CYPEEACE^. (sedge FAMILY.) 555 



23. R. fuSCOides, Boekl. Closely allied to the preceding, but every way 

 smaller ; culms 6' - 18' high, coespitose ; corymbs capitate, by pairs at the sum- 

 mit of the culm, and ofteu a distaut lateral one ; spikes ovate ; bristles 6, as 

 loug as the uut, rarely twice as long. (R. fascicularis, var. distans, Flora.) — 

 Low piue barrens, Florida to North Carolina. July - Sept. 



24. R. brachychaeta, Sauv. Culms caespitose, prostrate, 6' -12' long, 

 setaceous, like the leaves ; corymb solitary, terminal, capitate ; spikes few, 

 pale; nut minute, orbicular, thrice the length of the .3-6 bristles. (R. fas- 

 cicularis, var.. Flora.) — Wet pine barrens. West Florida. 



25. R, filifolia, Gray. Culms (1°- 2° high) filiform, erect ; leaves seta- 

 ceous; corymbs 2 - 4, distant, capitate ; spikes densely clustered, lanceolate ; 

 nut minute, obovate, lenticular, smooth and shining, twice as long as the com- 

 pressed triangular-ovate ciliate tubercle ; bristles 6, rigid, nearly as long as the 

 uut and tubercle. — Margins of pine barren ponds, Florida to North Carolina. 

 July - August. — Culm nearly terete. Spikes brown. Nut pale, with thick- 

 ened edges. 



26. R. pallida, M. A. Curtis. Culms rigid, acutely 3-angled, glaucous 

 green, rough above ; leaves erect, ciliate-serrulate ; corymb terminal, capitate, 

 compact; spikes very pale ferruginous, lanceolate, 1 -flowered ; nut obovate, 

 smooth, compressed, reddish brown, with a paler disk ; tubercle very short, 

 depressed, apicuLvte; bristles 3, one fifth the length of the nut ; stamens 3 ; 

 style 2-cleft. — Wilmington, North Carolina ( Curtis). June. — Culm 12' - 20' 

 high. Nut 1" long. 



27. R. gracilenta, Gray. * Culms and leaves filiform or setaceous ; cor- 

 ymbs 2-3, distant, capitate, brown ; spikes densely clustered, ovate-lanceo- 

 late ; nut oval, dull, as long as the slender subulate tuliercle ; bristles 6, twice 

 as long as the nut. — Wet pine barrens, Florida, and northward. July - Au- 

 gust. — Culms 1= - 2° high. 



* * * Nut smooth and even: bristles hispid downirnrd. 



28. R. alba, Vahl. Culms (l°-2° high) slender, 3-angled above; leaves 

 narrowly linear or setaceous ; corymbs mo.stly 2, capitate, white, turning 

 brownish, the lower one long-peduncled ; spikes ovate-lanceolate, l-Howered; 

 nut obovate, lenticular, twice as long as the compressed subulate tubercle ; 

 bristles 10-20, rigid, as long as the nut and tubercle, ciliate at the base. — 

 Wet springy places, Florida, and northward. August - Sept. 



29. R. glomerata, Vahl. Culms (2°-3° high) .3-angled; leaves nar- 

 rowly linear ; corymbs 4-12, often by pairs, capitate, dark brown; spikes 

 ovate-lanceolate ; nut obovate from a stalk-like base, lenticular ; tubercle sub- 

 ulate, as long as the nut, with its dilated base equalling it in width; bristles 

 6, stout, nearly as long as the nut and tubercle. — Var. paniculata. (R. 

 paniculata, Grai/.) Culms stout (3° -4° high); leaves flat (2" -3" wide); 

 corymbs compound, paniculate, with the very numerous spikes clustered at the 

 summit of the branches. — Bogs and springy places, Florida to North Caro- 

 lina, and westward. July- Sept. 



30. R. cephalantha, Gray. Culms (2° -3° high) nearly terete; leaves 

 narrowly linear ; corymbs 4-8, mostly by pairs, globose, compact; spikes nu- 



