HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 



51 



type of P. chloroticum, while Morong 1002 and Riedel 959 have spikelets 3 mm. long, 

 as in the type of P. chloroticum /? 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 in 1876; Newburyport, Leavitt & Eaton in 



1902; Plymouth, Oakes. 

 Connecticut: Stamford, Driggs 8; South Glastonbury, Wilson 1248; Bridgeport, 



Eames in 1895. 

 New York: North ville, Young in 1872 (Hitchcock Herb.). 

 New Jersey: Clifton, 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. 

 Ohio: Niles, Ingraham in 1891; Sheffield, Ricksecker in 1894. 

 Indiana: Wells County, Beam in 1903; Lafayette, Dorner 23, 86. 

 Illinois: Chicago, Moffatt 374, Umbach in 1896; Pine Rock, White in 1885; 



Peoria, Brendel, McDonald 71; St. Clair County, Eggert 110. 

 Iowa: Mount Pleasant, Mills in 1894; Jefferson, Wilcox 27; Manchester, Ball 39; 



Murray, Morris A 287; Fayette County, Fink 409. 

 Nebraska: 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. 

 Maryland: Garrett County, Smith 



in 1879. 

 District of Columbia: Chase in 



Kneucker Gram. Exs. 546, 



McCarthy in 1886, Pollard 682, 



Steele in 1896, Vasey in 1887, 



Ward in 1876, Williams in 1896. 

 Virginia: Virginia Beach, Hitch- 

 cock 217; Gravelly Run. Ward 



in 1886. 

 West Virginia: Aurora, Steele in 1898; Tygarts Valley, Smith in 1879. 

 North Carolina: Chapel Hill, Ashe; West Raleigh, Stanton 1280; Biltmore, 



Biltmore Herb. 702a: Magnetic City, Wetherby 19. 

 South Carolina: Lexington, Corley in 1879; St. Helena Island, Cuthbert in 1904. 

 Georgia: Dalton, Harper 382; Augusta, Kearney 208. 

 • Florida: Duval County, Fredholm39b; Lake City, Chase 4234, Combs 94; Eustis, 



Nash 372, 567, 874; Crystal, Combs 990; Manatee, Chapman, Combs 1251. 

 Kentucky: Bell County, Kearney 374. 

 Tennessee: Knoxville, Ruth 71; Cocke County, Kearney 966; Nashville, Gat- 



tinger in 1879. 



Fig. 32. — Distribution of P. dichotomiflorum. 



