CYPERACE-U. 577 



hemispherical : involucre not ciliate at the subulate, white base, 5-7 (-3) -leaved ; sjpihelels. 

 ■white, ovate-obloug, bluntish; achenium obovate-roundish, truncate, obtusely margined, 2 

 delicately wrinkled transversely, twice as long and as broad as the compressed-conical, 

 pointed beak. — 81. t. 78./. 1. — Schofnus, Lmn. Dichromena leucocephala, Mich. — I'-IJ' 

 high ; spikelets 2"'-3"' long ; achenium pale-brown, (dark-brown, when young) : beak 

 greenish-brown, (pale, when young).— Hab. Jamaica !, Wullschl. ; [United States ! ; Cuba 1 

 to f rench islands I] . 



86. R. pura, Gr. Rhizoma creeping ; stem glabrous ; cluster ovate : involucre ciliate 

 at the base, long, 6-5-leuved ; spi&elefs white, oblong-lanceolate; acuminate ; achenium 

 obovate-roundish, margined, transversely wrinkled, 3-4 times as long and nearly as broad 

 as the compressed-conical, pointed beak. — Dichromena, Ns. — 6"-13" high; involucre 

 whitish at the base chiefly within ; spikelets 3'" long ; achenium yellowish : beak rusty- 

 brown. — Hab. Antigua I, Wullschl., S. Vincent ; [Venezuela!, Guiana]. 



87. B. Vahliana, Gr, Pilose with short down, (or stem glabrate) ; rhizoma " creep- ^ 

 iug;" cluster ovate-roundish, spreading: involucre ciliate at the base, 7-5-leaved; spikelets i 

 rufescent, ovate-lanceolate, pointed ; achenium obovate-roundish, obtusely margined, trans- 

 versely wrinkled, twice as long and nearly as broad as the compressed-conical, pointed beak. ! 

 ■:— Dichromena ciliata, V. — 1'— 2' high, slender ; involucre of the preceding ; spikelets 3'" '' 

 long; achenium rusty-variegated: beak blackish. — Hab. Jamaica !, .4Z., Wils., common j 

 Trinidad I, Cr.; [Southern United States to Brazil!]. 



88. B. Kumboldtiana, Or. Rhizoma fibrous ; stem glabrous ; cluster roundish, 

 sprea'ding: involucre ciliate at the base, 3-5-leaved, nearly green; spikelets white with y 

 reddish lines, ovate-oblong, bluntish ; achenium margined, coarsely wrinkled', as broad as 

 the depressed, rounded beak. — Dichromena, . iVi. D. pubera, Y. — i'-2' high; spikelets 

 2'" long ; achenium rusty-greenish : flattish l)eak blackish. — Hab. Trinidad !, Sieb. Tr.%; 

 [Mexico ! to Brazil ! ; Galapagos!]. ' 



89. B. Persooniana, Gr. Rhizoma " creeping ;" stem glabrous ; cluster roundish, '' 

 spreading : involucre ciliate, 5-6-leaved ; spikelets rufescent, ovate-lanceolate, pointed ; f 

 achenium obovate-roundish, obtusely margined, delicately wrinkled transversely, 4 times / 

 as long and nearly as broad as the compressed-conical, blunt beak. — Dichromena, Ns. 

 Schcenus ciliatus, Mey. ISsseq. ! — 1'-2^ high ; involucre little coloured at the base ; spikelets 

 2"'-3"' long ; achenium yellowish, with approximate darker, flexuose streaks : beak blackish. 

 — Hab. Jamaica!, Wils.; [Cuba ! and Mexico to Guiana !]. 



90. B. setigera, Gr. Glabrous ; rhizoma fascicled, filamentose at the summit ; stem 

 Subcylindrical, rigid ; leaves convolute, rigid ; cluster dense, globose, emerging from the re- 

 curved, S-leaved, not ciliate involucre; spikelets white, shortly ■ oblong-lanceolate, acumi- 

 nate, few-flowered ; " achenium obovate-roundish, transversely wrinkled, twice as long and 

 as broad as the campressed-conical, bluntish beak." — Dichromena, Kth. ! — i'-li' high 

 spikelets li'" long.— Hab. Ti-inidad !, Lockh. ; [Brazil to Uruguay !]. 



Tmbe III. SCLERINEJS. — Flowers unisexual, imbricated. Achenium often bony, 

 supported by a disk, 



13. SCLERIA, Berg. 

 Spikelets S aiid ? usually mixed, or androgynous, ? 1 {-'i)-flowered : lower glumes empty. 

 Style Z-fid. Achenium bony, supported by a hardened c?mA.— Perennials ; stem Z-angular, 

 leaved; upper glumes in ? approximate around the disk, the latter usually S-lobed. 

 Sect 1 EusCLEBlA.— 7)m* cupular, usually at length double with opposite lobes— Learns 

 ligulate : ligule opposite to the blade. Spikelets paniculate, monoecious, (or pai-tly andro- 

 gynous) : uppermost S . 



* Panicle narrow, or virgate ; disk S-lobed with the lobes entire, or truncate. 



91 S ma,tcns\s, Lindl. Uaves hro!ii\y linear : sheaths and branches of the narrow 



ianicle narrowly %-winged: ligule herbaceous, ovate-oblong, bluntish; ^glumes l-androus ; 



Zheniumdepressed-globose, smooth, enamel-like-shming wM « Wj/&yb™ _iP<7j«^: duk 



broadly S-lobed, interior adhering, exterior tardily separated.— Jforif, Fl. Sras. 6. t. li.—h. 



