CYPERACEJE. (SEDGE FAMILY.) 528 
2. I. ciliatifolia, Torr. Culms tufted, filiform, angled (6/-12' high); 
leaves bristle-form, hispid on the edges, the sheaths bearded at the throat; um- 
bel compound; spikes several (1"— 2" long), 6 - 12-flowered, linear-oblong ; 
scales oval, strongly keeled, brown on the sides; nut obovate, very obtuse, 
nearly equal-sided, obscurely wrinkled. (Scirpus ciliatifolius, El.) — Dry sandy 
places, Florida to North Carolina. Aug. and Sept. 
3. I. coarctata, Torr. Culms (1° high) terete, filiform ; leaves bristle- 
form, smooth, with the sheaths bearded; umbel compound, contracted; spikes 
(3" long) linear-oblong, 10 - 15-flowered ; scales ovate, acutish, imbricated in 4 
rows ; nut flat on the inner face, obtuse-angled in front, obscurely dotted.  (Scir-' 
pus coarctatus, EU.) — Dry sandy soil, Georgia and South Carolina, near the 
coast. Sept. and Oct. — Rays of the umbel }! long. 
* * Spikes clustered in a terminal head. : 
4. I. stenophylla, Torr. Culms (2'-4' high) densely tufted, 3-angled, 
and, with the bristle-form leaves and involucre, bristly-ciliate ; involucre much 
longer than the head, 3-4-leaved, dilated and ciliate at the base; spikes 4 — 6, 
oblong-linear, 8— 10-flowered ; scales lance-ovate, slender-pointed, hispid on the 
3-nerved keel; nut (bluish) obovate, obtuse, wrinkled. (Scirpus stenophyllus, 
Ell.) — Dry sandy soil, Florida to North Carolina. Aug. and Sept. 
5. I. Warei, Torr. Culms filiform (1°-1}° high), smooth, 3-angled, 
much longer than the bristle-form hispid leaves; sheaths bearded at the throat 
with long silky hairs; leaves of the involucre rigid, twice as long as the head, 
orbicular and cut-fringed at the base; spikes 8-10 in a head, ovate, many-flow- 
ered; scales ovate, mucronate, many-nerved; nut obovate, obtusely angled, 
obscurely wrinkled. — Dry sands near the coast, West Florida. Sept. — Heads 
} in diameter. 
13. ABILGAARDIA, Vahl. 
Spikes many-flowered. Scales imbricated in 2 or (by the twisting of the 
rachis) 3 rows, keeled, decurrent on the rachis, deciduous.  Perianth none. 
Stamens 1-3. Style 3-cleft, tumid at the base, deciduous. Nut 3-angled.— 
Culms jointless, leafy at the base. Spikes solitary, clustered or umbelled. 
1. A. monostachya, Vahl. Culms filiform, tufted (6/ — 10' high) ; leaves 
shorter than the culm, filiform, obtuse, concave ; spikes solitary (rarely by pairs), 
ovate, acute, compressed, 8 - 12-flowered, much longer than the bract-like mu- 
cronate 1-leaved involucre ; scales broadly ovate, acute or mucronate, compressed- _ 
keeled, with broad and white margins; stamens 3; nut somewhat pear-shaped, 
3-angled, warty, yellowish-white. — South Florida, Ee. 
14. RHYNCHOSPORA, Vahl. Bzrax-Rvsn. 
Spikes 1l-several-flowered. Scales imbricated in few rows, the lemosin : 
the upper | ! jua ly iio pertes flowers. Perianth of 3-6 ni eme 
