518 
CYPERACEJE. (SEDGE FAMILY.) 
shores of lakes and rivers, not rare. Aug. — Plant sweet-scented, like 
Melilot, in drying. 
* * Stamens 3: culm triangular. 
•*- Without creeping rootstocks. 
6. C. MicliauxiailllS, Schultes. Culm stout (1° high); um¬ 
bel compound, many-rayed; rays short; spikes yery numerous and 
crowded, linear, 8 - 8-flowered, terete when mature; the joints of its 
axis very broad with winged scaly margins, which partly embrace the 
ovate achenium ; scales ovate, obtusish. (D (C. erythrorbizos, Ton. 
FI., #*e., not of Muhl .) — Salt marshes, common on the coast: rare 
along the Great Lakes. Aug. — Spikes yellowish-brown. 
7. C. Strigdsus, L. Culm mostly stout, tuberous at the base 
(l°-3° high); umbel simple or compound, many-rayed; rays elon¬ 
gated, their sheaths 2-bristled ; spikes linear-lanceolate, flat, 8-10- 
flowered, very numerous, reflexed with age, the joints of the axis 
slender, narrowly wing-margined ; scales oblong-lanceolate, strong¬ 
ly nerved, acutish ; achenium linear-oblong. — Low and cultivated 
grounds, very common. August. — Spikes crowded in ovate heads, 
straw-color. 
■+- Rootstocks creeping, commonly tuber-bearing at the extremity. 
8. C. repens, Ell. Culm rather stout (l°-2° high); umbel 
mostly simple, several-rayed ; spikes 10 - 20 on each ray, loosely spread¬ 
ing, the lower sometimes compound, linear, compressed, 12-30-flow- 
ered; scales oblong, blunt, straw-color; achenium oblong. (C. tube¬ 
rous, Pursh. C. phymatodes, Muhl.) — Moist sandy banks, Vermont 
to Michigan, common southward. Aug. — Multiplies rapidly by the 
little tubers on the creeping rootstocks, like the JYut-grass (C. Hydra) 
which is so troublesome at the South. 
9. C. dentatus, Torr. Culm slender (6'-12' high); umbel 
4-7 -rayed, compound ; spikes 3-6 on each partial ray, dustered, ovate- 
lanceolate or oblong, flat, 6-30-flowered; scales strongly keeled, with 
very acute slightly spreading tips, reddish-brown on the sides, green 
on the back; joints of the axis naked; achenium obovate, minute. — 
Sandy swamps, Massachusetts to Penn, and southward. Aug. 
10. C« Schweinitzif, Torr. Culm rough on the angles (1°~ 
2° high) ; umbd simple, 4 - 8-rayed; spikes few or many, crowded at 
the upper part of the mostly elongated rays, erect, linear-lanceolate, 
rather loosely 6-9-flowered, a bristly bract at the base of each; scales 
ovate, many-nerved, awl-pointed, yellowish-green, scarcely longer 
than the ovate nut; joints of the axis narrowly winged. — Hry sandy 
shores, Lake Ontario to Wisconsin. Aug. —Spikes -£' long. 
11. Orayii, Torr. Culm thread-form, wiry, tuberous at the 
base (S' -12' high) ; leaves nearly bristle-shaped , channelled ; utnbe 
simple, 4 - Grayed, rather erect; spikes 5-10 in a loose head, spread - 
