512 CTPERACKffl. (SEDGE FAMILY.) 



flowered; Bcalee (greenish or yellowish) oblong, obtuse, mncronate, closely im- 

 bricated; nut oblong; culms (l°-2°high) obtuse-angled, longer than the linear 

 leaves. (Mariscus echinatus, Ell.) — 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; Bpikelets ovate-lanceolate, flat, acute, 5-7-flowered; scales 

 ovate, mncronate, compressed-keeled, 7-nerved, the scarious Bides broadly decur- 

 rent; B*tyle deeply 2- 3-parted; stamens 2-3; nut (immature) oblong, lenticu- 

 lar or 3-angled; culms low (2' -3'), tufted, obtuse-angled, shorter tban the 

 smootb 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-cleJl : nut 3-angled : scales of the rachis at length free and 

 deciduous. Inflorescence us 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; 

 Bcales of the raehis lanceolate, acute; nut oval, compressed-3-angled, smooth 

 ami shining; culms obtuse-angled; leaves rough on the margins, pale beneath ; 

 involucds leafy, longer than the spikes. (C. tenuillorus, Ell.) — Ponds and 

 ditches, Florida, and northward. July- Sept. (JL) — Culms £°-4° high. Leaves 

 1"- 14" wide. Spikelets 2" - 8" long. 



2. KYLLINGIA, L. 



Spikelets compressed, mostly 1-flowered. Scales commonly 4, imbricated in 

 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 - 5-leaved. 

 Spikelets collected in single or clustered Bessile heads. Plants odorous. 



1. K. pumila, Michx. Heads (green) mostly 3, globose or ovate ; spike- 

 lets 1 -flowered, ovate-lanceolate, acute at each end; scale- .'), the lowest minute, 

 the middle one ovate, compressed, mncronate, mostly serrulate on. the keel, en- 

 closing the upper on,'; 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. 



2. K. sesquiflora, Ton-. Heads (white) 1-8, ovate or oblong; spikelets 

 ovate-oblong, acute, l-flowered, or imperfectly 2-flowered; scales 4-5, the two 



lower one- minute, tint third and fourth alike, ovate, acute, smooth, the fifth en- 

 Closed in the fourth ; stamen- '2 ; nut obovate ; CUlmS erect, obtuse-angled , leaves 



ami 3 - 5-leaved involucre broadly linear. — Low exposed places and along roads, 

 Middle Florida. Aug.- Sept. y. — Culms 4'-12' high. Plant pale green, 

 pleasant-scented. 



