GRASSES OF OHIO 315 



13. Panicum bicknellii Nash. Bicknell's Panic-grass. A -len- 

 der, usually stiff, erect or decumbent perennial grass, )/2-\ l / 2 ft. high, 

 with the lower sheaths pubescent and a few-flowered panicle with 

 stiff, slender branches. Spikelet- oval or ovate, pubescent with 

 ascending hairs; outer empty glume l /$ the length of the spikelet. 



On dry, wooded hills. July, Aug. Gallia County. 



14. Panicum sphaerocarpon Ell. Round-fruited Panic-grass. A 

 dull green, usually erect, simple or somewhat branched perennial, 

 */2-2 ft. high, with somewhat pubescent nodes and an ovoid, long- 

 exserted, loosely flowered panicle with viscid spots on the axis and 

 ascending branches. Spikelets nearly spherical, obtuse, usually pur- 

 ple ; outer empty glume broadly ovate, very short. 



In dry or sandy soil. July-Sept. Cuyahoga, Summit, Trumbull, 

 Hocking, Scioto. 



15. Panicum polyanthes Schultes. Many-flowered Panic-grass. 

 A light green perennial grass with erect, simple stems, 1-3 ft. high, 

 with glabrous nodes and very long sheaths with finely ciliate margins, 

 and with a densely flowered, elliptic panicle with slender ascending 

 branches. Spikelets obovoid or nearly spherical ; outer empty glume 

 minute. 



In damp ground and woods. July-Sept. Fairfield, Hocking, 

 Jackson. 



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

 often purplish, perennial grass with erect, dichotomously branched 

 stems, Y /2-2 ft. high, from short, knotted rhizomes, with light green 

 to purplish leaves, and with a much exserted terminal panicle with 

 lax spreading branches and few spikelets. Spikelets usually glabrous, 

 ellipsoid ; outer empty glume minute. 



In woodlands and thickets. May-Aug. Rather general ; no 

 specimens from the northwestern counties. 



17. Panicum microcarpon Muhl. Small-fruited Panic-grass. A 

 perennial grass, at first erect but later with densely branched, spread- 

 ing or prostrate stems, 2-3 ft. long, strongly barbed on the nodes, 

 and with a long-exserted, rigid primary panicle and small few- 

 flowered secondary panicles. Spikelets purplish, glabrous ; outer 

 empty glume y$ as long as the spikelet. 



In moist soil and swampy places. June-Aug. Cuyahoga. Lorain, 

 Erie, Fairfield, Hocking, Jackson, Adams. 



18. Panicum boreale Nash. Northern Panic-grass. An erect 

 or decumbent, somewhat branched perennial, 1-2 ft. high, with a 

 narrow, loosely flowered panicle, the slender branches ascending or 

 spreading. Spikelets ellipsoid, pubescent; outer empty glume minute. 



In moist, open ground or woods. June, July. Fulton County. 



