534 CYPERACER. (SEDGE FAMILY.) 
+ + Spikes 4~10, disposed in a simple spike or head, or (in No. 6) the lowest ones 
compound. 
6. C. sparganioides, Muhl. Spikes 6-10, ovoid, the upper ones crowd- 
ede lower scattered; and often compound ; perigynia flattened, ovate, acute at 
the base, narrowly margined, nerveless, spreading, with a short and rough 2-cleft 
beak, twice as long as the thin ovate scale. — Upper districts of Georgia, and 
northward. — Culms stout, 2° high. Leaves broadly linear, as long as the culm. 
Common spike 2/~4' long. Perigynia yellowish. 
7. C. Muhlenbergii, Schkr. Spikes 5~8, ovoid, approximate, or crowd- 
ed in an oblong head; perigynia round-ovate, plano-convex, strongly nerved, 
with a short and broad rough-edged 2-cleft beak, barely longer than the ovate 
short-pointed scale. — Dry sterile soil, South Carolina, and northward. — Culms 
12! - 18! high, rigid, rough above, twice as long as the narrow leaves. Head or 
spike 1' long. Bracts bristle-form, longer than the spikes. 
8. C. cephalophora, Muhl. Spikes 5— 6, small, crowded in a compact 
ovoid head ; perigynia broadly ovate, few-nerved, short and rough-beaked, as long 
as the ovate long-pointed scale.— Dry soil, Florida, and northward. — Culms 
9' - 15! high, naked above, rough on the angles, tough and wiry. Leaves nat- 
row. Head j'long. Bracts bristle-like. 
9. C. rosea, Schk. Spikes 4 - 6, 8- 10-flowered, the two upper ones ap- 
proximate, the others scattered , perigynia oblong, plano-convex, rough-beaked, 
spreading at maturity, twice as long as the broadly ovate obtuse or short-mucronate 
scale. (C. radiata, Dew., a form with more slender culms, and 3 - 4-flowered 
spikes.) — Upper districts, Georgia, and northward. — Culms 1? high, smooth, 
longer than the narrow leaves, Common spike 2/—3' long. Bract of the lowest 
spike commonly exceeding the culm. 
10. C. retroflexa, Muhl. Spikes 4-5, crowded, or the lower ones dis- 
tinct, ovoid, the lowest short-bracted ; perigynia ovate-lanceolate, smooth-beaked, 
2-cleft, at length widely spreading or reflexed, barely longer than the ovate long- 
pointed scale. — Open woods, Florida, and northward. — Culms slender, 1° high, 
rough-angled above. Leaves narrow, shorter than the culm. Common spike 
about 1' long. 
* 3X Spikes with the lower flowers sterile, the upper fertile. 
11. C. stellulata, Good. Spikes 3-5, obovoid, distinct, the uppermost 
club-shaped at the base; perigynia ovate, rounded at the base, tapering into à 
, 
short and rough 2-cleft beak, finely neryed, spreading and finally recurved 
rather longer than the ovate pointed scale. (C. scirpoides, Schk.) — P5 
iverswamps, Florida, and northward. — Culms 6'- 1% high, weak. Lew"? 
marrow and tender, Spikes small. e. 
. Var. sterilis. Sterile and fertile spikes on separate culms, oT cp - 
— sterile ^ or fertile on the same culm, otherwise like the preceding, , and gro 
ing in similar y 5. (C. steri lis, Willd.) — and more 
SETA 
Culms taller (2° high) and stouter ; spikes larger 90° 
dovete, twice as long as tho broadly. ovate bere 
