HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 105 



District of Columbia: Greene in 1908, Steele, Vasey. 



Virginia: Four-Mile Run, Chase 2679; Goshen, Steele in 1904. 



West Virginia* Grafton, Guttenberg in 1879, Smith in 1879. 



North Carolina: Newbern, Kearney 2249; eastern North Carolina, McCarthy in 



1885; Henderson County, Smith in 1881. 

 South Carolina: Aiken, Ravenel in 1869; Isle of Palms, Hitchcock 225. 

 Kentucky: Bell County, Kearney 380; a Harlan County, Kearney 380.° 

 Tennessee: Hollow Rock, Biltmore Herb. 808a, Eggert in 1897; Cocke County, 



Kearney 969; Madison County, Bain in 1892. 

 Alabama: Scottsboro, Chase 4497. 

 Louisiana: Calhoun, Ba 11 70; Calcasieu, Cocks 3008. 

 Texas: Texarkana, Plank 77. 



53. Panicum longifolium Torr. 



Panicum longifolium Torr. Fl. North. & Mid. U. S. 149. 1824. "In the pine 

 barrens of New Jersey. * * * For specimens * * * I am indebted to Mr. 

 James Goldy. " The type, in the Columbia University Herba- 

 rium, is a small specimen 35 cm. high, with an open, few- 

 flowered panicle. 



Panicum anceps pubescens Vasey, U. S. Dept. Agr. Div. Bot. 

 Bull. 8 :37. 1889. "Mobile, Ala. (Dr. Mohr)." There is no 

 specimen in the National Herbarium marked with this name in 

 Vasey's writing, but there are two duplicate specimens of P. 

 longifolium with pubescent sheaths and blades, collected by 

 Dr. Charles Mohr, Mobile, Alabama, both labeled Panicum 



anceps and bearing an unpublished varietal name in Vasey's 

 Fig. 98.— P. longifolium. ... m , ..S T7 , , - £ -, . '. , 



From type specimen. writing. These agree with Vasey's brief description and are 



doubtless the basis of this name. Vasey applied this unpub- 

 lished varietal name also to specimens of P. anceps and to one of P. rhizomatum, but 

 Dr. Mohr's, being the only specimen cited, is taken as the type. 



Panicum pseudanceps Nash, Bull. Torrey Club 25: 85. 1898. "Collected by Mr. 

 J. H. Simpson in Florida in 1889." The type, in Nash's herbarium, consists of two 

 plants 58 and 60 cm. high, the panicles less open than those of the Goldy specimen 

 mentioned above. 



description. 



Plants in dense tufts, 35 to 80 cm. high, usually surrounded by basal leaves nearly 

 half as long as the culm; culms rather slender, much compressed, stiff, glabrous; 

 sheaths mostly shorter than the internodes except at the base, keeled, usually hairy 

 on the sides at the juncture with the blade, otherwise glabrous or villous toward the 

 summit, sometimes densely so; ligules fimbriate-ciliate, 2 to 3 mm. long, the cilise 

 usually at the sides only, not meeting at the back; blades erect or sometimes recurved 

 or tortuous, conduplicate at base, flat above or somewhat involute, 8 to 40 cm. long, 2 

 to 5 mm. wide, pilose on the upper surface toward the base, sometimes also on the 

 lower surface; lateral panicles few or none; terminal panicles finally long-exserted, 

 much exceeding the leaves, 10 to 25 cm. long, usually half to two-thirds as wide, but 

 sometimes rather contracted, the distant, slender branches solitary or fascicled, 

 ascending, usually nak-d at base, bearing short, appressed, rather closely flowered 

 branchlets, these and the pedicels scabrous, the latter sometimes with a few hairs at 

 the summit; spikelots 2.4 to 2.7 mm. long, about 0.7 mm. wide; first glume two-fifths 

 to scarcely half the length of the spikelet, acute; second glume slightly longer than 

 the sterile lemma, both keeled, usually spreading at the tip, scabrous on the mid- 

 nerve at the apex; fruit 1.6 mm. long, 0.6 mm. wide. 



« These two collections were distributed under the same number. 



