HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 63 
prominent, hispid, the axis and branches scabrous only or sometimes sparsely pilose; 
spikelets 2.5 to 3.3 mm. long (usually about 3 mm. long), 1 mm. wide, turgid, 
lanceolate-elliptic, acuminate; first glume about two-fifths the length of the spikelet, 
pointed, the midnerve scabrous toward 
the apex; second glume slightly longer 
than the sterile lemma, both much ex- 
ceeding the fruit, 9-nerved, the nerves 
scabrous toward the apex, the palea of 
the sterile lemma wanting; fruit 1.7 to 
1.8 mm. long, 0.9 mm. wide, elliptic. 
This species differs from P. capillare 
in being on the average lower, in hay- 
ing shorter, less pubescent blades 
crowded toward the base of the plant, 
shorter, exserted panicles with divari- Fig. 45.—Distribution of P. barbipulvinatum. 
cate branches, and larger spikelets. 
The plants are often depauperate and tufted and the blades sometimes white- 
margined. 
Occasional specimens, as Mearns 743, Parish 1081 and Rydberg 1538, scarcely branch- 
ing at the base and with longer blades, approach P. capillare. 
DISTRIBUTION. 
Open ground, waste piaces and cultivated fields, Wisconsin, Minnesota to British 
Columbia, south to Texas and southern California. 
Inurnois: Oquawka, Patterson. 
Wisconsin: Madison, Agr. Exp. Sta. (probably transient adventive). 
Minnesota: Fort Snelling, Mearns 755; Hennepin County, Sandberg in 1889; 
Duluth, Hitchcock 5083. 
Nort Daxorta: Medora, Brannon 134, Bismarck, Field 1867; Devils Lake, Hitch- 
cock 5050. 
South Daxora: Hot Springs, Rydberg 1096; White Horse Camp, Griffiths 278; 
Cheyenne River, Wallace 2; Bellefourche, Griffiths 399; Huron, Griffiths 7. 
NeEBRASKA: Simeon, Bates 1114; North Platte, Plank 38; Central City, Rydberg 
2011, Shear 264; Niobrara, Clements 2705; Hooker County, Rydberg 1538; 
Grant County, Rydberg 1788. 
Kansas: Bucklin, Hitchcock in 1892; Ulysses, Thompson 56; Syracuse, Thomp- 
son 134; Tribune, Reed in 1892; Osborne City, Shear 152. 
Texas: Abilene, Tracy 8295; Paloduro, Gardner 24; without locality, Nealley 
in 1889. 
_ Montana: Great Falls, R. S. Williams 843; Silesia, Griffiths & Lange 15; Upper 
Big Horn River, Blankinship 179; Missoula River, Scribner 328; Glendive, 
Ward in 1883; Billings, Williams & Griffiths 246; Manhattan, Shear 436. 
Wyomine: No Wood Creek, Williams 2847; Sand Creek, H. Nelson 4984; Sybille 
Creek, H. Nelson 481; Badger, A. Nelson 8346; Cheyenne River, Geyer in 
1839; Buffalo Fork, Tweedy 93, 95; Newcastle, Griffiths 684; Yellowstone 
National Park, Chase 5251, 5253, Hitchcock 2114, Rydberg & Bessey 3544. 
Ipano: St. Anthony, Merrill & Wilcox 152; Merrill 43; Shoshone, Evermann in 
1893; Rathdrum, Sandberg, Heller & MacDougal 713; Caldwell, Chase 4746. 
Wasuineton: Kittitas County, Sandberg & Leiberg 431; Waitsburg, Horner 526; 
Streptoe, Vasey 3065; Prosser, Cotton 625, 891; Spokane, Chase 4986; Lake 
Chelan, Elmer 484, 848. 
British Cotumsia: Sicamous, Macoun 6 in 1889. 
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