170 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



wrinkling conspicuous in the lower blades; panicles 4 to 8 cm. long, one-half to two- 

 thirds as wide, the lower branches usually narrowly ascending; spikelets 2.6 to 2.8 

 mm. long, 1.6 to 1.8 mm. wide, obovate, blunt, turgid; first glume one-third the 

 length of the spikelet or less; second glume and sterile lemma equal, scarcely cov- 

 ering the fruit at maturity, densely papillose-villous, the bullate papillae prominent; 

 fruit 2 mm. long, 1.5 to 1.7 mm. wide, minutely puberulent at the apex. 



Autumnal form spreading or decumbent, the numerous branches somewhat flabel- 

 lately fascicled, the blades mostly 3 to 4 cm. long, 2 to 3 mm. wide, flat, thin, and 

 papery. 



The vernal form of this species may be distinguished from P. angustifolium by the 

 greater amount of pubescence, the bearded nodes, and the ascending panicle-branches, 

 and the autumnal form by the widely spreading habit and shorter blades. 



DISTRIBUTION. 



Sandy pine woods of the Coastal Plain from North Carolina to northern Florida and 

 west to eastern Texas. 



Virginia: Virginia Beach, Hitchcock in 1905. 



North Carolina: Wilmington, Hitchcock 1449, 1471; Wards Mill, Onslow 



County, Chase 3174; Wilsons Mills, Chase 3095; Roanoke Island, Chase 3230. 

 South Carolina: Orangeburg, 



Hitchcock 1373, 1382. 

 Georgia: Macon, Small in 1895; 



Darien Junction, Small in 



1895. 

 Florida: Baldwin, Hitchcock 986, 



999 ; Washington County, 



Combs 570, 651; Marianna, 



Traq/3633; Milton, Chase 4299; 



without locality, 'Rugel 142. 

 Alabama: Gateswood, Tracy 8427. 

 Mississippi: Vicinity of Biloxi, 



Chase 4351, Hitchcock 1069, 



1070, 1083, Kearney 218 in part, 284 in part, Tracy 1884, 2873, 3661, 4614. 

 Arkansas: Texarkana, Heller 4238. 



Louisiana: Lake Charles, Hitchcock 1139, 1155, Langlois in 1884. 

 Texas: Beaumont, Reverchon 4156 ; Waller County, Thurow 23 in 1906. 



Fig. 161.— Distribution of P. consanguineum. 



94. Panicum angustifolium Ell. 



fPanicum ramulosum Michx. Fl. Bor. Amer. 1 : 50. 1803. "Hab. in sylvis Caro- 

 linae." The type specimen, in the Michaux Herbarium, labeled "in pratis caespi- 

 tosis Carolinae," belongs to a species of the Angustifolia, apparently P. angustifolium, 

 but on account of the fragmentary condition of the type, which is devoid of spikelets, 

 and the insufficiency of Michaux's description the identity of this specimen can not 

 be determined with certainty. 



Panicum angustifolium Ell. Bot. S. C. & Ga. 1 : 129. 1816. No locality is cited. 

 The type, in the Elliott Herbarium, consists of a single culm, lacking the base, bearing 

 three leaves and a scarcely exserted, immature panicle; the culm is glabrous, the 

 sheaths are sparingly pilose, densely ciliate on the margin toward the summit; blades 

 18 cm. long, involute toward the apex, long ciliate on the margin for half to two- 

 thirds their length, otherwise glabrous. The accompanying label reads: "Panicum 

 angustifolium. Hab: in aridis. Flor. Ma.?" 



