ELISHA MITCHELL SCIENTIFIC SOCIETY. 43 
land, 1892. New York: Rowlee; Ithaca, 1895. Maine: Fernald; 1895. 
This is the most comimon vernal species from North Carolina northward. 
Elliott seems to have overlooked this species. His P. dichotomum is 
either LP. demissum or P. arenicolum or some closely related species, 
which, in habit, resembles P. azzustifolinm, as he compares his P. di- 
chotomum with P. angustifolium in both habit and form. 
PANICUM DICHOTOMUM ELATUM Vasey Contrib. from. 
U.S. Nat. Herb. vol. 3 No. 1:30 (1892). Stems stouter, 
leaves longer, 25'—3' long, panicle very much larger than 
in the type, 3’—4" long and fully as wide. Maryland and 
southward. District of Columbia: Scribner 1894, North 
Carolina: Ashe; Chapel Hill, 1897. 
PANICUM DICHOTOMUM VIRIDE Vasey, Contrib. from 
U.S.Nat. Heb. Vol. 3, No. 1:30 (1892) is a tender, slend- 
er, few flowered form, growing in very deep Shady 
woods. It is very common to the northward, but is less 
common to the south. It does not branch or only spar- 
ingly during the summer, the basal nodes and sheaths 
are glabrous, and it is probably specific. It approaches 
P. lucidum. 
P. dichotomum has been burdened with numberless va- 
rieties by later American authors, most of these varieties 
being well-marked species, which were so regarded by 
early American botanists. 
34) PANICUM BOREALE Nash, Torr. Bul. 22: 421(1895). 
Culms generally tufted, ascending or erect, 14’—20” high, 
glabrous. Sheaths glabrous, except for the ciliate mar- 
gin, often as long as the internodes; ligule of very short 
hairs. Leaves glabrous, lanceolate, or sometimes ciliate 
at the base, 3’--S’ long 3’ wide or less, taper-pointed, 
narrowed to the rounded base, ascending. Panicle 2’—3’ 
long, nearly as broad, branches numerous, fascicled, very 
slender; spikelets 1”’ long, elliptic, acutish, nearly olab- 
rous, rather numerous, on long filiform ascending or 
spreading pedicels. Autumnal form unbranched. 
