372 North American Cyperacea. 



Caryopsis apice bidentata, inter dentes bulbo styli sutura recta 

 discrete brevirostris."* This genus was, however, long since 

 pointed oufby Richard under the name of Triodont, aUhough 

 he described the "seed" (nut) as 3-toothed. It is probable 

 that he considered the persistent bulb of the style as one of 

 the teeth. — Schoenus sctaceus of Muhlenberg is Rhyncliospora 

 capillacea, Torr. 



TiiiBE V. CLADIEiE. 



Flowers perfect (rarely diclinous). Scales of the spikes 

 imbricated in a trifarious or quadrifarious order, one or few- 

 flowered ; the inferior scales sterile. Perigynium 0, or cup- 

 shaped, or in the form of bristles. Nut with a hard thick 

 shell, smooth or irregularly wrinkled, pointless or attenuated 

 into a beak. 



19. CLADIUM, Browne. 



Spikes few-flowered ; flowers polygamous. Scales imbri- 

 cated in a somewhat trifarious order ; the lower ones empty. 

 Bristles 0. Stamens 2. Style 2 — 3-cleft, deciduous ; 

 the divisions often bifid or trifid. Nut subglobose ; the peri- 

 carp thickened and corky towards the summit. Seed smooth. 

 .- — Culm leafy ; spikes mostly in compound axillary and terminal 

 panicles or corymbs. 



Cladium, Broivne, Jam. p. 114; R. Brown, prodr. 1. p. 236; 

 Lestib. ess. /a.m. Cyp. p. 35 ; Rcem. ^ ScJiult. gen. 114; N. 

 ah Esenb. in Linnaa, 9. p. 30 1 . 



Species of Schoenus, Linn., Mnhl., Nutt., Sec. 



1. Cladium mariscoides. 



Culm somewhat terete ; leaves nearly smooth on the margin ; 

 corymb compound, 2 — 4-rayed, nearly naked ; rays elongated ; 



* Linntra, 9. p. 296. f Pers. syn. J . p. 60. 



