Tm: (iRASSKs ok Tknnksskk. 85 



petluncled axillary racetnes. Sheaths pubescent with s])readinj^ 

 hairs, rarely nearly smooth, the lower usually puri)lish, the upper 

 ones elongated and somewhat inflated; lij^aile very short; leaf- 

 blade five to twelve inches long, three to six lines wide, usually 

 pa'pillate-])il{jse on both sides and along the narrowly-cartilagin- 

 ous margins, acute, tapering slightly toward the rounded base, 

 the upper leaf usually cordate. Racemes terminal and axillary, 

 two to four or six inches long, the terminal solitary or with one 

 or two approximate below it, the axillary finally exserted on long 

 naked peduncles; rachis very narrow, somewhat fiexuose and tri- 

 angular, scabrous. Spikelets imperfectly two- to four-rowed, 

 crowded or somewhat lax. one line long and nearly as broad, 

 rounded at the apex, smooth, or the larger glume minutely hairy 

 near the margins above. Flowering glume with a distinct de- 

 pression on the back near the base. (There is present occasion- 

 ally a small lower glume.) 



Not infrequent in grass lands, usually preferring rich, moist 

 soils. July — September. 



The leaves in this species are longer, culms more erect, and 

 spikelets larger and less crowded in the racemes than in the next. 

 P.setaceum Michx., as understood by the author, has narrower leaves, 

 and these with the sheaths more hairy, racemes more slender, the 

 terminal nearly always solitary, the spikelets densely crowded, 

 less rounded and about half as large. 



1 1. Paspalum longepedunculatum Le Conte. 



Plate VI. Figure 2:3. 



A slender perennial, with reclining or decumbent widely spread- 

 ing culms, ten to eighteen inches long, short leaves, and long-pe- 

 duncled. usually solitary, terminal and axillary racemes. Sheaths 

 ciliate along the margins and long-hairy at the throat, otherwise 

 smooth or the lower sometimes pubescent; ligule very short; leaf- 

 blade one to four inches long, three to five lines wide, lanceolate, 

 more or less clasping the stem by the rounded, subcordate base, 

 acute, papillate-ciliate along the narrowly-cartilaginous margins 

 and along the midnerve, surfaces smooth or somewhat pilose. Ra- 

 cemes one to two inches long, slender, usually somewhat falcate, 

 terminal and solitary, or with a second raceme below, on long ex- 

 serted slender, naked peduncles; rachis very narrow, linear, more or 

 less fiexuose, pubescent or pilose at the base. Spikelets plano-convex 

 or obtusely triangular, rounded-obtuse, hardly more than three- 

 fourths of a line long, the smooth and shining floral glume a little 

 exceeding the three-nerved outer glumes, and without any distinct 

 depression on the back at the base; first glume smooth or with a 

 few minute glandular hairs. — Sandy or gravelly soil. Knoxville, 

 and White ClilT Springs. Probably common. June to September. 



Note. — This may be the P. debile of Michaux. a species which 

 Kunth unites with P. setaceum Mx., whether correctly or not is un- 

 certain. The grass above described is certainly distinct from P. 

 setaceum or P. ciliatifolium. Xees (Agrost. Bras. 54) refers P. longepc- 

 duticulaiuni LeConte and P. debile Muhl. to P. arena? ium Schrad. 



