GRAM INK J2. (GRASS FAMILY.) 585 



panicle simple, few-flowered ; spikelets smoothish, obovate, l|'long; upper 

 glumes oval, three times the length of the lower one. Low ground, Florida 

 to North Carolina, and westward. 



30. P. viscidum, Ell. Softly villous all over, except the branches of 

 the panicle, and a narrow ring below each joint of the tall (3 -4 high) culm ; 

 leaves lanceolate, 6' -10' long, sheaths viscid; panicle compound, lax-flow- 

 ered, 4'- 6' long ; spikelets ovate, 1" long ; upper glume strongly 9-nerved, the 

 lowest minute. (P. scoparium, Michx.) Wet ground in the lower districts. 



31. P. depauperatum, Muhl. Culms low (2'- 12' high), simple, erect, 

 like the linear leaves ; panicle simple, few-flowered, with the branches erect, 

 often shorter than the subtending leaf ; spikelets oval-obovate ( 1" long), mostly 

 acute ; upper glume 9-nerved, smoothish, three times the length of the ovate 

 lower one. Dry sandy soil in the upper districts. June. Leaves rigid, 

 2' -6' long, smoothish or hairy. 



-< -M- Spikelets less than \" long ; sterile flower neutral. 



32. P. scabriusculum, Ell. Culms smooth or slightly scabrous, 3 - 4 

 high; leaves linear-lanceolate, acuminate, 5'- 10' long, the sheaths more or 

 less pubescent ; panicle smooth, diffuse, loug-peduncled, 5' - 6' long ; spikelets 

 smooth, oblong, f" long, mostly purple ; upper glumes longer than the oblong 

 acute floret, the lower minute. Wet banks of streams in the pine barrens 

 of the lower districts. 



33. P. microcarpon, Muhl. Glabrous ; culms strictly erect, 2 - 3 high ; 

 leaves thin, lanceolate, acuminate, cordate, 4'- 6' long, the uppermost about 

 the length of the panicle ; panicle 4' -6' long, the setaceous branches diver- 

 ging ; spikelets very numerous, oval, smooth, \" long ; upper glumes as long 

 as the oval floret, the lower minute. Rich shaded soil, chiefly in the upper 

 districts. 



34. P. Floridanum. Culms erect, 1^ - 2 high ; leaves narrowly lanceo- 

 late, rigid, 2' -4' long, the sheaths pubescent, the uppermost much shorter 

 than the oval panicle ; spikelets oval, -f" long, almost villous ; upper glumes 

 as long as the floret, the lowest minute ; palet of the sterile flower minute 

 or wanting. (P. microcarpon, var., Vasey. P. sphterocarpum, Flora.) In 

 and around shallow ponds, near the coast of West Florida. 



35. P. sphserocarpon, Ell. Culms 10'-15' high, bearded at the 

 nodes ; lowest leaves oblong-ovate, short and crowded, the upper lanceolate, 

 cordate- clasping, 2' -4' long, with the base ciliate, scabrous above; panicle 

 oval, 2' -3' long, loosely many-flowered; spikelets oval or roundish, f" long, 

 minutely pubescent ; upper glumes thrice as long as the lowest ; floret oval, 

 obtuse. Dry open woods, Florida to Tennessee. 



36. P. consanguineum, Kunth. Smooth or villous; culms 10'- 15' 

 high, soon excessively branching; leaves linear or linear-lanceolate, 2' -4' 

 long; panicle 2'- 3' long, often simple, loosely flowered ; spikelets oblong or 

 obovate, varying from \" -\\" long, upper glumes strongly 7-nerved ; palet 

 of the sterile flower wanting. (P. villosum and P. angustifolium, Ell., the 

 smooth form. P. neuranthum, Griseb., a low form growing in dry sandy soil.) 

 Damp shaded soil, common. 



