the second 3-7- 
nerved, the others 3-5-nerved. In fields and waste places, naturalized 
from Europe. 
Tribe 3 Stipacee. Spikelets strictly 1-flowered. Flowers with a 
sharp pointed callus, deciduous. Flowering glume enfolding the palet 
and grain, coriaceous and indurated in fruit, and terminated by a 
simple or triple awn. ithe 
21 STIPA L. Sp. 78. 
Mostly tall grasses with usually convolute leaves and paniculate 
inflorescence. Panicle open, with a few spreading branches, or 
sometimes crowded and narrower spikelets 1-flowered, the cylin- 
dri¢al flower with an obconic bearded and often elongated sharp- 
pointed base. Glumes subequal, membranous, often terminated 
by a long subulate point. Flowering glume coriaceous, cylindri- 
cal-involute, enclosing the mostly shorter palet, entire at the apex 
or terminating in 2 minute sometimes hyaline teeth, nake d or with 
a crown of short hairs, conspicuously awned. Awn articulated 
with the glume, often caducous, geniculate below, glabrous or pu- 
bescent, or plumose with spreading hairs. Stamens usually 3. 
Styles short, distinct: stigmas plumose with simple hairs. Grain 
cylindrical, smooth, free, enclosed in the glume. 
S. occidentalis Thurber Bot. Wilkes 483. Stems slender 1-2 feet high, 
somewhat scabrous, pubescent at the nodes: sheaths close, hispid. shorter 
than the internodes: ligules 2-244 lines long, lacerate at the apex: leaves 
filiform, convolute, sharp pointed, hispid, 2-12 inches long: panicle slen- 
der, 3-4 inches long, often included at the base, its branches mostly in 
twos, erect, 1-2 inches long: spikelets lanceolate, turgid, 4-6,lines long: 
empty glumes appressed, lanceolate, acute, thin, purplish below, smooth, 
the first one obscurely 5-7-nerved at base, 5-6 lines long, the second about 
1 line shorter, 3-nerved: stipe obconical, acute, pubescent, 4% line long: 
flowering glumes thin-chartaceous, pubescent, plainly 5-nerved : awn artic- 
ulated, persistent, flattened, twisted, 1144-2 inches long, bent near the mid- 
dle, the lower half plumose: palet oblong, 2-214 lines long, pubescent on 
the back and obtuse apex. Common in the mountains, central California 
