532 
CYPEBACEJE. (SEDGE FAMILY.) 
serted, and several times longer than the flat and smooth obovate 
achenium. — Perennials, with triangular leafy culms, and large 
spikes clustered in simple or compound terminal and axillary 
cymes. (Name composed of Kepas, a horn , and axotoos, a rush.) 
1. C. comiculatsi, Nees. Cymes decompound, diffuse ; bris¬ 
tles awl-shaped , stout, unequal, shorter than the achenium. — Wet pla¬ 
ces, Ohio, Penn ? and southward. August. — Culm 3°-6° high. 
Leaves p wide. Fruit with the taper beak P long. 
2. C. macrostacliya, Gray. Cymes somewhat simple , small, 
the spikes closely clustered ; bristles capillary , twice the length of the 
achenium. — Borders of ponds, E. Massachusetts, Rhode Island, and 
New Jersey: rare. 
13. RHYNCHOSPORA, Vahl. Beak-rush. 
Spikes ovate, few - several-flowered ; the lower of the loosely 
imbricated scales empty, the uppermost usually with imperfect 
flowers. Perianth of 6 (or rarely more) bristles. Stamens mostly 
3. Style 2-cleft. Achenium lenticular or globular, crowned with 
the dilated and persistent base of the style (tubercle). — Perenni¬ 
als, with more or less triangular and leafy culms; the small 
spikes in terminal and axillary clusters, cymes, or heads. (Name 
composed of pvyxos, a snout , and ontopa , a seed , from the beaked 
achenium.) 
* Achenium wrinkled across , lenticular : bristles upwardly denticulate. 
1. R. eymdsa, Nutt. Culm triangular; leaves linear , fiat tf 
wide) ; cymes corymbose; spikes crowded and clustered ; achenium 
round-obovate, twice the length of the bristles, four times the length 
of the depressed-conical tubercle. — Low grounds, New Jersey and 
southward. July, August. 
2. R. Torreyana, Gray. Culm nearly terete , slender ; leaves 
bnstle-form ; cymes panicled, somewhat loose, the spikes mostly pedi - 
celled; achenium oblong-obovate, evenly wrinkled, longer than the 
bristles, thrice the length of the broad compressed-conical tubercle. — 
Swamps, Pine barrens of New Jersey. Aug. — Culm 2° - 3? high. 
* * Achenium smooth , lenticular. 
Bristles denticulate or barbed upwards. 
3. R. fusca, Roem. & Schultes. Leaves bristle-form , channel 
led; spikes ovate-oblong, few, clustered in 1-3 loose heads (dark 
chestnut-color) ; achenium obovate , half the length of the bristles , about 
the length of the triangular-sword-shaped flat and acute tubercle, 
which is wide at the base and rough-serrulate on the margins. — Low 
grounds, N. England to N. Jersey, rare. July. — Culm 6'-high* 
