HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM, 239 
rounded base, acuminate, appressed-pubescent beneath, sparsely hispid on the upper 
surface, usually a few long hairs at the base; panicles short-exserted, usually 
included at the base until maturity, rather densely flowered, 4 to 7 cm. long, about 
two-thirds as wide, the branches ascending; spikelets 2.2 to 2.3 mm. long, 1.2 mm. 
wide, obovate, obtuse or minutely pointed; first glume about one-fourth as long as 
the spikelet, subacute; second glume and sterile lemma papillose-pubescent, strongly 
nerved, subequal, as long as the fruit, the margins at the summit usually inrolled, the 
midnerve produced into an apiculus; fruit 1.9 mm. long, 1.1mm. wide, elliptic. 
Autumnal form erect or spreading, culms sparingly branching from the upper and 
middle nodes after the maturity of the primary panicle, the stiff, reduced blades 
involute-pointed, much exceeding the panicles. 
This species is less pubescent than 
any other in this group except P. oc- 
cidentale. The smoother specimens 
somewhat resemble P. boreale. 
DISTRIBUTION. 
Dry sandy or gravelly soil, Vermont 
to Delaware; also in Minnesota; ap- 
parently rare. 
Vermont: Hartland, Jones 30. 
CoNnNEcTICcUT: Southington, Bissell 
385, 5581, 8084; East Lyme, 
Graves in 1903 (Hitchcock 
Herb.). 
InpIANA: Gary, Umbach 3686. 
Minnesota: Hennepin County, Sandberg in 1890; Ramsey County, Oestlund in 
1884 in part. 
DELAWARE: Centerville, Commons 283, 359. 
Fig, 254.— Distribution of P. scoparioides. 
141. Panicum shastense Scrib. & Merr. 
Panicum shastense Scribn. & Merr. U.S. Dept. Agr. Div. Agrost. Cire. 35:3. 1901. 
“Type specimens collected in a moist meadow at the edge of pine forests at Castle 
Crag, near Mt. Shasta, California, by Louis A. Greata, June, 1899.’’ The type, in the 
National Herbarium, consists of three vernal 
culms, 25 to 30 cm. high, with short-exserted, 
nearly mature panicles. 
DESCRIPTION. 
Vernal form pale green; culms tufted, 30 to 50 
em. high, slender, ascending from a more or less 
geniculate base, papillose-pilose with ascending 
hairs; nodes short-bearded; sheaths papillose- 
pilose, the hairs spreading; hairs of the ligule 
rather sparse, 2 to 3 mm. long; blades ascending, 
6 to 8 cm. long, 6 to 8 mm. wide, acuminate, scarcely narrowed toward the base, 
papillose-pilose on the under surface and with scattered long hairs on the upper; 
panicles short-exserted, 6 to 8 cm. long, about two-thirds as wide, the axis pilose, the 
flexuous branches ascending; spikelets 2.4 to 2.6 mm. long, 1.2 to 1.4mm. wide, 
obovate-oblong, obtuse, papillose-pubescent; first glume one-fourth to one-third as 
long as the spikelet, pointed; second glume scarcely equaling the fruit and sterile 
lemma; fruit 2.1 mm. long, 1.3 mm, wide, elliptic. 
Fig, 255,—P, shastense. From type 
specimen. 
