June, 1914.] The Panicums of Ohio. 353 



to f inch wide, slightly involute toward the end, pilose on both 

 surfaces, hairs appressed on the upper surface; primary panicle 

 long-exserted or equaled by the uppermost leaf, loosely flowered ; 

 spikelets a little more than ^ inch long, obovate to eliptic, 

 densely pubescent with short spreading hairs; outer empty glume 

 a little less than ^ as long as the second empty glume; second 

 empty glume a little shorter than the fruit. Sand}' or dry soil. 

 Cuyahoga, Eric, Licking. 



22. Panicum implicatum Scrib. Slender stemmed Panic- 

 grass. A slender, more or less pubescent tufted and erect peren- 

 nial. Sheaths shorter than the intemodes, papillose-pilose; ligule 

 at the top of the leaf sheath j^ inch or less; leaves 1 to 3 inches 

 long, i to J inch wide, erect, lanceolate, fimi, upper surface 

 pilose, hairs erect, hairs on the lower siirface appressed; ])anicle 

 open, wide-spreading, flcxuous, 1^4 to 2 inclK^s long, branches 

 sometimes tangled; spi]<:elets about ^ inch long, obovoid, 

 obtuse, papillose-pilose; outer empty glume almost ^^ as long as 

 the spikelet, pubescent; second empty glume equaling the fruit. 

 Wet soil. Gallia county. 



23. Panicum tsugetorum Nash. Hemlock Panic-grass. A 

 iDluish-green or purplish, sbnder perennial, 10 to 20 inches ascend- 

 ing or spreading, often geniculate below. Sheaths appressed 

 pubescent, shorter than the intemodes; leaves 2 to 2^4 inches long, 



1 to J inch wide, minutely appressed-pubescent beneath, 

 glabrous above or with a few hairs near the base or margin; panicle 

 loosely flowered, branches ascending or spreading; spikelets about 

 1^ inch long, broadly ovate, pubescent; outer empty glunie | 

 as long as the spikelet; second empty ghrnie equalling the fruit. 

 Sandy woods. Defiance, vStnnmit. 



24. Panicum leibergii (Vasey) Scril3. Leiberg's Panic-grass. 

 A perennial 1 to 2>2 feet tall, scabrous at least below the nodes. 

 Sheaths sometimes longer than the intemodes, papillose-hispid, 

 hairs spreading; ligule minute; leaves ascending, lanceolate, ciliate 

 near the base, pa]jilose-hispid on both sides or almost glabrous 

 above, 3 to (> inches long; panicle 3 to inches long, less than ^ 

 as wide, branches ascending; spikelets | inch long, papillose- 

 hirsute with spreading hairs; outer empty glume ^2 as long as 

 the spikelet, 1 to '.] nerved; second empty glume oval, V to 9 nerved. 

 Dry soil. No specimens. 



25. Panicum scribnerianum Nash. Scribner's Panic-grass. 

 An erect perennial (i to 14 inches high, in clumps. Sheaths 

 ipapillosc-hispid or nearly glabrous; ligule ^'32 inch long; leaves 



2 to 4 inches long; | to iV inch wide, sometimes ciliate toward 

 the base; panicle short-exserted, \}4 to 3 J/2 inches long; spikelets 

 I inch long, turgid, obtuse, slightly pubescent, outer empty 

 glume minute, second empty glume shorter than the fruit. Sandy 

 or dry soil. Cuyahoga, Erie, Wood, Franklin. 



