MANUAL OF THE GRASSES OF THE UNITED STATES 



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8. Triodia eragrostoides Vasey and Scribn. (Fig. 414.) Culms 

 slender, erect, densely tufted, 50 to 100 cm tall; blades flat, 1 to 4 mm 



wide, setaceous-tipped; panicle open, 10 

 to 30 cm long, the branches rather dis- 

 tant, slender, nexuous, spreading or 

 drooping, 5 to 15 cm long, nearly simple, 

 rather few-flowered; spikelets on slender 

 pedicels 1 to 10 mm long, oblong, mostly 

 6- to 10-flowered, scarcely 5 mm long; 

 glumes acuminate; lemmas about 2 mm 

 long, obtuse, ob- 

 scurely pubescent 

 along the midnerve 

 on the lower half, 

 the margins pubes- 

 cent, the midnerve 

 minutely excur- 

 rent. Ql (Tridens 

 eragrostoides 



Nash.) — Dry ground among shrubs, Flor- 

 ida Keys, Texas, and northern Mexico; 

 Cuba. 



9. Triodia flava (L.) Smyth. 

 Purpletop. (Fig. 415.) Culms erect, 

 solitary, tufted, 1 to 1.5 m tall; basal 

 sheaths compressed-keeled; blades elon- 

 gate, 3 to 10 mm wide, very smooth; pan- 

 icle open, 15 to 35 cm long, usually purple or finally nearly black, rare- 

 ly yellowish, the branches distant, spreading to drooping (sometimes 



Figure 411.— Distribution of 

 Triodia dTummondii. 



Figure 410.- 

 X 1; floret 



-Triodia drummondii. Plant, 

 X 5. (Bartlett 3224, Ala.) 





Figure 413.— Distribution of 



Triodia langloisii. 



Figure 412.— Triodia langloisii. Panicle, X 1; 

 floret, X 5. (Curtiss 5020, Fla.) 



Figure 414. — Triodia eragrostoides. Panicle, X 1; 

 two views of floret, X 5. (Swallen 1471, Tex.) 



shorter and stiffer), naked below, as much as 15 cm long with diver- 

 gent slender branchlets, the axils pubescent, the axis, branches, branch- 



