196 



leaves, glabrous above, and the larger more open panicle readily- 

 separate this from P. nmlacon, which is described below. 



I was at first inclined to consider this the P. croale of Elliott, 

 but after a careful comparison with the description and with a 

 specimen so named by Elliott, I feel justified in the above disposi- 

 tion of it. 



Panicum glabrifolium n. sp. 



Whole plant, except just below the lower nodes, smooth and 

 glabrous and somewhat shining, especially the panicle and spike- 

 lets. Culms caespitose, 1.5-4 dm. tall, erect, rigid, slender, leafy 

 to the top, the longer culms pubescent for a greater or less dis- 

 tance below the lower nodes, at length somewhat branched ; nodes 

 purplish, the lower ones generally upwardly barbed ; sheaths 

 strongly striate, the lowermost ones pubescent, particularly at the 

 base, 3 cm, long or less, closely embracing the culm, a tuft of 

 hairs on each margin at the apex ; ligule a fringe of hairs .5 mm. 

 long; leaves narrowly linear, 7-9-nerved, erect, rigid, thickish, 

 long acuminate, narrowed toward the base, those on the sterile 

 shoots 15 cm. long or less, 3-4 mm. wide, those on the fruiting 

 culms 3-9 cm. long, 1-3 mm. wide; panicle ovate, 4-6 cm. long, 

 3-4 cm. wide, its branches spreading or somewhat ascending, sin- 

 gle, the longer branches about 2 cm. long, bearing 3 or 4 distant 

 ultimate divergent divisions which are 2-6 times as long as the 

 spikelets ; spikelets slightly exceeding .5 mm. in length, tinged 

 with purple, obovate, the first scale less than one-half the length 

 of the spikelet, membranous, orbicular-ovate, obtuse, i -nerved, the 

 second and third scales broadly oval, membranous, 5-7-nerved, 

 the latter enclosing a hyaline palet one-half its length, the fourth 

 scale oval, chartaceous, white, enclosing a palet of equal ength 

 and similar texture. 



Collected by the writer in the " flatwoods " at Tampa, Florida, 

 on August 20, 1895, no. 2415a. It grows in dense tufts, the long 

 narrow erect leaves and the wiry culms giving it a striking ap- 

 pearance. 



Panicum Lindheimeri n. sp. 



Whole plant, with the exception of the lower sheaths, usually 

 the lower internodes, and the spikelets, smooth and glabrous. 

 Culms slender, erect, at length branched, the lower internodes 

 sparingly papillose-hirsute, or sometimes glabrous; nodes often 

 barbed with spreading or somewhat reflexed hairs; sheaths shorter 

 than the internodes, somewhat loosely embracingthe culms, ciliate 

 on the margins, the lower ones sparingly papillose-hirsute; ligule 

 a fringe of hairs about 2 mm. long ; leaves ascending, 2-7 cm. long. 



