512 CYPERACE.E. (sEDGE FAMILY.) 



flowered; scales (greenish or yellowish ) oblong, obtuse, mucronate, 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 ; 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. SU/le 3-cleft : nut 3-an(jled : scales of the rachls at length free and 

 deciduous. Injiorescence 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 racliis lanceolate, acute; nut oval, compresscd-3-angled, smooth 

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

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

 ditches, Florida, and northward. July- Sept. (2) — 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-clefi;. Nut lentic- 

 ular. — Culms jointless, 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 1-flowcred, ovate-lanceolate, acute at each end ; scales 3, the lowest minute, 

 the middle one ovate, compressed, mucronate, 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 places, Florida to North Caro- 

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



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

 ovate-oblong, acute, 1-flowered, or imperfectly 2-flowered ; scales 4-5, the two 

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

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

 and 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. 



