HITCHCOCK AND CHASE ISTOETH AMEKICAN PANICUM. 



119 



to 5 mm. wide, usually scarcely wider than the sheaths, erect, flat or folded, pilose on 

 the upper surface near the base, otherwise glabrous; panicles 5 to 20 cm. long, usually 

 loose and open, the primary branches few, slender, distant, spreading or drooping, 

 sometimes rather narrow and compact, with ascending branches, the branchlets borne 

 along the upper half or toward the ends only, the short-pediceled spikelets in more or 

 less secund clusters; spikelets 2.2 to 2.4 mm. long, about 0.8 mm. wide and twice as 

 thick at maturity, rather strongly nerved; first glume about half the length of the 

 spikelet, acute; second glume and sterile lemma subequal, slightly exceeded by the 

 enlarged, indurated sterile palea; fruit 1.8 to 1.9 mm. long, 0.7 mm. Made, the margins 

 of the lemma scarcely inrolled. 



The immature spikelets are dorsally compressed; it is only as they mature that the 

 characteristic induration of the sterile palea takes place. 



DISTRIBUTION. 



Damp soil along ponds and streams. North Carolina to Florida, west to New Mexico 

 and north through Arkansas to southern Missouri and Oklahoma. 



Missouri: Campbell, Bush 120. 



North Carolina: Rowan County, Small & Heller 205; Wilsons Mills, Chase 

 3098. 



South Carolina: Columbia, Cur tiss 3594; Orangeburg, Hitchcock 451. 



Georgia: Savannah, Kearney 187; Bulloch County, Harper 838; Oliver, Curtiss 

 6836. 



Florida: Jacksonville, Combs 26, Kearney 173; Lake City, Combs 117, 125, 172, 

 187; Madison, Combs 262; River Junction, Combs 434; Pensacola, Combs 

 526; Quincy, Combs 427; Chipley, Combs 587; Waldo, Combs 712; Ellzey, 

 Combs 831; Arcadia, Combs 1246; Eustis, Nash 213; Jupiter, Curtiss 5534; 

 Manatee, Rugel 231; Braidentown, Combs 1261, 1325, Tracy 7038; Pease 

 Creek, Curtiss 3594; Myers, Hitchcock 872, Lee Co. PI. 488, 489; Miami, 

 Chase 3889. 



Alabama: Tuskegee, Carver 47; 

 Mobile, Kearney 30, Mohr in 

 1883. 



Mississippi: Nicholson, Kearney 

 363; Starkville, Tracy in Pol- 

 lard Distr. 1418; Waynesboro, 

 Kearney 121; Ocean Springs, 

 Seymour 25. 



Arkansas: Central Arkansas, Har- 

 vey; Malvern, Eggert 117. 



Louisiana: Rayville, £aZZ26; Cal- 

 houn, Ball 60, Hitchcock 1282; 



Alexandria, Ball 535; Oberlin, Ball 190; Red River Parish, Ball 123; Abbe- 

 ville, Langlois in 1884; Lake Charles, Hitchcock 1133, Tracy in 1897. 



Texas: Jacksonville, Plank 63; Luling, Plank 18; Texarkana, Heller & Heller 

 4103, 4145; Huntsville, Plank 65; Orange, Plank 46; Pierce, Tracy 7745; 

 Terrell, Warburton in 1904; Hempstead, Hall 815; Indianola, Ravenel in 

 1869; Ennis, Sm,ith in 1898; Harvester, Hitchcock 1184, Thurow in 1898; 

 Galveston, Phmk 35, 83; Kingsville, Piper in 1906; Cold Creek, Bigelow. in 

 1853; without locality, Reverchon 99 in 1879. 



Oklahoma: Sapulpa, Bush 707, 708, 709; on the Washita, Palmer 381 in 1868. 



New Mexico: Las Cruces, PZani 6. 



Fig. 112. — Distribution of P. Mans. 



