172 CYPERACEAE 
~ S. TE o Perennial and similar to the next preceding species 
habit, someti 2 tall: leaves pale-green: inflorescence laxer, = 
branches elongate and se “ar rooping: spikelets ovoid or ae ovoid, 3.5 em 
ong, some of the lateral ones eue neled: scales 1.5—2 mm. long, s 
pointed: aan -bristles pale, long as in S. cyperinus: viue PENA P 
obovoid, less than 1 , pale, re ice -pointed.—Swamps and low 
gro ounds, various provinces, Fla. to Tex., Ark., Ind., and Conn. 
793, S. cubensis Poepp. & Kunth. Perennial, resembling species p? e yperus, 
sometimes tufted, the scapes up to 1 m. ta il, s sharply 3-angled: ves and 
bracts of the involucre quite similar, smooth above: spikelets oe ee 
in mm. long, each with a 
S l n 
narrowly obovoid or narrowly ovoid, 2-3 mm. long, garb a 
and river- ices “Coastal Plain, Fla. to La. N at. of the trop.—(W. I., Mez., 
C. A., S. A., O. W.) 
| 13. FUIRENA Rottb. Perennial or rarely annual caulescent herbs. 
Leaves sometimes represented only by sheaths. Spikelets many-flowered, terete, 
often bur-like, clustered, or rarely solitary. Scales spirally imbricate, awned. 
Flowers perfect. Perianth of 3 usually stalked scales alternating with down- 
wardly barbed bristles. Stamens 3. Ovary stipitate. Style not swollen at 
the base, deciduous. Stigmas 3. Achene 3- Joe i. or nearly sessile, 
smooth.—About 30 species, most abundant in the warmer regions.—Spr—fall. 
—UMBRELLA-GRASSES. 
Leaves reduced to sheaths without blades, except sometimes near ee of the stem. 
SCIRPOIDEAE. 
Leaves with well-developed sheaths and blades. II. SQUARBOSAE. 
SCIRPOIDEAE 
Leaf-sheaths all bladeless : blades of the perianth-seales ovate. 1. F. scirpoidea. 
Leaf-sheaths on the upper part of rd stem blade-bearing: blades 
of the perianth-scales suborbicul 
to 
. F. longa. 
II. Sou 
PE bristles exceeding the achene and seed -seales : plants 
3. F. squarrosa. 
Perianth bristles o EL to the middle of the achene or shorter: 
Pola qe. very short, not exceeding the stipe of the 
l RT or slightly longer : perianth- Seales wi ith suborbicular 
r somewhat reniform blades 4. F. breviseta. 
Perianth- bristles reaching to about the middle of the achene: 
perianth-seales with deltoid-ovate blades. 5. F. hispida. 
F. scirpoidea Michx. Perennial, the 
S 
stem d gregarious, 2-6 dm. tall 
ves mere sheaths with oblique margin 
braets of the involuere 2— ] ke- 
lets solitary or clustered gu mm piss 
scales pubescent, the body 3 mm. long, 
ith a short subulate tip: ne of Bu 
perianth-scales ovate, acute, m. 
long, rounded base e Sere E 
as long as the sepal-stalks or longer: achene- 
body oval-rhombie or s t obovoid 
fully 1 mm. long.—Lake shores, swamps, 
and low pcne Coastal Plain, Fla. to 
—La. and Ga. 
