512 CYPERACEJE, (SEDGE FAMILY.) 
flowered ; scales (greenish or yellowish) oblong, obtuse, mucronate, closely im- 
bricated ; nut oblong; culms (1°-- 2° high) obtuse-angled, longer than the linear 
leaves. (Mariscus echinatus, E//.) — Cultivated ground, Florida to North Caro- 
lina, and westward. July Sept. — Spikelets 3" — 6” long. 
34. C. divergens, Kunth. Umbel none; head globose, shorter than the 
4-leaved involucre; spikelets ovate-lanceolate, flat, acute, 5 — 7-flowered ; scales 
ovate, mucronate, compressed-keeled, 7-nerved, the scarious sides broadly decur- 
.rent; style deeply 2-3-parted ; stamens 2-3; nut (immature) oblong, lenticu- 
lar or 3-angled; culms low (2/—3!), tufted, obtuse-angled, shorter than the 
smooth keeled leaves. — Damp cultivated grounds, Quincy, Middle Florida. 
August. — Head 3” — 4" in diameter, composed of 3-4 compact clusters ; spike- 
lets 1" long, white. 
$3. PAPYRUS. Style 3-cleft : nut 3-angled : scales of the rachis at length free and 
deciduous. Inflorescence as in No. 7. 
35. C. erythrorhizos, Muhl. Umbel 3-12-rayed, simple or compound, 
shorter than the 3 -10-leaved involucre; spikelets very numerous, narrow-linear, 
compressed, spreading, 12-50-flowered; scales minute, oblong-ovate, obtuse, 
greenish and faintly nerved on the back, yellowish and glossy on the sides ; 
scales of the rachis lanceolate, acute; nut oval, compressed-3-angled, smooth 
and shining; culms obtuse-angled ; leaves rough on the margins, pale beneath ; 
involucels leafy, longer than the spikes. (C. tenuiflorus, ZU.) — Ponds and 
ditches, Florida, and northward. July - Sept. @— Culms 4° -4° high. Leaves 
1/'-14" wide. Spikelets 2" — 8" long. : 
2. KYLLINGIA, L. 
Spikelets compressed, mostly 1-flowered. Scales commonly 4, imbricated © 
two rows, the two lower ones small and empty, the third perfect, the fourth im- 
perfect. Perianth none. Stamens 1-3. Style elongated, 2-cleft. Nut lentic- 
ular.— Culms jointless, 3-angled, leafy at the base.  Involucre 3 - 5Jeaved. 
Spikelets collected in single or clustered sessile heads. Plants odorous. 
1. K. pumila, Michx. Heads (green) mostly 3, globose or ovate; spike 
lets 1-flowered, ovate-lanceolate, acute at each end; scales 3, the lowest minute, 
the middle one ovate, compressed, mucronate, mostly serrulate on the keel, ÁÉE 
closing the upper one; nut obovate; stamens 2; culms weak, acute-angled ; 
leaves and 3— 4-leaved involucre linear. — Wet places, Florida to North Caro- 
lina. July- Sept. @— Culms tufted, 4! — 10' high. ; 
. 9. K. sesquiflora, Torr. Heads (white) 1-3, ovate or oblong ; spik nio 
ovate-oblong, acute, 1-flowered, or imperfectly 2-flowered ; scales — nhen- 
Ea 
lower ones minute, the third and fourth alike, ovate, acute, smooth, the 
. €losed in the fourth ; stamens 2; nut obovate ; culms erect, o 
.. and 3 - 5-leaved involucre broadly linear. — Low exposed places and 
