56 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
as much as 30 cm. long, 2 to 6 mm. wide, rarely narrower; panicles rather few-flowered, 
oblong, narrow, 10 to 20 cm., rarely 30 cm. long, about 
one-third as wide, the branches at first narrowly ascend- 
ing, somewhat spreading at maturity, the peduncle of 
the panicle not brittle and readily breaking as in P. 
capillare; spikelets long-pediceled, 3.1 to 3.5 mm. long, 
0.9 to 1 mm. wide, lanceolate, acuminate; first glume 
about one-third the length of the spikelet; second glume 
slightly longer than the sterile lemma, both 7 to 9-nerved, 
much exceeding the fruit, the palea of the sterile floret 
WH wanting; fruit 2 mm. long, 0.9 mm. wide, elliptic. 
i This species is distinguished from P. capillare by the 
Fic. 36.—P. flerile, From type ™ore slender culms, less dense pubescence, narrower 
specimen. blades, the narrow, less diffuse panicles and the longer, 
acuminate spikelets; and from P. philadelphicum by 
the narrow panicle and larger, acuminate spikelets. 
DISTRIBUTION. 
Sandy, mostly damp soil, meadows and open woods, Ontario to South Dakota, south 
to Florida and Texas. 
’ Ontario: Sarnia, Dodge 128, 130, Macoun 26332; St. Clair River, Dodge 124; 
Birch Island, Macoun 26331; Point Edward, Macoun 26330. 
PENNSYLVANIA: Lancaster County, Heller 701, 4777, 4786, Porter in 1862, Small 
~ in 1890 and 1892. 
Onto: Erie County, Moseley in 1895; Columbus, Werner 6777. \ ,/ 
Inprana: Clarke, Umbach in 1898. 
Iuurnors: Chicago, Bebb 2928, Chase { 
1474, 1479, 1729, 2006, Hill in 
1901; Ingraham in 1893; Beach, 
Umbach 2543; St. Clair County, 
Eggert 241. 
Micuiaan: Port Huron, Dodge in 
1909; Orion, Farwell 893; Jack- 
son County, Wheeler in 1892. 
Soutn Daxora: Stearns, Wallace | 
AG. 
Iowa: Cedar Rapids, Pammel in Fig. 37.—Distribution of P. flexile. 
1889 (Mo. Bot. Gard. Herb.). 
Missourt: Glenwood, Bush 3295; St. Louis, Eggert in 1875; Dodson, Bush 848; 
Eagle Rock, Bush 384; Noel, Bush 5259. 
Baltimore DISTRICT oF CotumsBiA: Steele in 1896 and 1898. 
Hitt im Virernta: Four-Mile Run, Chase 5444. 
S: West Vrirernia: Peters Mountain, Steele 281. 
Frioripa: Without locality, Curtiss in 1886. 
Kentucky: Bell County, Kearney 312. 
TENNESSEE: Knoxville, Kearney in 1893, Ruth 66; Johnson City, Canby 221; 
Cocke County, Kearney 960; Nashville, Gattinger in Curtiss N. Amer. PI. 
3581 J, 3582a, and J. 
AutaBaAMA: Monte Sano, Baker in 1897; Jackson County, Chase 4492. 
Mississippi: Starkville, Chase 4453, Kearney 72, 88 in part. 
ARKANSAS: Benton County, Plank 12, 107; Fulton, Bush 906. 
Texas: Clarksville, Plank 6, 10 in part. 
\ 
