June, 1914.] TJw Panicums of Ohio. 351 



very slender, spreadin.tj or drooping; sheaths as long or longer than 

 the intemodes; leaves glabrous or pilose, especially on the lower 

 surface; 4-10 inches long, re to | inch wide; primary |)anicle 

 l(X)sc and open; spikelets obtuse or acutish, pubescent with sijread- 

 ing hairs; outer empty glume J'4 to ^ as long as the spikelet. In 

 woods. Rather general. 



12. Panicum werneri Scrib. Werner's Panic-grass. A 

 smooth, light colored, tufted, sparingly l)ranched or simple 

 perennial (5-1 S inches tall. Leaves erect, linear, acuminate 2-4 

 inches long, | to A i^^ch wide; panicle loose and open and 

 iTsually included within the leaves; spikelets 1^ inch long, 

 somewhat pubescent; cuter empty glume ^4 as long as the spike- 

 let, 1 nerved; the second empty glume 7 nerved. In the dryer 

 parts of swam] )s. Lake, Cuyahoga, Franklin, Athens. 



13. Panicum bicknellii Nash. Bricknell's Panic-grass. A 

 slender, erect or decumbent perennial 8-1 (> inches tall. Lower 

 intemodes puberulent; sheaths ciliate on the margins, the lower 

 ones pubescent; leaves ciliate and narrow at the base, erect, linear- 

 lanceolate, primary leaves 3-7 inches long, | to fa "ich wide; 

 panicle 3-4 inches or less long, the primary ones longer than the 

 .secondary ones ; spikelet oval, or ovate, pubescent, hairs ascend- 

 ing; outei empty glume 1 -nerved; the second empty glume 9- 

 nerved. Dry worlds. Oallia cmnty. 



14. Panicum sphaerocarpon Ell. Round -fruited Panic- 

 grass. An almost simple, usually erect perennial with somewhat 

 pubescent nodes. vSheaths shorter than the intemodes, ciliate 

 on the margin, glabrous; leaves 1-4 inches long, | to | inch wide, 

 acuminate, ciliate toward the base; panicle ovoid, long-ex serted, 

 \-'S}4 inches long, loosely flowered; spikelets greeni.sh to purplish, 

 j^ inch or less long. Dry or sandy soil. Cuyahoga, Summit, 

 Tnunbull, Hocking, Scioto. 



15. Panicum polyanthes Schultes. Many-flowered Panic- 

 grass. An erect, smooth, light-green ]jerennial 1 to ;> feet tall. 

 Sheaths usually longer than the intemodes; leaves ciliate toward 

 the base, long-acuminate, all of about the same size, 5 to S inches 

 long; y2 to 1 inch wide; panicle 3 to 9 inches, longer than wide, 

 l-iranches slender; spikelets rs i'lch long, numerous, ovoid to 

 sijhcrical; outer emjjty glume minute; .second em]jty glume 7 

 nerved. Woods. Fairfield. Hocking, Jackson. 



16. Panicum dichotomum L. Forked Panic-grass. A 

 smooth perennial or having the lower nodes barked, erect, purjjlish 

 from a rootstock. Sheaths about l^ the length of the intemodes; 

 leaves light green to purplish, spreading, 2 to 4 inches long, I to 

 J inch wide; panicle ij^ to 3^^ inches long, primary ])anicle 

 much cxsertcd, secondary panicle included; few spikelets borne at 

 the ends of the long, flexuous branches of the panicle; spikelets 

 ^ inch long, glaln'ous, or rarely pubescent; outer empty glume 



