512 cyPERACEiE. (sedge fa:mii.v.) 



flowoivd ; scales (frrccnisli or ycllowisli) olilonpr, ohtiiso, iinirionatc, closely im- 

 bricatcil ; nut ohloiij;; ; culms (l°--2° lii;.^li) oI)tuse-iin;;le(i, l<)n;.'er tli;in tlie linear 

 leaves. (Marisciis ediiiiatus, Ell.) — Cultivated f,'roiin(l, Florida to North Caro- 

 lina, and westward. July - Sept. — 8i)ikelets 3"- G" long. 



34. C. divergens, Knnth. Umbel none ; head gloijose, shorter tlian the 

 4-leavcd involucre; .>-iiikelets ovatc-laneeolate, flat, acute, 5-7-flowered; scales 

 ovate, mueronate, compressed-keeled, 7-nerved, the scarious sides broadly dccur- 

 rcnt; style deeply 2- 3-parted ; stamens 2-3; nut (immature) oblong, lenticu- 

 lar or 3-anglcd; 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. PAPYKUS. Sli/le 3-clf/t: nut H-anr/kd : scales of ihe rachis at length free and 

 deciduous. Iiijiorescence as m No. 7. 



35. C. erythrorhizos, Midd. Umbel 3- 12-rayed, simple or compound, 

 shorter than the 3-10-Ieaved 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; 

 ecales of the rachis lanceolate, acute ; nut oval, compressed-3-angled, smootli 

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

 involucels leafy, longer than tlie spikes. (C. tenuiflorus, Ell.) — Ponds and 

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

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



2. KYLLINGIA, L. 



Spikelets compressed, mostly 1-flowcrcd. 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 jointlcss, 3-angled, leafy at the base. Involucre 3-5-leaved. 

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



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

 lets l-flowered, ovate-lanceolate, acute at each end; scales 3, the lowest minute, 

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

 closing the upper one ; nut obovate ; stamens 2 ; culms weak, acute-angled ; 

 leaves and 3-4-leaved involucre linear. — Wet plac-es, Florida to North Caro- 

 lina. July- Sept. ®— Culms tufted, 4' - 10' high. 



2. K. sesquiflora, Torr. Heads (white) 1 -3, ovate or oblong; spikelets 

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

 lower ones minute, the third and fourth alike, ovate, acute, smooth, the Hfth en- 

 closed in the fourth ; stamens 2 ; nut obovate ; culms erect, obtuse-angled ; leaves 

 and 3 - 5-leaved involucre broadly linear. — Low exposed j)laccs and along roads. 

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

 pleasant-scented. 



