CYPKRACr.r- (SKDGE FAMILY.) 529 



and ditilios, FluritlM, and northward. July- Sept. — Leaves \°-2° loni^. Nut 

 and tubercle laarly 1 ' lonj;. 



2. C. macrostaehyus, Gray, var. patulus. Corymbs very large, 

 decoinpoiuid, dirtu.se ; style minutely 2-eleft; nut broadly obovate ; bristles slen- 

 der, .twice as long as the nut ; otlierwise like No. 1. — Ponds and ditches, Florida, 

 and northward. August. — Culms 3° -4° high. Terminal corymbs often 1° 

 in diameter. 



•3. C. capitatus, n. sp. Culms (2° - 3° higli) nearly terete, straight, like 

 the long na;row erect and channelled leaves; spikes densely clustered in 1-0 

 globular heads, the lateral heads long peduncled and somewhat corymbose ; 

 scales about 9 (the fourth fertile), whitish; style very long, minutely 2-clcft ; nut 

 obovate, lenticular, obscurely wnnklcd, hispid on the margins above, shorter 

 than the 6 slender bristles ; tubercle bristle-awl shaped, twice as long as the nut. 

 — Fine-barren jionls, jMiddle and West Florida June - Aug. — Leaves 2" -4" 

 wide, as long as the culm. Head composed of 30 or more spikes'.' Nut and 

 tubercle 3" long. 



16. CH^TOSPORA, R.Brown. 



Spikes few- (1 -8-) flowered. Scales imbricated in two rows ; the lower ones 

 empty, the upper bearing perfect flowers. Perianth of 3 - 6 scabrous or plumose 

 bristles. Stamens 3. Style 3-cleft, not dilated at the base, nearly deciduous. 

 Nut triangular, mostly pointed by the persistent base of the style. — Leaves 

 radical, narrow. Spikes in a terminal cluster, subtended by a 1 - 2-leaved in- 

 volucre. 



1 C. nigricans, Kunth. Culms tufted, erect, slightly compressed, smooth 

 and rigid, jointed near the summit ; leaves rigid, erect, semi-terete, rough on the 

 margins, shorter than the culms ; sheaths black ; involucre 2-leaved, the lowest 

 longer than the ovoid dark brown head; spikes ovate-lanceolate, compressed, 

 6-8-flowered; scales ovate, compressed-keeled, the lowest mucronate; raehis 

 zigzag; bristles 6, unequal, compressed, dilated at the base, hispid upward, 

 longer than the globose-3-angled white and polished nut. ( Schoenus nigricaris, 

 L.) — Damp soil, near Marianna, West Florida, and salt marshes, near St. 

 Mark, Middle Florida. May. y.— Culms 1°- U° high. Although differing 

 in some particulars, the Florida plant is probably not distinct from that of the 

 eastern hemisphere. 



17. PSILOCARYA, Torr. 



Spikes many-flowered, terete. Scales imbricated in several rows, membrana- 

 ceous, all bearing perfect flowers. Perianth none. Stamens 2. Style 2-cleft. 

 Nut biconvex, transvei-sely wrinkled, crowned with the persistent base of the 

 style. — Culms leafy. Spikes ovate, disposed in spreading lateral and terminal 

 corymbs. 



1. P. rhynehosporoides, Ton-. Culms nearly terete (^°-2° high); 

 leaves narrowly linear, longer than the culm ; corymbs 2-3, widely spreading, 

 the terminal one mostly compound ; spikes pediccUcd ; scales ovate, acute ; nut 



45 



