562 
CYPERACEjE. (sedge family.) 
nia very hairy , shaped as the last, longer than the ovate taper-pointed 
light-brown scale; culm sharply triangular, smooth except near the 
top, sheaths and under surface of the leaves smooth . (C. trichocdrpa, 
Muhl.) — Marshes and lakes, New England to Michigan, northward. 
■***•” Staminate spike solitary, with a filiform bract, occasionally bear- 
ing a few fertile flowers towards the apex or base ; fertile spikes 3- 
5, cylindrical, densely flowered, on long exserted at length droop¬ 
ing stalks: perigynia widely spreading, reflexed at maturity. 
106. C. coraosa, Boott. Fertile spikes large (1|'-2|' long 
and §' wide), the lowest sometimes very remote ; perigynia taper- 
i- n S from a stalked ovoid-triangular base into a long deeply 2-forked 
beak, the sharp elongated teeth widely spreading or somewhat recurv¬ 
ed ; scales lanceolate with a long bristle-shaped awn shorter than the 
mature fruit; culm rough and triquetrous. (C. furckta, Ell. , not of 
Lapeyrouse. C. Pseudo-Cyperus, Schw. Torr ., Dew., fyc., in part, 
not of L.) — Borders of lakes and streams, N. New England to Michi¬ 
gan.— A robust species 2P-3P high, formerly confounded with the 
next, which it greatly resembles, but differs from it especially in the 
larger fertile spikes, longer beak of the fruit, and the longer, smooth 
and widely-spreading teeth, giving to the spikes a comose or bristly 
appearance. 
107. c. Pseudo-Cyperus, L. Fertile spikes (1£'« 2£' long, 
and about §' wide) sometimes slightly compound at the base ; perigy¬ 
nia shaped as the last, but with a shorter beak , and shorter less spread¬ 
ing teeth ; scale like the last, about the length of the mature fruit.—■ 
Lakes and marshes, W. New York and northward.—Somewhat 
smaller than the last in all its parts. 
§ 12. Perigynia much inflated, conspicuously many-nerved, smooth, with 
a long tapering 2-toothed beak: bracts leaf-like, much exceeding the 
culm : scales tawny or white ; staminate spike stalked, always soli- 
tary -LupulIhje. 
* Bracts with very short or obsolete sheaths. 
108. C. hystricina, Willd. Sterile spike often bearing a few 
fertile flowers at the base or apex; fertile spikes 2-4, oblong-cylindri¬ 
cal, densely flowered, the uppermost on a very short stalk, the others 
on long stalks and at length nodding, the lowest often very remote; 
perigynia spreading, tapering from an ovoid base into a long slender 
beak with sharp smooth teeth , longer than the awned scale. — Varies, 
with shorter ovoid spikes, the lowest very remote on a filiform stalk, 
4 , -6 / long, with rather smaller perigynia not much longer than the 
awn. (C. Cooleyi, Dew.) — Wet meadows, New England to Michi- 
S an - Plant pale or yellowish green, with fertile spikes l 7 to l£ ; 
long: closely approaching the last, from which it is distinguished by 
the more inflated, less diverging fruit, the beak longer and the teeth 
shorter; and from the next, which it also resembles, by the smaller 
