CYPERACEJE. (SEDGE FAMILY.) 539 



terete ; scales 4-5, the two lower oiies ovate and empty, the upper lanceolate, 

 acute ; nut linear-oblong ; culm tall (2 - 4), downy and roughish, like the 

 broadly linear leaves. Barren sandy soil, Florida, and northward. July- 

 Sept. Leaves much shorter than the culm. 



39. C. retrorsus, Chapm. Umbel simple, 8-rayed ; spikes clavate-obo- 

 vate ; spikelets lanceolate, acute, reflexed, 2 - 3-flowered, the lowest flower fer- 

 tile; scales oblong, 7-nerved, scarcely longer than the oblong triangular nut; 

 rachis very slender, broadly winged ; culm smooth (2 high); leaves linear, 

 involucre longer than the umbel. Roberta's Key, Caximbas Bay, South 

 ! lorida. 



40. C. Baldwin!!, Torr. Umbel 6 - 12-rayed, shorter than the involucre; 

 heads globose or oblong ; spikelets linear, somewhat compressed, acute, 6 - 12- 

 flowered ; scales (greenish or yellowish) oblong, obtuse, mucrouate, closely im- 

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

 linear leaves. (Mariscus echiuatus, Ell.) Cultivated grouud, Florida to 

 North Carolina, aud westward. July - Sept. Spikelets 3" - 6" long. 



41. C. Lancastriensis, T. C. Porter. Culms triangular (l-2 high); 

 leaves rather broadly linear; umbel tJ-9-rayed; spikelets subulate, numerous 

 in an oval or globular head, soon reflexed, 3 - 6-flowered ; scales oblong, ob- 

 tuse, twice the length of the linear-oblong nut; rachis broadly winged. 

 Alabama (Porter), and northward. 



42. C. cylindricus, Chapm. Umbel 3 - 6-rayed, simple, erect ; heads 

 oblong or cylindrical; spikelets very numerous, lanceolate, 7 - 9-flowered ; 

 scales oblong, 7 - 9 nerved, pale, twice the length of the oblong triangular nut ; 

 rachis very slender, narrowly winged ; culms (1 -2 high) triangular, smooth ; 

 leaves broadly linear, as long as the culm. Sandy keys of Caximbas Bay, 

 South Florida. 



43. C. Blodgettii, Britton ? Umbel 3-5-rayed, simple, longer than the 

 3-leaved involucre; heads globose, dense, 3" -4" in diameter; spikelets 6-8- 

 flowered ; scales oval, obtuse, little longer than the ovate-oblong triangular 

 nut ; rachis strongly winged ; culms 6' - 12' high, much longer than the smooth 

 linear leaves. Keys of Caximbas Bay, South Florida. 



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 

 imperfect. Perianth none. Stamens 1-3. Style elongated, 2-cleft. Nut 

 lenticular. 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-flowered, ovate-lanceolate, acute at each end ; scales 3, the lowest minute, 

 the middle one ovate, compressed, mucronate, mostly serrulate on the keel, 

 enclosing 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. (T) Culms tufted, 4' - 10' high. 



