HITCHCOCK AND CHASE—-NORTH AMERICAN PANICUM. 157 
3.5 to 6 cm. long, 3 to 6 mm. wide, a few long hairs at the rounded base, scabrous on 
both surfaces, not pubescent; spikelets 2.1 to 2.4 mm. long, 1.2 to 1.3 mm. wide, nearly 
or quite glabrous. 
Autumnal form similar to the vernal, remaining simple or late in the season bearing 
simple branches-from the lower, rarely from the basal, nodes, 
The above-mentioned types are both of this form, but material examined shows a 
much less clear distinction from P. linearifolium, with which this species seems to 
Fia. 142.—P. werneri. From 
type specimen. 
intergrade. The division is here based on a com- 
bination of stiffer habit, glabrous sheaths, shorter, 
broader, and firmer blades, and less pubescent 
spikelets. In many specimens, however, having 
the other characters enumerated the blades are as 
long as in many specimens of P. linearifolium. The 
following represent these intergrading specimens: 
Biltmore Herb. 8342, Chase 3299, 3382, Jones, Bur- 
lington, Vermont, in 1892, Knight 55, 57, Parlin 
1190, Porter, Easton, Pennsylvania, in 1895, 1897, 
and 1898. 
In habit, especially as seen in the field, P. werneri often suggests P. depauperatum, 
The following specimens, with slightly pointed spikelets 2.5 to 2.8 mm, long, approach 
that species: Briggs 1248, Graves 7, Eggleston 1757, H, W. Merrill 44. 
DISTRIBUTION. 
Sterile woods and knolls, Maine to Minnesota, south to Ohio and Texas. 
Marne: Penobscot County, Fernald 506, Knight 55, 57; Chesterville, Chase 3299; 
Fayette, Chase 3382; North Berwick, Parlin 1190, 1502, 1806; Hiram, H. W. 
Merrill 44, 47; Orono, Briggs 1248. 
New Hamesurre: Laconia, Carter 101, 242 (Hitchcock Herb.). 
Vermont: Burlington, Jones in 1892; Eggleston 1757. 
Massacuusetts: Sheffield, Hoffmann in 1901. 
Connecticut: Ledyard, Graves 16; 
Volunteer, Graves 17; Frank- 
lin, Woodward in 1906; South- 
ington, Chamberlain & Bissell 
in 1903; Waterford, Graves 7. 
New Yore: Tripoli, Burnham in 
1897; Ithaca, Ashe, Rowlee in 
1892; New York, Bicknell 
in 1895. 
Ontario: Toronto, Biltmore Herb. 
8342; Kingston, Fowler in 1898; 
Kingston Mills, Klugh in 1907, Fig. 143.—Distribution of P. werneri. 
Algonquin Park, Macoun 21957. 
New Jersey: Berkeley Heights, Mackenzie 2251. 
PENNSYLVANIA: Easton, Porter in 1895, 1897, and 1898. 
Outo: Painesville, Werner 60, 65 (both in Hitchcock Herb.). 
Micuican: Flint, Clark (Field Mus. Herb.). 
Wisconsin: Rainbow Rapids, Cheney 1345. 
Minnesota: Chisago County, Sandberg in 1886. 
Missouri: Swan, Bush 2913, 2926. 
DELAWARE: Centerville, Commons 358. 
Texas: Dallas, Reverchon in 1876 (Gray Herb.). 
