CYPERACEÆ®. (SEDGE FAMILY.) 521 
acute-angled nut. — Muddy banks of the Chipola River, and of Flat Creek, near 
Aspalaga, Florida, to South Carolina; not common. Aug.— Culm 29-49 
high, often proliferous at the joints. Umbel 6'-12' long. Spikes 2"-— 3" long. 
* * Bristles 6, capillary, smooth, crisped and entangled.  ('Trichophorum.) 
10. S. Eriophorum, Michx. Culm nearly terete, with the joints remote ; 
leaves linear, elongated, keeled; umbel terminal, decompound, spreading or 
recurved, shorter than the 3-5-leaved involucre; spikes single or clustered, 
ovate ; scales thin, lanceolate, obtuse; bristles many times longer than the 
oblong compressed-3-angled beak-pointed nut, at length exserted, and covering 
the spike with woolly down. (Trichophorum cyperinum, Pers.) — Swamps and 
low grounds, Florida, and northward. July - Sept. — Culm 29 — 4° high. 
11. S. lineatus, Michx. Culm 3-angled; leaves flat, linear-lanceolate ; 
umbels lateral and terminal, longer than the 1 —3-leaved involucre ; spikes all 
single, cylindrical ; scales rigid, keeled, mucronate ; bristles barely exserted ; nut 
as in the preceding. Swamps, Georgia, and northward. June - Aug. mus 
29-39 high. Spikelets 3” — 4" long. 
9. ERIOPHORUM, L. Corrox-Gnass. 
. Spikes many-flowered. Scales imbricated in many rows. Perianth composed 
of numerous (rarely 6) smooth and flat hairs, much longer than the scale, and 
forming a woolly or silky tuft. Stamens commonly 3. Style 3-cleft, deciduous. 
Nut 3-angled or lenticular. — Perennials, with leafy culms, in our species, and 
clustered or umbelled spikes. 
1. E. Virginicum, L. Culm nearly terete, rigid; leaves narrowly linear, 
‘elongated ; spikes densely clustered, nearly sessile, erect ; involucre 2 - 3-leaved ; 
wool reddish, thrice the length of the brownish scales ; nut compreased-$-angled, 
acute. — Bogs and swamps, Florida, and northward. June ~ Aug. — Culm 2°- 
39 high. Leaves 10' — 18' long. 
2. E. polystachyon, L. Culm terete; leaves broadly linear, 3-angled 
at the summit ; spikes umbelled, distinct, on slender at length nodding peduncles; 
involucre 2-leaved, shorter than the umbel; wool white, many times longer than 
the dark brown scales; nut obtuse. — Meadows and bogs in the upper distriets, 
Georgia, and northward. Aug. and Sept. — Culm 19 — 2? high. Leaves 3' — 6/ 
10. FIMBRISTYLIS, Vahl 
Spikes many-flowered. Scales imbricated in several rows. Perianth none. 
Stamens 1-3. Style 2-cleft, commonly flat and fringed on the margins, tumid 
at the base, deciduous. Nut lenticular. — Culms jointless, leafy at the base. 
Involuere l-severalleaved. Spikes terminal, pinbeliate or clustered. 
-* Spikes umbelled. 
LF. epadices, Vahl. Perennial ; ‘culms clustered, B 
(2 - 3° high); ves long, linear or filiform, concave, rough the margins; 
mbel sin etek aren Beer ja ikes ovate 
M^ : 
