554 CYPERACEiE. (SEDGE FAMILY.) 



16. R, miliacea, Gray. Culms tall (3°-4° high), 3-angled; leaves flat 

 (3" -4" wide) ; lorvmlis 6 -8, distant, compound ; tlie liranclics and slender 

 pedicels spreading ii(jrizontall\ ; sjiikes ovate; scales caducous; nuts 4-8 on 

 the spike, round-oliovate, biconvex; tubercle compressed, conical; bristles 6, 

 slender, as long ius tiie imt and tubercle. — Hogs and deep mirv places, Flor- 

 ida to N(jrth Carolina. June -July. — Tlie nuts of tiiis antl the jirecediug 

 species remain on tlie spike after the scales have fallen away. 



17. R. punctata, Kll. Culms (I°-2° high) slender, 3-angled; leaves 

 siiort, linear-lanceolate; corymijs 3-4, cluster-like, tlie lateral ones simple, 

 distant, and long-pcduncled ; spikes ovate ; nut obovate, compressed, with 

 transverse pitted furrows, rather shorter than the 6 slightly hispid l)ristles; 

 tubercle conical, compressed, sliorter than tlie nut. — Kear SavanuaJj and 

 St. Mary's, (ieorgia {Elliott). May -June. 



18. R, Grayii, Kunth. Culm solitary, 3-angled (2°-.'3° higli) ; leaves lin- 

 ear, rigid, siiiuing ; corymbs 3-4, distant, capitate ; sjjikes few, large, ovate; 

 nut rouud-obovate, tumid, slightly pitted, dull ; tubercle short-conical, dilated 

 at the base ; bristles 6, as long as the nut and tui>ercle ; stamens 3-6. ( li. dis- 

 taus. Ell.) — Ury pine barrens, Florida to North Caroliua. June -July. 



* * JSut smooth and even : bristles hisfid upward. 



19. R. megalocarpa, Gray. Culms stout (2°-3° high), 3-angled; 

 leaves rigid, linear, sliining ; corymbs 4-6, distant, spreading or somewhat 

 contracted; spikes (3" long) ovate, single; nut large (2" long), orbicular- 

 obovate, biconvex, liglit brown, turning blackish ; tuliercle short-conical from 

 a spreading base; bristles 6-10, commonly sliorter than the nut; stamens 12. 

 (K. dodecandra, Baldir.) — Dry sands along the coast of Florida, and Wil- 

 mington, North Carolina. May -August. 



20. R. Baldwinii, Gray. Culms (2° -3° high) sharply 3-angled, rough; 

 leaves short, glaucous, smooth, very acute ; corymbs 1 -3, contracted or nearly 

 capitate; spikes ovate, dark chestnut; nut ovate, lenticular, twice as long as 

 the flat conical tubercle ; bristles 12-14, longer than the nut ; stamens 6. — 

 Wet pine barrens, Georgia and Florida. June -July. 



21. R. ciliata, Vahl. Culms blunt-angled (\°-2° high); leaves short, 

 glaucous, linear lanceolate, obtuse, fringed on the mai-gins ; corymbs mostly 

 solitary, capitate ; spikes light brown, ovate; nut oval, lenticular, minutely 

 roughened ; tubercle flat, conical ; bristles 6, \ the length of the nut ; stamens 

 3. — Wet pine barrens, Florida to North Carolina. June -August. — Leaves 

 2' -4' long. Lateral corymb (when present) remote. 



22. R. fascicularis, Nutt. Culms obscurely 3-anglcd, commonly slen- 

 der (2° -3^ high) ; leaves pale, narrowly linear ; corymbs 2-3. distant, capitate, 

 or sometimes compound ; bracts conspicuous ; spikes light brown, oblong ovate, 

 densely clustered ; scales mucronate-awned ; nut oval or orbicular, lenticular, 

 dark brown, usually pale in the middle and on the prominent edges ; tubercle 

 white, broadly or narrowly conical, obtuse, com))ressed, one third to one half 

 the length of the nut ; bristles 4-6, varying from one half to nearlv twice the 

 length of the nut. (R. distans, Nutt., the form with longer bristles.) — Low 

 pine barrens, Florida to North Carolina. June -July. 



