HITCHCOCK AND CHASE—-NORTH AMERICAN PANICUM. a 
type of P. chloroticum, while Morong 1002 and Riedel 959 have spikelets 3 mm. long, 
as in the type of P. chloroticum P sylvestre. 
These different variations in pubescence, size of spikelet, and habit can not be in 
any way correlated and each is connected by intergrading specimens with the typical 
form. Nor has any variation a separate geographical range, though specimens with 
pilose blades are commoner in the West Indies than elsewhere. 
The specimens cited below from Brazil have larger spikelets. They belong to the 
form mentioned above under P. chloroticum as variety sylvestre. 
DISTRIBUTION. 
Moist ground, along streams, and a weed in waste places and cultivated soil, Maine 
to Nebraska, south to Florida and Texas; also in California, Mexico, the West In- 
dies, and South America to Uruguay. 
Maine: North Berwick, Parlin in 1891 (Gray Herb.). 
MAssAcHUSETTS: Cambridge, Morong i in 1876; Newburyport, Leavitt & Eaton in 
1902; Plymouth, Oakes. 7). 
becidcneur: Stamford, Driggs 8; South Ghacubury. Wilson 1248; Bridgeport, 
Eames.in 1895. 
New York: Northville, Young in 1872 (Hitchcock Herb.). 
New Jersey: Olifton, Nash in 1891; Weehauken, Van Sickle in 1895; Freehold, 
Pearce in 1884. 
PENNSYLVANIA: Easton, Porter in 1895; Chambersburg, Porter in 1898; West- 
moreland County, Pierron in 1877; Lancaster County, Heller in 1900. 
Outo: Niles, Ingraham in 1891; Sheffield, Ricksecker in 1894. 
InprAnA: Wells County, Deam in 1903; Lafayette, Dorner 23, 86. 
Inuinors: Chicago, Moffatt 374, Umbach in 1896; Pine Rock, Waite in 1885; 
Peoria, Brendel, McDonald 71; St. Clair County, Eggert 110. 
Towa: Mount Pleasant, Mills in 1894; Jefferson, Wilcox 27; Manchester, Ball 39; 
Murray, Morris A 287; Fayette County, Fink 409. 
Nesraska: Talmage, Elmore 71; without locality, Holmes in 1889. 
Missouri: Courtney, Bush 10 in 1892. 
Kansas: Topeka, Smyth 331; Riley County, Hitchcock 3838, Norton 567, Carleton 
in 1892. 
DELAWARE: Wilmington, Commons 
229, 230, Canby in 1896. 
Marytanp: Garrett County, Smith 
in 1879. 
District or CoLtumBiIA: Chase in 
Kneucker Gram. Exs. 546, 
McCarthy in 1886, Pollard 682, 
Steele in 1896, Vasey in 1887, 
Ward in 1876, Williams in 1896. 
Virernis: Virginia Beach, Hitch- 
cock 217; Gravelly Run, Ward Fig. 32.—Distribution of P. dichotomiflorum. 
in 1886. 
West Virarnia: Aurora, Steele in 1898; Tygarts Valley, Smith in 1879. 
Nortn Carona: Chapel Hill, Ashe; West Raleigh, Stanton 1280; Biltmore, 
Biltmore Herb. 702a; Magnetic City, Wetherby 19. 
SoutH Carona: Lexington, Corley in 1879; St. Helena Island, Cuthbert in 1904. . 
Georeata: Dalton, Harper 382; Augusta, Kearney 208. 
Fiorria: Duval County, Fredholm 395; Lake City, Chase 4234, Combs 94; Eustis, 
Nash 372, 567, 874; Crystal, Combs 990; Manatee, Grapicn, Combs 1251. 
Kentucky: Bell County, Kearney 374. 
TENNESSEE: Knoxville, Ruth 71; Cocke County, Kearney 966; Nashville, Gat- 
tinger in 1879. 
