CYPERACEAE 169 
1. S. nanus Spreng. Annual, tufted: scapes flattened and grooved, less than 
1 dm. tall, ien basal sheath bladeless: spikelet ovoid or ovoid-oblong, 2-3 mm 
long, nye red: scales 1.5-2 long, 
pale-green : idi bristles [pP ian the 
achene, barbed: achene oblong or eden 
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Mez., O. W.) 
(2. S. diae L. Perennial, eared 
fted: scapes filiform, pid terete, 1 -5 dm. 
tall Met sheathed at e base, the up- 
e bla 
n 
lowish-brown: perianth-bristles longer 
Mis d Su achene ellipsoid to nen] about 1.5 mm. long, short-beaked. 
EER-HAIR. DEERHAIR-BULRUSH.)—Bogs and moist rocks, Blue Ridge and 
more northern provinees, N. C. and Tenn. to Tl. Colo., Alas., C Can., and Lab. 
—(Greenl., O. W.) 
73. S. subterminalis Torr. Perennial, mostly aquatic: scapes up to 1 m. ta Hy 2 
nearly pnm the basal sheaths Ms longae submersed (except in terrestrial 
forms) blades spikelet oblo ong, 1 ovoid, or ee 0-13 mm. 
long, few-flow HAN A seales 4—5 "do sA green or perianth- 
bise as long as the achene or pou downwardly barbed: T obovoid, 
m. long, abruptly short-beaked —(SWAYING- RUSH.)—Ponds and streams, 
As atid, various provinees, Miss. to B. C., Ont., and Newf. 
/4. S. Clintonii A. Gra ay. Perennial, tufted: scapes 3-angled, very slender, 
sheathed at the d some of the sheaths pira: icy often linear blades: 
spikelet ovoid, 3—4 mm. long, few-flowered: E 9.0 mm. long, pale-br s 
perianth-bristles as long ES the achene or uo “upwardly barbed: ach 
oblong or obovoid, 1.5-2 . long, obtuse. Se ks, fields, and thickets, Blue 
Ridge and more northern rere: N. C. to Mich. and N. Y. 
/ 5. S. carinatus (H. & A.) A. Gray. Annual, tufted: scapes 3-angled, TTA 
neled, 0. dm. tall, the basal sheath with a slender blade: spikelet ovoid, 
abou t 4m m. long, 6-8 E scales 1.5-2 mm. long, pale, except the midrib 
and keel, seariou piden 2 wide: perianth-bristles wanting: achene 
oval or a obovoid, ps 1.5 mm. long, brown, minutely pointed.—Low 
ee fields, ec ro adsides, pos eg Plain and adj. provinces, Ala. to Tex., 
Okla., and Tenn.; also in 
76. S. Halli A. Gray. Annual, tufted: scapes up to 4 dm. tall, nearly terete 
or obtusely 3-angled, the upper basal sheath usually with a slen der - lade: 
1 
ied dip d becoming oblong- soie 6-15 mm. long, many-flowered 
cales 2.5—3 . long, greenish, abruptly poin p pie e Sud 
ze ene ed -globose, sometimes depressed, fully 1 mm. long, black, trans- 
verse-wrinkled.—Wet soil, various provinces, rie to Tex, Colo., and Til. ; 
also in Mass fes.) 
S. debilis Pursh. Annual, tufted: scapes 1-6 dm. tall, nearly terete or 
obtusely triangular, yellowish- “green, the sheaths bladeless or the upper one 
with a short blade: spikelets ovoid or oblong-ovoid, 5-10 mm. long, m 
