CYPERACB^. 579 



Dium 1'" diam., white (or variegated).— Hab. Jamaica \, Sw., Pd., in woods ; Trinidad I, 

 Pd. ; Haiti to Brazil !]. 



98. S. bracteata. Cm. Leaves linear: sheaths not winged, Z-gonal, &&ro\A of as- 

 perities, but mostly pubescent: ligule herbaceous, bluntly deltoid; panicles terminal $, 

 short, lax, axillary ones narrow, superior mixed of j and ? , inferior ? ; S glumes S-androns ; 

 achenium globose, transversely rugose and hairy, mucronate with the style-base : disk at 

 length double, exterior and interior broadly 3-lobed, the latter tardily separated.— Jlfort. Fl. 

 Bras. 3. t. 24 : the interior disk still included and sabeutire. — Macrolomia, Ns. — ^Leaves 

 2"'-5"' broad; achenium white, 1'" diam. or less.— Hab. Trinidad!, Pd.; [Cnbal and 

 Mexico ! to Brazil 1 and Peru !]. 



Sect. 2. Htpopohum, Ns. — Disk minute, entire, patelliform. — Stem slender ; ligule short, 

 or none ; spikelets in spicate clusters, (J , ? , or androgynous mixed. 



99. S. hirtella, <Smj. Leaves pilose, narrowly linear, superior short; spike simple: 

 clusters 8-5, distant, hirsute : bracts short ; S glumes 2-androns ; achenium globose, ''. 

 smooth, slightly mucronate, 3-gonal-3-furrowed at the base: furrows i-5-porous along the 

 upper margin : disk flat, 3-gonal. — Hypoporum, Ns. S. distans, Poir., Kth. — 1'-3' high ; i 

 spikelets 2'" long; achenium f" diam., white. — Hab. Jamaica (5w.) ; Trinidad !, Loekh., 

 Pd., Cr., common in moist savannahs ; [Florida 1 and Mexico ! to Peru ! and Brazil]. 



y' 100. S. filiformis; Sw. Leaves narrowly linear, keeled, glabrous: ligule bluntly 

 deltoid ; spikes terminal (and axillary, peduncled) : clusters few, distant, glabrous : common 

 bract long-setaceous ; 3 glumes 1-androus ; achenium globose, smooth, slightly mucronate, 

 3-furrowed at the base : furrows devoid of special pores : disk obtusely 3-gonal, brown at 

 the tumid margin. — S. purpurea, Poir., Sieb. Tr. 14 1 Hypoporum pui-puraacens, Ns. — 

 l'-2' high, usually flaccid j . spikelets 3'" long ; achenium 1'" diam., white. — Hab. Jamaica !, 

 Pd., M'Nab, Wiillschl.,m arid mountains, Manchester, Westmoreland; Antigua!, Wullschl., 

 Dominical, Imr.; Trinidad!, Sieb., dr.; [Cuba!, Haiti]. 



13. BECaUERELIA, Brongn. 



Character of Soleria, but androgynous spikelets compound at the base, the lowest glumes 

 producing special S spikelets, the middle empty, and the superior ones approximate around 

 the single ? flower. Disk adnate to the achenium, simple, entire.— Leaves devoid of a 

 ligule, lowest long, rosulate ; spikelets clustered: clusters in terminal and axillary corymbs 

 or spikes ; $ glumes \-androus. 



101. B. cymosa, 5ro«^ffl. Leaves broadly linear, keeled ; clusters in compound, di- 

 verging corymbs : axillary corymbs exceeded by their leaves ; glumes subulate, uppermost 

 exceeding the tubercled, mucronate, depressed-globose achenium.-^il/ari. PI. Bras. 3. t. 27. 

 — B. Merkeliana, Ns. — 2'-4' high ; leaves 8"'-4"' broad ; spikelets 2'" long ; achenium 

 white. — Hab. Trinidad !, dr., in savannahs ; [Guiana !, Brazil]. 



14 PTEROSCLERIA, ». 



Spikelets androgynous, compound : partial inferior few, $ , superior 1 -flowered, ? . Glumes 

 sharply keeled on the back, larger ones recurved-mucronate, lower in ? empty, 3 uppermost 

 including the flower. Style 3-fid. Achenium bony, seceding from the repand disk.^ Leaves 

 devoid of a ligule ; spikelets clustered, in singje terminal, and axillary heads. 



Nees' generic character (as well as his description of the habit) corresponds exactly with 

 our species : only what he calls geminate spikelets, is to be interpreted as the production of 

 partial spikelets from the axils of glumes, as -is evident from the structure of our plant, and 

 from the homologous organs in the allied genera Becquerelia and Calyptroearya. I am, 

 howevei-, not acquainted with the original P. guianensis, Ns. (comprising probably Scleria 

 capitata, W.), which would be distinguished by short leaves, the reduced number of spike- 

 lets and glumes, and by a smooth achenium. 



102. P. longifolia, Gr. (n. sp.). Stem erect, 3rquetrous; leaves long, linear, flat, 

 acuminate ; heads dense, snbglobose, axillary distant, shortly peduncled, or snbsessile ; ? 

 pariial spikelets numerous ; achenium white, globose, slightly 3-keeled, and longitudinally 



