MANUAL OF THE GRASSES OF THE UNITED STATES 



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lets, and pedicels viscid; spikelets oblong, mostly 6- to 8-flowered, 5 to 

 8 mm long; glumes subacute, mucronate; lemmas 4 mm long, obtuse, 

 pubescent on the callus and lower 

 half of keel and margins, the 3 

 nerves excurrent; palea a little 

 shorter than the lemma, some- 

 what bowed out below. 01 (Tri- 

 cuspid seslerioides Torr. ; Tridens 

 seslerioides Nash; Tridens flavus 

 Hitchc.) — Old fields and open 

 woods, New Hampshire to Ne- 



Figure 416.— Distribution of 



Triodia flava. 



braska, south to Florida and 

 Texas (fig. 416). The type speci- 

 men is the rare form with yellow- 

 ish panicle. In some Florida 

 specimens the excurrent nerves of 

 the lemma are as much as 1 mm 

 long. 



10. Triodia texana S.Wats. (Fig 



i§ 



Figure 418. — Triodia 

 stricta. Panicle, X 1; 

 two views of floret, X 

 5. (Newlon, Kans.) 



417.) Culms Figure 417.— Triodia texana. Panicle, X 1; floret, X 



erect, densely 5 ' (Wooton ' Tex) 



tufted, 20 to 40 cm tall; sheaths pubescent at throat 

 and collar; blades flat or subin volute, 1 to 4 mm wide, 

 tapering to a slender point; panicle open, 5 to 15 cm 

 long, nodding, the branches rather distant, flexuous, 

 drooping, few-flowered; spikelets oblong, 6- to 10- 

 flowered, 6 to 10 mm long, rather turgid, pink or 

 purplish, more or less nodding on short pedicels; 

 glumes broad, acute to obtuse; lemmas 4 to 5 mm 

 long, obtuse, minutely lobed, 

 the margins densely pilose 

 near the base, the keel gla- 

 brous or sparsely pilose be- 

 low, the 3 nerves short-ex- 

 current; palea about as long 

 as the lemma, strongly 

 bowed out at base. 01 (Tri- 

 dens texana Nash.) — Plains 

 and dry slopes, central and southern Texas, and 

 northern Mexico. 



11. Triodia stricta (Nutt.) Benth. 

 Culms rather stout, erect, 1 to 1.5 m 



Figure 419. — Distribution of 

 Triodia stricta. 



(Fig. 418.) 

 tall; blades 

 elongate, flat or loosely involute, 3 to 8 mm wide; panicle dense, 

 spikelike, more or less interrupted below, narrowed above, 10 to 



