6GG GBAMINE^. 



P. conjugatum, Berg. Smooth and branching (2° long) ; leaves thin, 

 linear ; spikes 2-3, flat, the two terminal ones conjugate; spikelets minute, 

 in two rows, ovate, long-hinged. — New Orleans {Dr. Hale). Introduced. 



P. dilatatum, Poir. Culms stout (3° -4° high) ; leaves flat, linear-lan- 

 ceolate, smooth; spikes 4-6, racemose; spikelets in 4 rows, ovate, acute, 

 villous, much wider than the flat rachis ; glumes and sterile palea 5-nerved, 

 longer than the roundish perfect flower. — Alabama, New Orleans, and 

 westward. 



PANICUM, L. 



P. serotmum, Michx. Perennial, creeping, much branched ; leaves 

 short (V long), lanceolate, villous, like the sheaths ; spikes mostly 5, digi- 

 tate ; spikelets minute ; glume half as long as the paleae. (Digitaria villosa, 

 Ell.) — Fields and road-sides, Florida to North Carolina. 



P. prostratum, L. Creeping, branching; leaves short (1/-2' long), 

 ovate-lanceolate, filiate; panicle short, composed of 5-10 simple racemes; 

 spikelets ovate-oblong, acute, short-pedicelled ; upper glume and lower palea 

 of the triandrous sterile flower 5-nerved. (P. Aurelianum, Hale.) — Mobile 

 and New Orleans. 



P. paspaloides, Pers. Culms erect; leaves long, acuminate; panicle 

 narrow, the branches apprcssed ; spikelets in two rows, ovate; glume 5- 

 nerved ; sterile flower triandrous, much shorter than the fertile one. — South 

 Florida {Blodgett, Garber). 



P. repens, L. Culms erect from creeping rootstocks (1° high), very 

 leafy; leaves rigid, lanceolate, distichous, becoming convolute; panicle 

 loose (T-2'long); spikelets smooth, the upper glume and lower palea of 

 the staminate sterile flower strongly 7-nerved. — Sandy coast, Mobile (Mohr). 



P. agrostoides, Spreng. Very near some forms of P. anccps, but the 

 panicle more branched and contracted, the purplish spikelets smaller, and 

 not clustered, and the upper glume 5-nerved. — Ditches, &c, Florida, and 

 northward. 



P. Striatum, Lam. Culms sparingly branched (2°-3° high) ; leaves lan- 

 ceolate, with scabrous margins (G'-8'long)j panicle somewhat corymbose, 

 consisting of several civet simple racemes; spikelets oblong, acute; the 

 upper glume and sterile palea strongly 7-nerved ; perfect flower rugulose. — 

 Banks of the Caloosa River, South Florida. 



P. leUCOphseum, H.B K. Culms tall, branching; leaves broadly linear, 

 rough above, bearded at the throat (1° long) ; panicle contracted, racemose 

 (10'- 15' long), the simple branches erect ; spikelets scattered on one side of 

 the slender rachis, lanceolate, silky -pilose ; lower glume minute or wanting, 

 the upper one linear, 3-ncrved, shorter than the perfect flower ; lower palea 

 of the neutral flower longer than the fertile one, 5-nerved. — Chuekolisky 

 K. 3 . South Florida ( Garth r). 



P. maximum, Jaq. CuIm§(4°-6° high) smooth j leaves linear; panicle 

 verv large, composed of long (u'-12') straight clustered branches ; spikelets 



