206 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Fig. 210.— Distribution of P. leucothrix. 



ones like those in the type of P. leucothrix. The New Jersey specimens, Chase 3536, 

 3556, and 3578, as also Hitchcock 1163 and 1398, though small plants with small 

 panicles, are as little pubescent as is the type of P. parvispiculum or even less so. 



DISTRIBUTION. 



Low pine lands, New Jersey to Florida and Mississippi; also in Cuba. 

 New Jersey: Atsion, Chase 3536, 3556; Forked River, Chase 3578. 

 North Carolina: Wilmington, 



Hitchcock 377. 

 South Carolina: Orangeburg, 



Hitchcock 14, 376, 1372, 1398. 

 Georgia: Darien Junction, Small 



in 1895; Alapaha, Curtiss 6817 



in part. 

 Florida: Jacksonville, Combs 6, 



Kearney 146; Washington 



County, Combs 672, 673; Chip- 

 ley, Combs 551, 572, 617; Eus- 



tis, Hitchcock 800, 805, Nash 



334, 467, 1338, 2075; Seminole, 



Tracy 7193 in part;« Warrenton, Tracy 8410. 

 Mississippi: Ocean Springs, Tracy 43. 



Louisiana: St. Tammany Parish, Cocks 286; Lake Charles, Hitchcock 1163. 

 Cuba: Herradura, Hitchcock 554; without locality, Wright 3460 in part. 



119. Panicum longiligulatum Nash. 



Panicum longiligulatum Nash, Bull. Torrey Club 26: 574. 1899. "Collected by 

 Dr. Geo. Vasey, at Apalachicola, Florida, in 1892." The type, in Nash's herbarium, 

 consists of two vernal culms with three autumnal culms of the preceding year attached. 



Elliott & described this species under P. "nitidum? La Marck" as shown by the 

 specimen so labeled in the Elliott Herbarium. 



DESCRIPTION. 



Vernal culms usually stout, 30 to 70 cm. high, erect, or ascending at base, glabrous; 

 sheaths glabrous, usually much shorter than the internodes; ligules 2 to 3 mm. long; 

 blades rather thick and firm, 4 to 8 cm. long, 4 to 8 mm. wide, glabrous on the upper 

 surface, puberulent beneath, gradually narrowed to the sharp point, the lower ascend- 

 ing, the upper spreading or often reflexed; panicles ovoid, 3 to 8 cm. long, two-thirds 

 to three-fourths as wide, rather densely flowered, the slender 

 branches usually stiffly ascending, short spikelet-b earing 

 branchlets in the axils; spikelets 1.1 to 1.2 mm. long, 0.7 mm. 

 wide, elliptic, pubescent; first glume one-fourth as long as the 

 spikelet; second glume slightly shorter than the fruit and 

 sterile lemma; fruit 1 mm. long, 0.7 mm. wide, elliptic. 



Autumnal culms more or less reclining, the branches 



spreading, usually somewhat recurved, with crowded 



branchlets and spreading, subinvolute, reduced blades about 



equaling the reduced panicles of few long-pediceled spikelets; winter rosette 



prominent, blades glabrous. 



Smaller, more slender specimens of this species resemble less pubescent specimens 

 of P. leucothrix; these may be distinguished from that species by the glabrous culms 

 and sheaths and slightly smaller spikelets with fruit exposed at the summit. 



a Panicum longiligulatum and P. lindheimeriweve also distributed under this number. 

 &Bot. S. C. & Ga. 1: 128. 1816. 



Fig. 211.— P. longiligulat- 

 um. From type speci- 



