51G CYPERACE.Ii. (sKDCiE lAJULY.) 



"■ E. simplex, Ton-. Culms unequally 3-sidc(l, acutL'-aiijjlcd ; spikes 

 short, ovate, acute ; scales ovatc-oblong, wliitish, witli hrowiiisli sides ; nut 

 obovate, flat on tlic inner face, twice as long as the cunical-bcakcd compressed 

 acute tubercle; bristles rigid. (E. tortili^, Sc/mlt. Seirpus simplex, A7/.) — 

 Miry places along streams, Florida to North Carolina. May - Sept. H. — 

 Culms 1°-1^° liigh, very slender, twisted when dry. S])ikes 2" -3" long, 

 angular, few-flowered. 



8. E. prolifera, Torr. (Cyp. p. 31. 'J, not of p. 442). Culms filiform, dif- 

 fuse or prostrate, compressed ; spikes ovate-lanceolate, acute, proliferous or 

 rooting; scales whitish, thin, oval, obtuse; nut obovate, compresscd-3-angled ; 

 tubercle half as long as the nut, conical, 3angled, free at the base ; bristles 

 stout. (E. vivipara, Zi«i.) — Jlarshy banks of ])onds and streams, Florida to 

 North Carolina. May -Sept. y. — Culms 10' -20' long, tough and wiry. 

 Spikes 2" - 4" long, very rarely fruiting. 



•t- -I- Brixtlcs 4 - C, longer than the smooth nut. 



9. E. intermedia, Torr. Culms bristle-form, diffuse, furrowed; spikes 

 oblong-ovate, acute, 8 - 10-flowcrcd ; scales ovate-lanceolate, rather acute, thin, 

 brown on the sides ; nut (yellowish) obovate, narrowed at the base, flat on the 

 inner face, beaked with the subulate tubercle ; bristles 6, stout, as long as the 

 nut and tubercle. — Wet places and in sliallow streams, Georgia, and northward. 



— Culms \° long. Spikes 2" -3" long. Nut minutely striate. 



10. E. albida, Torr. Culms terete, spongy ; spikes pale, oval or oblong, 

 obtuse, many-flowered ; scales rigid, oval, obtuse, white or brownish ; nut broadly 

 obovate, whitish, flat on the inner face, smooth and shining ; tubercle minute, 

 free at the base ; bristles 6, reddish, longer than the nut. — Wet sandy places 

 along the coast, Florida to South Carolina, and westward. May - Sept. if- — 

 Rhizoma filiform, creeping. Culms 2'- 6' high. Spikes 2" -3" long. 



11. E. rostellata, Torr. Culms compressed, furrowed, wiry; sjiikos 

 ovate-lanceolate, acute, 12 -20-flowered ; scales rigid, oval, obtuse, light brown ; 

 nut obovate, flat on the inner face, tapering into the conical-beaked tubercle ; 

 bristles 4-6, stout, twice as long as the nut. — South Carolina, and northward. 



— Culms 1°-U° high. Spikes 3" -4" long. 



■*-■*-+- Bristles 2 - G, 7iot exceeding the nut, qfleti wantiiuj. 



12. E. melanocarpa, Torr. Culms compressed, furrowed, tough and 

 wiry; spikes ovate or ovate oblong, obtuse, many-flowered; scales thin, ovate, 

 obtuse, white on the broad margins; stylo 2-3-cleft; nut black, olKoiiieai. .3- 

 anglcd or biconvex, truncate at the apex, and capped with the triangular 

 minutely pointed wiiite tubercle ; bristles 3, as long as the nut, sometimes want- 

 ing. — rine-l>arren swamps, Florida, and northward. June - Sept U — Culms 

 I''- U° high. S|)ike8 4" -6" long, 2" thick, occasionally proliferous. 



13. E. arenicola, Torr. Rhizoma long and creeping; culms slender, 

 sli'jhtly compressed, striate, tough and wiry ; sj)ikes ovate, or at length oblong 

 or cylindrical, obtuse, many-flowered ; scales thin, oblong, obtuse, brown at tlio 

 summit, white on the margins ; nut (yellowish) obovate, com pressed -3-anglcd, 



