726 GRAMINEZ / AGROSTIS? 
lower exceeding the internodes: ligules almost. herbaceous, 3~4-lines long, ' 
obtuse: panicle rather dense, narrow, erect, 7-10:incheés long; its short’ 
branches erect: spikelets 1-144 lines long, narrowly lanceolate, turgid: | 
outer glumes unequal, hispidulous throughout and hispid on the keelw1+2!; 
lines long: flowering glume broadly oblong, minutely dentate at the trun: 
cate apex, thin-membranous, 5-nerved to-the apex, 24 linelong: palet mins’ 
ute or wanting. In moist places, Alaska to California. . | st ag 
“A. densiflora Vasey Cont. Nat: Herb. 3, 702: A tufted annual: stems 
erect or geniculate at the lower nodes smooth, 9-12 inches’ high: sheathgil 
rather loose, nearly smooth, crowded below, longer than:the internodes¢” 
ligules 2 lines long, obtuse: leaves flat or folded, :2+3 lines:wide, hispidulous'+ 
on both sides, rather thick and rigid; erect tapering to the apex: panicles 
dense, 2-3 inches long, its seabrous branches: glomerate: empty glumes.14go 
lines long, nearly equal, acuminate, carinate and hispidulousson the backee 
flowering glume oblong, truncate, smooth except a minute tuft of white 
hairs on the ventral side at base, 5-nerved, nearly 1 line long, with or 
without a slender awn a line or less long near the apex: palet. wanting. 
Washington to California. cut 
A. microphylla Steud. Syn. Pl. Gram. 164. Loosely tufted annual: » 
stems slender, erect, 6-15 inches high, often branched at the base: sheaths 
nearly smooth, closed, shorter than the internodes: ligules 1-2 lines long, ., 
usually lacerate: leaves erect, flat or loosely involute, 1-3 inches long + 
pear spike-like 1-3 inches long, light green or purplish, its branches 5-6 
ines long: empty glumes nearly equal, 144-2 lines long, subulate-pointedy - 
hispid on the keel, 1-nerved: flowering glume broadly oblong,4-toothed 
at the apex, thin, a line or less long, with a slender awn 2-3 lines.long on . 
its back above the middle: palet wanting. In the coast ranges, Oregon, . 
and California. Pas 
A. grandis Trin. Agrost. ii, 70. Stems erect, 1-2 feet high: sheaths” 
smooth, much shorter than the internodes: ligule about 2 lines long, acute: 
leaves 2-8 inches long, 1-3 lines wide: panicle usually ample, 4-8 inches): 
long, erect, dense, more or less interrupted below, its short. branches erec£<¢.. 
empty glumes ovate, acute or acuminate, 114 line long, the lower one scab-~ 
rous on the keel: flowering glume similar to the outer ones. In moisty 
meadows, California to Washington. __ . Ai 
A. verticillata Vill. Trin. Sp. Gram. i, t. 36. Stems 1-2 feet long;*! 
decumbent and taking root below, several of the'lower nodes geniculate: — 
sheaths loose, shorter than the internodes: ligules truncate, 1-2 lines long: 
leaves short, flat, 1-3 lines wide, roughish on the mbes surface and mar- 
gins: panicle 2-6 inches long, dense and spike-like, lobed and interrupted, 
its short branches crowded and spikelet-bearing from the base: emptyi 
glumes about equal, acute, roughened with minute pubescence: flows: 
ering glume about half as long as the outer ones, 5-nerved and minu 4 
5-toothed at the obtuse apex: palet nearly as long as theglume. ‘Ini! 
ditches and wet places, southern Oregon to California and Texas. «© © «i'w 
A. tenuiculmis Nash A. tenuis Vasey. Loosely tufted: perennial: © 
stems slender, 6-10 inches high, somewhat geniculate below: leaves 1-2 
inches long, narrow, about 2 on the stem: ligules short: panicle pyramidal; 
open, 2-3 inches long, its capillary branches in threes or fives below, the: 
longest an inch or more long, spreading or ascending: spikelets less than 
line long: empty glumes acute, purplish, the lower cne a little shorter and»! 
broader: flowering glume thin, obtusish, 3-nerved above, a little shorter’ 
than the outer ones, not awned: palet very minute or wanting. On dry® 
ridges, California to eastern Washington. i 
A. Pringlei Scribn. Am. Grasses i, 156. Stems erect or ascending, 
1-2 feet long. froma stoloniferous ‘perennial base: leaves flat, narrows!? 
rather-rigid: panicle narrow, loosely: flowered, 3-8 inches long: emptyd 
