ur 5v136.- O. 
508 : CYPERACEJE. (SEDGE FAMILY.) 
-* * Spikelets compressed, somewhat 2-ranked, mostly few and scattered on the com- 
mon rachis: perennials, with creeping tuber-bearing rootstocks : flowers mostly 
abortive, 
12. C. repens, El. Umbel mostly simple, erect, 5 — 6-rayed, shorter than 
the 3—5-eaved involucre; spikelets linear, spreading, 12- 24-flowered, the 
lower ones often clustered; scales oblong, obtuse or short mucronate, com- 
pressed-keeled, thin-margined, spreading at the apex, yellowish brown ; nut ob- 
long, triquetrous, acute. — Sandy soil near the coast, Florida, and northward. 
July - Sept. — Culms 19-13? high, acute-angled, longer than the erect smooth 
leaves. Rays 2'-4'long. Spikelets 6" — 8" long. Whole plant yellowish. 
13. C. lutescens, Torr. & Hook. Umbel simple, large, 5 — 7-rayed, short- 
er than the 3- 5-leaved involucre; spikelets horizontal, flat, linear, 30 - 40-flow- 
ered, the lowest 2-3 in a cluster; scales light brown, oblong-lanceolate, acute, 
rounded on the back, slightly spreading at maturity ; nut obovate-oblong ; culms 
stout (29 - 3° high), acute-angled, shorter than the broadly linear leaves.— Key 
West. Nov.— Leaves 3"- 6! wide, very smooth. Rays 4' - 8' long. Spike- 
lets 1’ long, 13 wide, serrate, the lower ones with a bristly involucel. 
14. C. rotundus, L. Umbel simple or compound, 3 - 8-rayed, mostly 
longer than the 3-leaved involucre ; spikes composed of 3-9 scattered linear 
flat 20 - 30-flowered spikelets; scales oblong, obtuse, appressed, 7-nerved on the 
green keel, the membranaceous sides dark chestnut; nut obovate ; culms smooth, 
slender, longer than the broadly linear crowded spreading rough leaves. (C. 
Hydra, Michx.) — Sandy soil, along the coast, Florida to North Carolina” Aug. 
and Sept.— Culm 9/-18'high. Rays slender, 2'-4! long. Spikelets j'- ' 
long. . 
2. SPARSIFLORI. Umbel compound: spikelets compressed, many-flowered, scattered 
in loose spikes at the filiform summit of the rays: scales thin, 5-nerved, separate : 
joints of the rachis slightly margined : stamens 2. 
- 1. C. Iria, L. Umbel 6- 8-rayed, erect, shorter than the 3- 4-leaved in- 
volucre; spikelets erect-spreading, oblong-linear, 12 — 24-flowered ; scales spread- 
ing, nearly orbicular, obtuse or emarginate, short-mucronate, 5-nerved on the 
green keel, the thin whitish sides minutely pitted; nut oblong-obovate, abruptly 
pointed; style very short; culms (1° high) slender, acute-angled, longer than 
the smooth narrow leaves. — Santee Canal, South Carolina, Ravenel. Probably 
introduced from Eastern Asia. : ! 
| 3. PALMATI Umbel compound or decompound, diffase: spikelets 2-ranked, e 
~ pressed, many-flowered, 3—10 in a cluster at the summit of the general and par- 
— tial rays: scales closely imbricated, 3 — 7-nerved, decurrent on the raclus: sta 
* Culms terete, knotted, leafless : involucre very short : nut oblong. 
ieulatus, L. Umbel compound, many-rayed, spreading "T iy 
three bract-like pungent leaves; spikelets long (y 
eurved; involucre of 
