288 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



at the base, glabrous on the upper surface, densely velvety-hirsute beneath, usually 

 short-ciliate nearly to the apex; panicles short-exserted or included at the base, 7 to 



12 cm. long, as wide or wider, 

 loosely flowered, the branches 

 finally spreading; spikelets 4 to 

 4.3 mm. long, 2 to 2.2mm. wide, 

 obovate, turgid and blunt, 

 sparsely papillose-pubescent; 

 first glume one-third to two- 

 fifths the length of the spikelet, 

 acute; second glume and sterile 

 lemma subequal, scarcely equal- 

 ing the fruit at maturity, 

 strongly nerved; fruit 3.2 mm. 

 long, 2 mm. wide, elliptic, mi- 

 nutely apiculate. 



Autumnal form more or less 



spreading, branching from the 



middle and upper nodes, the 



late in the season, the reduced blades 



Fig. 323.— P. ravenelii. From type specimen. 



short branchlets crowded at the summit 

 ascending, overtopping the small panicles. 



DISTRIBUTION. 



Sandy or gravelly woods or open ground, Maryland to Missouri, Florida, and Texas. 

 Missouri: Swan, Bush in 1899. 



Delaware: New Castle County, Canby (Field Mus. Herb.). 

 Maryland: Great Falls, Chase 3780; Riverdale, Chase 3796. 

 District of Columbia: Steele in 1898 and 1900; Ward in 1881. 

 Virginia: Danville, Small & Heller in 1891 (Biltmore Herb.). 

 North Carolina: Wilmington, Hitchcock 420, 1463, 1489; Raleigh, Chase 3088; 



Chapel Hill, Ashe. 

 South Carolina: Aiken, Ravenel; 



Orangeburg, Hitchcock 1390; 



Keowee, House 2200. 

 Georgia: Cobb County, Wilson 



31, 47; Thomson, Bartlett 1502. 

 Florida: Apalachicola, Biltmore 



Herb. 2994a; Mc iticello, Combs 



305; Chipley, Combs 602 in 



part; Lake City, Chase 4279, 



Hitchcock 1010. 

 Tennessee: Henderson, Bain in 



1893 (Univ. Tenn. Herb.). 

 Alabama: Mobile County, Mohr 153; Flomaton, Hitchcock 1047; Auburn, Hitch- 

 cock 1334; Tuskegee, Carver 13. 

 Mississippi: Starkville, Tracy in 1888; Jackson, Hitchcock 1294; Mississippi City, 



Hitchcock 1107. 

 Arkansas: Little Rock, Coville in 1887; Fulton, Bush 2526; Benton County, 



Plank 56, 143; northwestern Arkansas, Harvey 31. 

 Louisiana: Calhoun, Hitchcock 1288; Shreveport, Hitchcock 1245. 

 Texas: Big Sandy, Reverchon 2390; Harvester, Thuroiv in 1898; Waller, Hitch- 

 cock 1187; without locality, Nealley in 1885, Wright 280 (Gray Herb.). 



Fig. 324.— Distribution of P. ravenelii. 



