540 CYPEKACE.i;. (sKlMii; FA M I I, V.) 



2. K. odorata, Vahl. Heads (while) 1 - 3, ovate oroliloiig; 8|)ikelets 

 ovate-olilnii;;, :itiitc, l-lloweretl.or iiii|K'rfeetly :i flowered ; scales 4-5, tlie two 

 lower ones iiiiiiute, tlie tliird and fourtli alike, ovate, aeute, smooth, the fifth 

 enclosed in tlie fonrtli ; stamens 2 ; nnt ohuvale ; enlms ereet, ohl use-angled ; 

 leaves and 3-5-leaved involucre broadly linear. — Low exposed jtlaces and 

 along roads. Middle Florida. August-iSept. ^— Culms 4'- 12' hitrh 

 I'lant j)ale green, pletisaut-sceuted. 



.'?. K. monocephala, L. " Heads single, globose, comjjact ; spikelets 

 l-Howeied, miiiiaiitirous, ovate, acuminate, tiie 2 superior scales striate, nearly 

 smootli on the sides, serrulate-ciliate on the keel, the two inferior minute ; nut 

 somewhat orbicular ; involucre 3-leaved, oue of the leaves erect, the others 

 horizontal." Tuir. — Low moist jjlaces near the coast, Georgia and Florida. 

 — Hhizoma creeping. Culms 1° high. Head greenish, generally inclined. 

 Leaves abruptly pointed. 



3. DULICHIUM, Kichard. 



Spikelets linear, compressed, many-flowered. Scales imbricated in 2 rows, 

 decurrent on the joints of the rachis. I'eriauth coniijosed of 6-9 downwardly 

 hispid rigid bristles. Stamens 3. Style 2-cleft. Kut lanceolate, compressed, 

 long-beaked. — Perennial. Culms terete, jointed, leafy. Leaves numerous, 

 3-ranked, linear or lanceolate, short and spreading. Spikes numerous, soli- 

 tary in the upper axils, simple or the lower compound. Spikelets 8- 14, 2- 

 ranked, spreading, 6- 10-flowered. Scales lanceolate, many-nerved, closely 

 imbricated. Bristles nearly twice as long as the compressed or concave 

 uut. 



L D. spathaceum, Eichard. — Tonds and ditches, Florida, and north- 

 ward. August-Sept. — Culms 1°- 2° high. Leaves 1' -3' long. Spikelets 

 6"- 12" h)ng. reduucles of the lower spikes longer than the sheaths. 



4. HEMICARPHA, Xees. 



Spikes many-flowered, ovate, one or few in a terminal (apparently lateral) 

 cluster. Scales imbricated in many rows, ovate or obovate. Inner scale 

 single, behind tlie flower, very thin, minute. Periantli none. Stamens 1-2. 

 Stvle 2-cleft. — Small tufted annuals with naked culms, narrow radical leaves, 

 and an erect mostly 1 -leaved involucre. 



1. H. SUbsquarrosa, Nees. Culms nearly terete (2' -4' high); leaf 

 solitary, shorter tlian the culm; involucre 1-2-leaved, the lower erect, the 

 other short and ref^exed or wanting; spikes 2 (rarely one); scales brown, 

 ovate-oblong, acuminate ; stamens 2 ; style deeply 2-parted, smooth ; nut ob- 

 long-obovate, minutely pitted in lines. — Low sandy places, Florida, and north- 

 ward. Augu.st - Sept. — Sheaths brown. Spikes 2" - 3" long. 



5. LIPOCARPHA, K. T5r. 



Spikes many-fiowered, terete. Scales spatulate, imbricated in many rows, 

 deciduous, the lowest empty. Interior scales 2, parallel to the exterior ones, 

 membranaceous, enclosing the floAver and nut. Stamens 1-2. Style 2-3- 



