296 



Bulletin No. 205 



[March, 



seldom half the length of the plant ; spikclcts smooth, 3 to 3.5 nun. long. 



This is not a common species in Illinois. It is found in sandy soil, 

 usually where it is moist. It is readily distinguished from P. capillare 

 by its slender habit of growth, less dense pubescence on the sheaths, 

 smaller, narrower panicles, narrower leaves, and larger, more pointed 

 spikelets. Its habit of growth is more like that of P. pMladelpliicum , 

 from which it is distinguished by its narrower panicle, and longer, 

 pointed spikelets. 



COOK CO. Chicago, A. Chase 1474, 1479, 1729, 2006; Chicago, Tlill in 1901; 

 Irondale, Chicago, A. Chase 1473; Grand Crossing, Eolert Bebb 2928; Grand 

 Crossing, McDonald, Sept., 1893. lake CO. Beach, Umbach 2543. ST. clair co. 

 Without locality, Eggert 241. wabash co. Without locality, Shearer, Oct., 1915; 

 Mt. Carmel, Schneck, Sept., 1879. 



52 53 54 55 56 57 



Figs. 52-57. — Spikelets: 52, P. harbipulvinaium; 53, P. capillare; 

 flexile; 55, P. gatiingeri; 56, P. miliacenim ; 57, P. pliiladelphicum 



54, P. 



Panicum gatting-eri Nash 



(Fig. 55) 



Hitchcock and Chase '10, 57. 



Culms 8 inches to 3 feet long, erect at first, but soon spreading and 

 rooting at the lower nodes; culms, nodes, and sheaths densely pubes- 

 cent, the hairs almost as long as the width of the culm ; blades 4 to 8 

 inches long, 6 to 10 mm. wide, sparsely pubescent or smooth ; panicles 

 numerous, oval in outline, never as much as half the length of the 

 plant; spikelets usually 2 mm. long. 



This species is very closely related to P. capillare but differs in the 

 spreading habit, the more oval outline of the panicle and the shorter, 

 broader spikelets. It is usually a weed and is found in the same situ- 

 ations as P. capillare. It may easily be eradicated by cultivation, which 

 prevents the formation of seed. 



champaign CO.- Urbana, Seymour, Oct., 1880. fulton co. Canton, Wolf 

 in 1882. PEORIA CO. Peoria, Brendel. stark co. Wady Petra, V. H. Chase, 

 Sept., 1900; 124 in 1897. vermilion co. Catlin, Lansing, Sept., 1912. wabash 

 r'O. Without locality. Shearer, Aug., 1915. 



