510 CYPERACEH. (SEDGE FAMILY.) 
lanceolate, incurved, spreading at the apex; nut minute, linear-lanceolate, slen- 
der-pointed ; culms slender (29 - 3? high), obtuse-angled or nearly terete ; leaves 
narrow, rigid, rough on the margins near the summit. — Low pine barrens and 
margins of ponds, Florida to North Carolina. Sept. 1} — Culms tumid at the 
base. Leaves of the involucre horizontal. Heads light brown. 
22, C. Drummondii, Torr. Umbel compound, of 4—6 primary rays, 
and as many smaller ones, shorter than the 4-leaved involucre ; spikelets (10-20 
in a cluster) oblong or oblong-linear, 40— 50-flowered ; scales yellowish, ovate, 
straight, free at the apex; nut oblong, pointed, abruptly contracted at the base, 
minutely wrinkled; culms (6/—15' high) obtuse-angled, very rough, longer than 
the narrow leaves. — Sandy swamps, Middle Florida, and westward. Septem- 
ber. @ 
* *. Umbel simple or sessile: spikelets lanceolate or linear, compressed: scales 8-10- 
nerved, tapering into a long spreading or recurved point: nut obovate-oblong: low 
tufted annuals. 
23. C. inflexus, Muhl. Umbel of 1 - 2 short rays or sessile, much shorter 
than the 2~3-leaved involucre; spikelets very numerous in the clusters (green), 
oblong-linear (2" long), 10-20-flowered ; scales thin, oblong, 8-nerved, gradu- 
ally pointed; culms weak, acute-angled (2/~6! high), as long as the smooth 
narrowly linear leaves. — Low sandy places, Apalachicola, Florida, (apparently 
introduced,) to North Carolina, and northward. July -Sept. — Sheaths of the 
leaves green. 
24. C. confertus, Swartz. Umbel of 1-2 short rays or sessile, shorter 
than the 2-leaved involucre; spikelets 8-20 in a cluster, lanceolate, 12 *20-flow- 
ered, reddish brown (3" long) ; scales rigid, oblong, 10-nerved, abruptly pointed ; 
culms acute-angled (1'!-4! high), as long as the linear smooth leaves; shea 
dark brown.— South Florida, November. Spikelets less crowded than in the 
preceding. 
5. Carrratr. Unmbel simple or sessile: spikelets inserted on all sides of dec 
rachis, forming clusters or heads: joints of the rachis mostly winged: , 
5 - 1-nerved : stamens 3. 
* Spikelets few in loose clusters. 
25. C. filiformis, Swartz. Clusters sessile; spikelets 6-12, erect, terete, 
subulate, 6 — 12-flowered ; scales scattered, appressed, oblong, mucronate, fi 
- nerved ; rachis very slender, flexuous ; nut oblong, acute; culms 
. aeute-angled, longer than the bristle-like leaves; involucre 2-leaved, 
one elongated and erect. — Key West. November. \} 
tumid at the base. Spikelets 4" - 6" long. 
tufted, filiform, 
the lower 
— Culms 4’~10" high, 
nut broadly obovate, aen? 
-an 1 than the pale July- 
s, Florida to North Carolina, and westward. a - 
