CYPERACEJEK. (SEDGE FAMILY.) 539 
angled, 1°-2 high. Leaves short, linear. Bracts short, the upper one shorter 
than the spikes. 
38. C. dasycarpa, Muhl. Sterile spike single, short-peduncled ; fertile 
spikes 2—3, approximate, oblong; perigynia woolly, oblong, 3-angled, striate, 
scarcely beaked, with the orifice entire, twice the length of the ovate barely 
pointed pale scale; nut stalked. — Shady woods, Florida to South Carolina. — 
Culms 6/- 12! high, rough-angled. Leaves pubescent. 
39. C. tenax, Chapm. Culms (10/- 15 high) and rigid channelled leaves 
rough, but not pubescent ; spikes and ovate beaked and less pubescent perigynia 
larger; nut sessile; otherwise like the preceding, and possibly a stouter form of 
it. — Dry sand-ridges, Middle Florida. 
40. C. Pennsylvanica, Lam. Sterile spike single; fertile spikes mostly 
2, ovoid, approximate, 4 — 6-flowered, the lower one with a short or scale-like 
colored bract; perigynia nearly globose, pubescent, abruptly contracted into a 
short 2-cleft beak, longer than the oblong-ovate dark brown scale. (C. margi- 
nata, Muhl.) — Var. MunrEwBERGI, Torr. $ Gray. Fertile spikes mostly 3, 
6-10-flowered, distinct, the lowest leafy-bracted ; perigynia ovate, tapering 
into a short beak; scales light brown. (C. varia, Muhl.) — Dry woods, in the 
upper districts, Georgis, and northward. Si eben 4! — 8! high, er than 
the leaves. 
41. C. lucorum, wina. Sterile. ames Satin spies dea, ovoid, 
few-flowered, approximate, or the lowest remote and usually leafy-bracted ; peri- 
gynia ovoid, more or less pubescent, acute at the base, tapering into a slender 
rough 2-cleft beak, about the length of the ovate-oblong acute scale; leaves 
narrowly linear. — Var. NIGRO-MARGINATA. (C.nigro-marginata, Schw.) Peri- 
gynia 3-angled ; scales with brown or black sides; culms 1/- 2! high. — Var. 
FLomipaNA. (C. Floridana, Schw.) Perigynia compressed-3-angled: or lentic- 
ular (but the stigmas 3); scales white or margined with black; culms 2/— 12' 
long, prostrate or erect. — Var. Ewwowsir. (C. Emmonsii, Dew.)  Perigynia 
3-angled, acuminate at each end, nearly smooth; scales white; culms bristle- 
form, prostrate. — Dry sandy soil, Florida to North Carolina. 
++ ++ Fertile spikes linear or cylindrical, remote, all, or the lowest, on distinct and 
a commonly elongated peduncles. 
= Perigynia striated with numerous fine nerves : sterile R ge. 
+ Perigynia smooth, nearly terete, obtuse er barely pointa Ant bong ond leaf libe: 
spikes erect. 
42. C. grisea, Wahl. Sterile spike duties fertile spikes 3 — 4, lin- 
ear-oblong, rather loosely-flowered (4"— 8" long), the upper one nearly sessile ; 
perigynia oblong-ovoid, pointless, somewhat inflated, twice as long as the white 
ovate rough-awned scale.— Varies (C. flaccosperma, Dew.), with longer (1' or 
more) cylindrical spikes, and nearly awnless scales.— Low ground, Florida to 
)pi, and northward. — Culms smooth, 1° - 14° high. Leaves and bracts 
broadly linear: Upper spikes commonly approximate, the lenn re 
. Perigynia often indented near the apex. - 
