574 GRAMINEiE. (gRASS FAMILY.) 



glumes long-pointed, the upper 7-ncrvcd, one third lonj^er than tlic obtuse per- 

 fect flower ; stcrilu flower 3-androus. — Sandy soil, Florida, and nortliward. 

 Aug. and Sept. y. — Culms several in a cluster. Leaves smooth, flat (green), 

 1° or more long. Glumes purplish. 



10. P. amarum, Ell. Glaucous; culms stout; branches of the slender 

 contracted panicle smooth, appressed ; leaves long and rigid, soon convolute ; 

 spikelets ovate-lanceolate (2" long), short-stalked ; upper glume pointed, strongly 

 7-nerv( d. one third longer than the oblong obtuse perfect flower, and cquiiiliiig 

 the 3-androus sterile flower. — Drifting sands along the coast, Florida, and north- 

 ward. Sept. IJ. — Plant salt and hitter to the taste. 



11. P. fasciculatum, Swartz. Smooth; culms erect (1° high), branch- 

 ing; leaves nicml)raiKueoas, linear-lanceolate; ])anicle contracted, 3'- 4' long, 

 with t!ic mostly simple branches erect ; spikelets deep green, obovate, acute ; 

 glumes smooth, the upper one strongly 7-ncrved and reticulated, 2-3 times as 

 long as the lower one, barely longer than the tumid rugose perfect flower; sterile 

 flower neutral. (P. fuscorubens, Znm.) — South Florida. Oct. y. 



•1- ■»- Sterile Jloirer of one pahn, neutral. 



12. P. proliferum, Lam. Smooth; culms thick and succulent, ascending, 

 branched, geniculate; panicles lateral and terminal, diffuse; spikelets lanceolate- 

 ovate, acute, somewhat crowded on the straight branches ; upper glume 7-nerved, 

 3-4 times as long as the lower; perfect flower pointed. (P. geniculatum, J/u/i/.) 

 — Wet places near the coast, Florida, and northward. Sept. (X) — Culms 1*>- 

 30 long. 



13. P. capillare, L. Culms erect, simple or branched ; leaves and sheaths 

 hirsute ; panicles lateral and terminal, the very slender branches at length re- 

 flexed ; spikelets lanceolate-ovate, scattered on long and capillary pedicels ; 

 upper glume 5-ncrved, pointed, twice as long as the lower; ]icifeet flower obtuse. 

 (P. strigosum, Ell. 1) — Sandy fields, Florida, and northward. Sept. (T) — 

 Culms l°-2° high. 



14. P. divergens, Muhl. Culms slender, fragile, sparingly branched ; 

 leaves subu'atc, rough on the upper surface and margins ; the .smooth sheaths 

 longer than the joints ; panicle diffuse, bearded at the axils ; spikelets small, 

 Bpindle-shapcd, solitary at the summit of very long (2' -4') and rough pedun- 

 cles; lower glume minute; perfect flower lanceolate-oblong, acute, nearly as 

 long as the ujiper glume and neutral palea. (P. autumnale, Bosc.) — Dry sandy 

 soil. South Carolina, and northward. Aug. IJ. — Culms 1° high. Leaves 2' - 

 4' long. 



15. P. verrUCOSUm, Muhl. Smooth; culms very slender, branched; 

 leaves linear-lanceolate; panicles terminal, pyramidal, the slender scattered and 

 often simple branches spreading ; spikelets obovate, obtuse ; glumes obtuse, 

 roughened with fine warts, the upper one at length shorter than tiio perfect 

 flower, the lower minute. — Swamps, Florida, and northward. Sept. H. — 

 Culms 20-40 long. Spikelets ^" long. 



16. P. angUStifolium, Fll.' Culms weak, diffusely branched; leaves 

 linear; ]iaiiicle siiujile, the f-.w elongated and scattered branches bearing 2-4 



