292 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
New Yor«: Oneida Lake, Gray; Lake George, Vasey in 1882; Schenectady, 
Wibbe in 1885; Danby, Coville in 1885; Cairo, Nash in 1893; Tripoli, Burnham 
in 1897. 
Ontario: Belleville, Macoun in 1865; Galt, Herriot in 1898 and 1901; Algonquin 
Park, Macoun 22025. 
PENNSYLVANIA: Tannersville, 
Brown in 1901; without local- 
ity, McMinn. 
MicHicgAN: Keweenaw, Jarwell 
764; Alma, Davis in 1893. 
WIisconsIN: Rainbow Rapids, Che- 
ney 1346; Mason, Cheney 4786; 
Webster, Cheney 3426. 
Minnesota: Ramsey County, Ost- 
land 1 and 2 in 1884; Lake 
Kilpatrick, Ballard in 1893; Fig. 328.—Distribution of P. zanthophysum. 
St. Cloud, Campbell 66. 
Manirosa: Lake Winnepeg Valley, Bourgeau in 1857 (Gray Herb.). 
SASKATCHAWAN: Bourgcau in 1858 (Gray Herb.). 
Pedicellata.—Clums slender, more or less hirsute; ligules of short hairs; blades not 
over 6 mm. wide, ciliate; spikelets 3.5 to 4 mm. long, attenuate at base, 
papillose, 7 to 9-nerved. Autumnal form freely branching, the branches 
appearing before the maturity of the primary panicle; no distinct winter 
rosette formed. 
This group of two species appears to be intermediate between the subgenus 
Dichanthelium and true Panicum. The plants bear a general resemblance 
to Oligosanthia but in the absence of a winter rosette and in the branch- 
ing habit, especially of P. nodatum, they show a departure from 
Dichanthelium. 
Culms erect or leaning; blades thin, 5 to 9 cm. long, narrowed 
towardithe hase suack Hakone ye Nit Cie arene aes 176. P. pedicellatum. 
Culms decumbent; blades thick, not over 5 cm. long, not nar- 
rowed toward the base............-......---- inet Soe 177. P. nodatum. 
CG 176. Panicum pedicellatum Vasey. 
Panicum pedicellatum Vasey, U.S. Dept. Agr. Div. Bot. Bull. 8: 28. 1889. ‘Texas, 
J. Reverchon.’’ The type specimen, in the National Herbarium, Reverchon Texas 
Plants 1620, bearing the data ‘‘Rocky 
woods, Kimble Co. June,’’ consists of two 
branching plants. 
DESCRIPTION. 
Vernal form in tufts of few to several 
erect or ascending culms from a short, 
knotted rootstock; culms slender, 20 to 
50 cm. high, usually ascending-hirsute 
at least below, a few spreading hairs on 
the nodes; sheaths papillose, sparingly 
hirsute, ciliate on the margin; ligules 
dense, about 1 mm. long; blades ascend- 
ing or spreading, 5 to 9 cm. long, 3 to 6 
mm. wide, the margin toward the narrowed base sparsely ciliate with long hairs, 
both surfaces glabrous or sometimes minutely hispid; panicles 3 to 6 cm. long, 
Fic. 329.—P. pedicellatum. From type specimen. 
