162 



GRAMINEAE. 



VOL. I. 



74. Panicum latifolium L. Broad-leaved 

 Panic-grass. Fig. 384. 



P. latifolium L. Sp. PL 58. 1753. 



Panicum macrocarpon Le Conte; Torr. Cat. 91. 1819. 



Culms i-3 tall, erect, simple, later somewhat 

 branched above, smooth; the nodes, at least the 

 upper ones, naked. Sheaths smooth and glabrous, 

 excepting the pubescent ring at the apex and the 

 ciliate margin; blades 3'-?' long, 9"-ii' wide, 

 cordate-clasping at base, acuminate, smooth and gla- 

 brous or nearly so on both surfaces, ciliate; panicle 

 3'-6' long, generally long-exserted, rarely included, 

 its branches with few spikelets and more or less 

 ascending; spikelets \\"-2" long, turgid, oval to 

 obovoid ; second and third scales broadly oval, ob- 

 tus, Q-nerved, pubescent, the fourth oval, rather 

 acute, li" long. 

 In woods, Maine to Minnesota, south to North Carolina and Kansas. July-Aug. 



75. Panicum Boscii Poir. Bosc's Panic-grass. Fig. 385. 



P. Boscii Poir. Encycl. Suppl. 4: 278. 1816. 



P. latifolium Walt. Fl. Car. 73. 1788. Not L. 1753. 



Panicum Walteri Poir. in Lam. Encycl. Suppl. 4: 282. 1816. 



Not Pursh, 1814. 



P. Porterianum Nash, Bull. Torr. Club, 22: 420. 1895. 

 P. pubifolium Nash, Bull. Torr. Club, 26: 577. 1899. 



Culms erect, i-2$ tall, simple, later somewhat dicho-' 1 

 tomously branched above, the nodes densely barbed. 

 Sheaths glabrous or softly pubescent ; blades ovate to 

 broadly lanceolate, 2'-$' long, i'-ii' wide, cordate-clasping 

 at base, acute, glabrous or softly pubescent ; panicle in- 

 cluded or somewhat exserted, 2^-4' long; branches spread- 

 ing or ascending, bearing few elliptic short-pedicelled 

 appressed spikelets 2"-2$" long; first scale one-third to 

 one-half as long as the pubescent and equal second and 

 third ones; fourth scale about as long as the third. 



In woods, Massachusetts to Missouri, Oklahoma, Florida and 

 Texas. June-Aug. 



Panicum clandestinum L. Corn Grass. Deer-tongue Grass. Fig. 386. 



Panicum clandestinum L. Sp. PI. 58. 1753. 

 Panicum pedunculatum Torr. Fl. U. S. 141. 1824. 

 Panicum decoloratum Nash, Bull. Torr. Club, 26: 570. 

 1899. 



Culms erect or ascending, i*-4 tall, rather stout, 

 simple at first, much branched later in the season. 

 Sheaths longer than the internodes, much crowded 

 on the branches, papillose-hispid, especially the 

 upper ones; blades 2 f -S' long, |'-ii' wide, cordate- 

 clasping at base, acuminate, smooth and glabrous, 

 the margins ciliate at base ; primary panicle some- 

 times long-exserted, $'-5' long, its branches ascend- 

 ing; panicles of the branches included in the sheaths, 

 rarely slightly exserted; spikelets i"-ij" long, pu- 

 bescent, elliptic ; first scale about one-third as long 

 as the spikelet ; second and third oval, acutish, 

 9-nerved, the fourth oval, obtuse, apiculate, whitish, 

 shining. 



In thickets and moist places, Maine to' Kansas, south 

 to Florida and Texas. June-July. 



