574 GRAMINEJE. (GRASS FAMILY.) 



glumes long-pointed, the upper 7-nerved, one third longer than the obtuse pcr- 

 feet flower; sterile flower 3-androus. — Sandy soil, Florida, and northward. 

 Ang. and Sept. 1J. — 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-nerved, one third longer than the oblong obtuse perfect flower, and equalling 

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

 ward. Sept. 1J. — Tlant salt and bitter to the taste. 



11. P. fasciculatum, 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, obovatc, 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, Lam.) — South Florida. Oct. y. 



-t- +- Sterile flower of one palea, 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, Muld.) 

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

 3° long. 



"v- 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; 

 tipper glume 5-nerved, pointed, twice as long as the lower; perfect 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 subulate, rough on the upper surface and margins ; the smooth sheaths 

 longer than the joints ; panicle diffuse, 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-oblong, acute, nearly as 

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

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

 4' long. 



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

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

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

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



flower, the lower minute. — Swamps, Florida, and northward. Sept. 1J. — 



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



16. P. angustifolium, Ell.? Culms weak, diffusely branched; leaves 

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



