HITCHCOCK AND CHASE — NORTH AMERICAN PANICUM. 309 



sterile lemma more or less pustulate-papillose between the nerves, the glume slightly 

 shorter than the usually involute-pointed sterile lemma; fruit 2.4 mm. long, 1.2 mm. 

 wide, elliptic, minutely umbonate. 



Autumnal form widely spreading, bearing more or less divaricate branches from 

 all the nodes, these primary branches longer than the internodes and branching from 

 all or from their upper nodes, the ultimate branchlets in short, dense fascicles, the 



reduced blades ascending, exceeding the numer- 

 ous, small, partly included panicles; winter rosette 

 a crown of a few short, leafy, basal shoots, with 

 evident internodes. 



The type of P. joorii is an exceptional speci- 

 men, having unusually large blades. The only 

 other collection seen which entirely matches the 

 type is Chase 4274 (Lake City, Florida), in which 

 the blades are even a little longer than in Joor's 

 no. 39. Harper's no. 1106 (Georgia) and Tracy 120 

 and 3318 (Mississippi) are much like the type. 

 The type of P. manatense represents the usual 

 form in its early autumnal state. As a whole this species has glabrous culms, sheaths, 

 and blades, but occasional specimens more or less puberulent are found, such as 

 Combs 860, Heller 4120, and Hitchcock Lee Co. PI. 477. 



Three specimens with spikelets only 2.2 to 2.5 mm. long, and with more or less 

 pubescence on culms and sheaths are doubtfully referred here: Florida: Orange Bend, 

 Chase 4094. Louisiana: Burnside, Combs 1427; Plaquemines Parish, Langlois 39. 



Fig. 348.— P. joorii. From type specimen. 



DISTRIBUTION. 



Low or swampy woods, southeastern Virginia to Florida, west to Texas and Arkansas; 

 also in Mexico. 



Virginia: Princess Anne County, Mackenzie 1794. 



South Carolina: Isle of Palms, Chase 4550. 



Georgia: Burke County, Harper 767; Leslie, Harper 1106; Albany, Tracy 3655; 



Thomson, Bartlett 1501. 

 Florida: Lake City, Chase 4274, Combs 144, Hitchcock 1011; Madison, Combs 



270; Chattahoochee, Curtiss 



in 1884; Quincy, Combs 412; 



Tallahassee, Combs 373; Old 



Town, Combs 860; Titusville, 



Chase 4019, Hitchcock 756, 760; 



Eustis, Nash 240 in part; 



Orange Bend, Chase 4099; El- 

 dorado, Chase 4126; Gainesville 



Chase 4219, 4256; Dunnellon, 



Combs 921; Mary Esther, 



Tracy 9142; Bartow, Combs 



1237; Tampa, Combs 1393, 



1400, Hitchcock 947; Manatee, 



Hitchcock 976, Rugel 351, 378; Myers, Chase 4181, Hitchcock 909, Lee Co. PI. 



471; Alva, Hitchcock Lee Co. PL 477; Miami, Chase 3907, 3948, Eaton 169, 



Hitchcock 576, 636, 652, 660, 674. 

 . Alabama: Chehaw, Hitchcock 577. 



Mississippi: Starkville, Chase 4468; Tracy 29 in 1889; Morrisville, Tracy 3387; 



Bludlebury, Tracy 3318; Lake, Tracy 120 in 1888; Meridian, Tracy 3266. 

 Arkansas: Lafayette County, Heller 4120. 



Fig. 349.— Distribution of P. joorii. 



