q@ 3. P. nervosa (Hook.) Vasey. —»Culms srect or decumbent at the base, with 
creeping rhizomes, 30-60 om. tall; sheaths smooth or scaberulous; blades 
scaberulous or pubescent above, smooth ,beneath, flat or folded, 5-6 cm. long, 
innovations, 1-2 mn. wide; ligules truncate, 1-2 mm. long; 
panicles 5-10 om., usually 10 cm. long, the branches slender, flexuous, naked 
below; glumes glabrous or scabrous on the keels, the first lanceolate, 2-2.5 
the second lanceolate or ovate-lanceolate, 3 mm. long; lemmas 3.5 mm. 
mme long, she 
long, more or less pubescent on the nerves below; cobweb wanting. 
longer on the 
Woods, moist shady banks, and ravines, Shedroof lit,, 5000 ft.; Weissners 
Peak, 3400 fte 
4, P. pratensis L. Kentucky Bluegrass. —-»Culms erect, 20-80 cm. tall, 
with slender creeping rhizanes; sheaths usually smooth; ligules truncate, 1-2 
mme long; blades rather firm, flat or folded, scabrous above, smooth beneath, 
3-10 cme long, 1-3 mn. wide; panicles pyramidal, 4-12 cm. long, the branches in 
distant fascicles, 5-5 in a fascicle, naked below, ascending or spreading; 
spikelets crowded toward the ends of the branches, about 5 mm. long; first 
glume acuminate, the second widest at the middle, usually abruptly narrowed 
to an acute or acuminate apex; lemmas 5-4 mm. long, villous on the keel and 
marginal nerves, the cobweb dense. 
@ Woods, meadows, and waste places. 
2. 
Fowl iicadowgrass. —>Culms erect from a loose decumbent base, 
heaths smooth or scaberulous, the lower ones keeled and tinged § 
ri 
5. P. palustri 
40-120 cme tall; s 
with red or purple; ligules prominent, tmincate, 2-3 mme long, seldom longer; : 
blades flat or loosely folded, erect or ascending, sometines lax, 5-20 cm. long, } 
2-5 mae wide; panicles pyranidal, 10-40 cme long, the branches in rather distant 
fascicles, spreading, flexuous, naked below, as much as 10 cme long; spikelets 
pale or tinged with bronze and purple, 2-5 flowered; glumes lanceolate-acuminate, 
nearly equal, 2-5-5 mme long; lemmas lanceolate, blunt, obscurely nerved, 2.5=-3 
and marginal nerves, the cobweb sometimes scant. : 
a 
s Le 
ki 
woe 
wp 2 a os - j- _e 
mme long, villous on the keel 
TTT =~ de P aan 
Jet meadows, comnon. 
