764 GRAMINE Zi POA 
ERAGROSTIS 
bearing a single spikelet: spikelets 2-3-flowered, 3-4 lines long, rather 
broadly ovate: empty glumes somewhat unequal, the first broadly lanceol- 
ate, l-nerved, subacute, the second much broader than the first, 3-nerved, 
from subacute to broadly truncate at the erose-dentate apex: flowering 
glumes glabrous, 2-3 lines long, distinctly 5-nerved, obtuse and erose- 
dentate at the scarious apex: palets a little shorter than the glumes. On 
the summits of high ridges. Malheur county Oregon. 
P. Buckleyana Nash Bull. Torr. Bot. Club. P. tenuifolia Buckley. 
A slender tufted perennial: stems erect, 12-20 inches high, usually bist 
rous and tinged with brown or pink: sheaths smooth, the lower !onger 
than the internodes: ligules 1-2 lines long, acute or acaminate, radical 
leaves numerous, flat or conduplicate, 2-6 inches long, less than 1 line wide, 
often abruptly acute at the apex, those of the stem 2, 1-2 inches long: 
panicle erect, narrow, 1-3 inches long, its filiform branches in twos or threes, 
3-12 lines long, erect or somewhat spreading: spikelets rather firm 3-5 lines 
long, mostly 3-flowered, pubescent, elliptical-lanceolate: empty glumes 
obtusely keeled, 3-nerved near the base, the first linear-lanceolate, about 
114g lines long, second elliptical-lanceolate, about 2 lines long: flowering 
glumes 2-244 lines long, elliptical or linear-oblong, acute to obtuse entire or 
erose, pubescent on the lower third, puberulent above: palets linear, 2-tooth- 
ed, 2 lines long. Common on dry plains, eastern Oregon to Brit. Columbia. 
Var. stenophylla Vasey, Beal grasses N, Am. ii, 580, under Atropis. 
Stems stouter : panicle open in flower: spikelets 4-6-flowered: glumes slight- 
ly larger. Ondry hillsides near Roseburg Oregon. 
P. Canbyi Glyceria Canbyi Scribn. An erect smooth stout perennial: 
stems simple 319-4 feet high : sheaths shorter than the internodes: ligules 
broad, obtuse, 3-4 lines long: leaves of the stem: 3-4, flat below, conduplicate 
above, 7 inches long, 3-5 lines wide: panicle linear or lanceolate, usually 
interrupted below, about 7 inches long, its branches in half-whorls, erect 
or ascending, densely flowéred, the longer 2-4 inches long: spikelets 3-5- 
_ flowered: empty glumes oval, acute or obtuse, almost keeled, 3-nerved, the 
first 114-2 lines long, second 2-3 lines long: Howar ag glumes oval, scabrous 
2-216 lines long, 5-nerved, often irregulary toothed at the acute apex: 
palets 2 lines long, narrow, 2-toothed at the apex. Inthe Cascade Moun- 
tains of Washington, 
46 ERAGROSTIS Beauv. Agrost. 70, t. 14, fig. 11. (1812) 
Annual or perennial grasses with flat leaves and contracted 
panicles. Spikelets two- to several-flowered, more or less flat- 
tened. Two lower glumes empty, unequal, shorter than the flow- 
ering ones, keeled, one-nerved, or the second one three-nerved: 
Flowering glumes membranous, keeled, three-nerved. Palets 
shorter than the glumes prominently two-nerved or two-keeled, 
usually persistent on the rachella. Stamens 2 or 3. Styles dis- 
tinct, short, with plumose stigmas. Grain free, loosely enclosed 
in the glume and palet. 
E. reptans Nees Agrost. Bras. 514. A glabrous annual: stems 1-18 
inches long, creeping, often forming mats 2-20 inches in diameter and 1-6 
inches high, branching, the branches erect or ascending: sheaths shorter 
than or equalling the internodes, villous at the summit: ligules a ring of 
short hairs: leaves 1-2 inches long, 14-1 line wide, flat, smooth beneath, 
rough above: spikelets dicecious, 10-35-flowered, 2-8 lines long: empty 
glumes unequal, the first 14-24 as long asthe second: flowering glumes about 
144 lines long, broadly ovate, acute: palets shorter than the glumes, ciliate 
on the keels. In wet places Oregon to the Eastern States. 
