566 CLX. CYP RACE. CYPERus. 
§. 1. Style 2-cleft. Achenium compressed-lenticular. 
1. C. ruavescens. Yellow Sedge. 
St. leafy, triquetrous ; spikelets linear-lanceolate, 15—20-flowered, in fasei- 
cles of 3 or 4; invol. of 3, unequal leaves, longer than the spikes ; glwmes ovate, 
obtuse ; style 2-cleft ; ach. mucronate, somewhat rugose, dark brown.—2 Marshy 
grounds, U.8., not common. Stems and leaves about 8’ high, the former with 
yellowish-green spikes in a terminal umbel with unequal rays. <Aug., Sept. 
2. C. pianpRus. Torr. Diandrous Sedge, 
St. slender, reclining; wmbels sessile, 1—2-rayed; rays unequal; invol. 
3-leaved, the 2 outer leaves very long; spikelets oblong-lanceolate, flat, 14—16- 
flowered, collected into capitate fascicles; glumes acute; sta. 2; sty. 2-cleft; ach. 
compressed.—Marshes, N. Eng.! Mid. and W. States.. Stem 6—12’ long. 
Umbel somewhat paniculate. Glumes chestnut-colored. A delicately beauti- 
ful sedge. 
B.% castaneus, "Forr. (C. castaneus. Bw.) Rays very short; glwmes close, 
subcoriaceous, green on the back.—N. Eng.! Stems 4—8’ high. 
3. C. Nurratuu. Torr. Nuttall’s Sedge. m 
St. acutely triquetrous, leafy at base; luvs. narrow-linear, nearly as high 
as the stem; wmbel loose, subsessile, about 3-rayed ; rays short; énwvol. 4-leaved, 
the 2 outer leaves very long; spikelets very acute, linear-lanceolate, fasciculate, 
brownish; ach. oblong-obtuse.—2, Salt marshes, N. Eng. to La. Stems 6—12/ 
high, in dense tufts. Scales minutely 3-toothed. Stamens 2, 
+ 4. C. renetuus. Linn.? Torr. Slender Sedge. 
St..setaceous, very slender, 3—5’ high; dws. setaceous; spikelets solitary, 
lance-linear; invol. mostly of one erect, setaceous. leaf 1! in length; scales 
rather loose, 3-veined on the keel; sta.1; sty. 2-cleft; ach. oblong-obovate, much 
compressed, brown.—Monmouth Co., N. J., Dr. Cleaver, (Torr. Cyd., p., 258.) 
§ 2. Style 3-cleft. Achenia triangular. 
* Spikelets alternate, im pinnatiform, subdistichous spikes, 
5. €C. svricosus.. Bristle-spiked Galingale. 
St. triquetrous, leafy only at base; dvs. broad-linear, rough-margined, 
about as long as the stem; wmbel with elongated rays and oblong, loose spikes; 
involucels 0: or setaceous; spikelets numerous, linear-subulate, spreading hori- 
zontally, 8—10-flowered, 7—9" long; invol. of about 6 leaves, the 2 outer ones 
very long.—Wet grounds, U.S., frequent. Stem I—2f high, bulbous: at base. 
Umbel yellowish. Sept. 
8. Rays with setaceous involucels 1’ long; spikelets very numerous, subulate, 
3—4" long.—Ia. ! 
6. C. Micnauxiina. Schultes, (C. eruthrorhizos. Torr.) 
St. acutely triangular ; wmbel compound, with short rays; spikelets 6—9- 
flowered, the lower ones compound ; rachis very broad, easily separating at the 
joints ; ova. ovoid-triangular, enfolded by the interior, adnate seales-—@ Brack- 
ish swamps, generally near the sea, Middle and Southern States. Stem 12—15” 
high, ngaen at the base, longer than the leaves. Spikelets 9’ long, 7—9- 
flowered. 
7. C. REPENS. Ell. (C. phymatodes. MuAl.) 
Rt. creeping, bearing small, round tubers at the extremities ; s¢. 1—2f high, 
3-angled, striate ; dvs. subradical, as long as the stem; wmbel 4—6-rayed; rays 
often branched, bearing 12—20 linear, obtuse spikelets somewhat in 2 rows; 
sheaths obliquely truncate, involucels 0; spikelets 12—20-flowered, 6—8” long, 
the lowest generally fasciculate ; glumes yellowish.—2 Moist fields, N. Y. to 
Ta.! and S. States. Aug. 
8. C. speciésus. Vahl. Showy Sedge. 
St. acutely angled, about 3f high; luvs. deeply channeled, half as long 
as the stem; wmbels compound, about 8-rayed, rays alternate, 1—3/ long; 
ochre@ (sheaths) deeply 2-parted; partial wmbels with numerous, compound 
spikes, involucellate with setaceous bracts; spikelets umbellate. 5—8-flowered ; 
sta. 3.— Wet places, Columbus, Ohio, Sullivant. 
