284 



Bulletin No. 205 



[March, 



Leptoloma cognatum (Selnilt.) Cliasc 

 Fall Witch Grass (Figs. 33 and 34) 



Panicum autumnale, Lapham '57, 548, 594; Flagg '78, 284; Brendel '87, 64; 

 Huett '97, 128; McDonald '00, 103. Paninim cognatum, Gleason '07, 181. Lep- 

 toloma cognatum, Gleason '10, 147. 



Culms erect, or spreading at base, much branched, 1 to 2.5 feet 

 long, roughened with short, stiff haii's; lower sheaths sometimes 



Figs. 33-34. — 33, L. cognatum, infloroscenec; 34, L. cognatum, 



spikelct 



slightly pubescent, the upper smooth; blades ] to 3 inches long, 4 

 to 6 mm. wide, smooth except for slightly roughened edges; panicle 

 spreading, hairy in the axils; spikelcts appressed pubescent, 2.7 to 3 

 mm. long, single on the ends of long pedicels. 



This grass is not abundant in Illinois. It occurs mainly in the sand 

 areas thruout the state. 



ILLINOIS SPECIMENS: Without locality, Vasey. fulton co. Without local- 

 ity, Pepoon. HENDERSON CO. Sandy banks of the Mississippi near Oquawka, 

 Patterson, Sept., 1873; Oquawka, Patterson, Sept., 1881. JO daviess CO. 



