HITCHCOCK AND CHASE—-NORTH AMERICAN PANICUM. 105 
District oF CoLuMBIA: Greene in 1908, Steele, Vasey. 
VireiniA: Four-Mile Run, Chase 2679; Goshen, Steele in 1904. 
West VirGINIA: Grafton, Guttenberg in 1879, Smith in 1879. 
Nortu Carouina: Newbern, Kearney 2249; eastern North Carolina, McCarthy in 
1885; Henderson County, Smith in 1881. 
‘ean eae : Aiken ee ir W693, sle of Palms, Hitchcock 225. 
ENTUCKY: Bell County, Kearney 380;4 Hatlan County, Kearney 380.4 
_ TrnNESSEE: Hollow Rock, Biltmore Herb. 808a, Eggert in 1897; Cocke County, 
Kearney 969; Madison County, Bain in 1892. 
- AzasBama: Scottsboro, Chase 4497. : 
Lovistana: Calhoun, Ball 70; Calcasieu, Cocks 3008. 
Texas: Texarkana, Plank 77. 
V 58. Panicum longifolium Torr. 
Panicum longifolium Torr. Fl. North. & Mid. U. S. 149. 1824. ‘‘In the pine 
barrens of New Jersey. * * * For specimens * * * JT 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anceps and bearing an unpublished varietal name in Vasey’s 
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. 
Fic. 98.—P. longifolium. 
From type specimen. 
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 cili¢é~ 
usually at the sides only, not meeting at the back; blades erect or sometimes recurved 
or t@tuofis, 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; spikelets 2.4 to2.7 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. : 
«a These two collections were distributed under the same number. 
