CYPERACEJE. 659 



ORDER CYPEBACE^E. 

 CYPERUS, L. 



C. ligularis, L. (not of 1st edit.). Umbel many-rayed; spikes compact, 

 cylindrical, compound, pale; spikelets short (2" -3" long), spreading, nearly 

 terete, 7-flowered ; scales thin, ovate, acute, 7-nerved, twice the length of the 

 obovate triangular acute nut ; fachis broadly winged ; culms stout, nearly 

 terete (2 -3 high), glaucous, like the broadly linear rough-edged leaves. 

 Wet sandy places, Punta Rassa, South Florida. The C. ligularis of the 1st 

 edition is C. brunneus and C. purpurascens, Vahl. 



C. dissitiflorus, Torr. Umbel simple, 3- 4-rayed; spikelets scattered 

 along the upper portion of the slender rays, lanceolate, compressed, acute, 

 6 - 7-flowered ; scales oblong-lanceolate, acute; nut oblong-obovate, com- 

 pressed-triangular; culms filiform (l-2 high); leaves narrow-linear. 

 Mississippi, Tennessee, and westward. 



C. acuminatus, Torr. Spikelets (whitish) numerous in a compact clus- 

 ter, oblong, compressed, 20-30-flowered ; scales thin, keeled, oblong, taper- 

 ing into a spreading point, faintly 3-nerved ; nut minute, narrowly obovate ; 

 culms clustered ; leaves one or two, very narrow, like the 3-leaved involucre. 

 Low ground, Tennessee, and westward. Culms 4' -8' high. 



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

 leaves rather broadly linear; umbel 6-9-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. The spikelets are like those of C. retro- 

 fractus, Torr. 



C. cylindricus. Umbel 3-6-rayed, simple, erect; heads oblong or 

 cylindrical ; spikelets very numerous, lanceolate, 7 - 9-flowered ; scales ob- 

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

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

 leaves broadly linear, as long as the culm. (Mariscus cylindricus, EU.l) 

 Sandy Keys of Caximbas Bay, South Florida. 



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

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

 fertile ; 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. Robert's Key, Caximbas Bay, 

 South Florida. 



ELEOCHARIS, R. Br. 



E. compressa, Sulliv. Culms flat, from a creeping rootstock (l-2 

 high) ; spikes ovate-oblong, many-flowered ; scales oblong, acute, dark purple, 

 the margins white ; nut obovate, compressed, the small tubercle acute ; bris- 

 tles 1-4, very slender, about the length of the nut, often wanting. Wet 

 places, mountains of Georgia, Tennessee, and northward. 



