r>7t GRAMINr„K. (grass FAMII.Y.) 



glumes loTip;-poinlo(l, tlio uppor "-norvod, one third longer than tiio ohtiisn per 

 feet flower; sterile flower .'i-aiulrous. — tSaiuly soil, Florida, and northward. 

 Auj;. and Sept. y. — Culms .several in a cluster. Leaves smooth, flat (j^rcen), 

 1° or more long. Glumes purplish. 



10. P. axnarum, Ell. (ilaucous; culms stout; hranches of the slender 

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

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

 7-nerved, one third longer than the oljlong ohtusc perfect flower, and equalling 

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

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



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

 ing; leaves membranaceous, linear-lanceolate; panicle contracted, 3' -4' long, 

 with the mostly simple branches erect ; spikelets deep green, obovate, acute ; 

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

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

 flower neutral. (P. fuscorubens, Zam.) — South Florida. Oct. Ij. 



•t- •»- Sterile flower of one pakn , veiitrnl. 



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

 branched, geniculate ; panicles lateral and terminal, diff'use ; spikelets lanceolate- 

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

 3-4 times as long as the lower; perfect flower pointed. (P. genieulatum, Muld.) 

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

 3° 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; perfect flower obtuse. 

 (P. strigosiim, J?//. ?) — Sandy fields, Florida, and northward. Sept. Q\ — 

 Culms l°-2° high. 



14. P. divergens, ^fnhl. Culms .slender, fragile, sparinglj' branched ; 

 leaves sulmlatc, rough on the upper surface and margins ; the smooth sheaths 

 longer than the joints ; panicle diff'use, bearded at the axils ; spikelets small, 

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

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

 long as the upper glume and neutral palea. (P. autumnalc. Base.) — Dry sandy 

 soil. South Carolina, and northward. Aug. T\. — Culms 1° high. Leaves 2'- 

 4' long. 



1 5. P. veiTUCOSUm, 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 the perfect 

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

 Culms 2°- 4° long. Spikelets ^-" long. 



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

 linear; panicle simple, the few elongated and scattered branches bearing 2-4 



