372 North American Cyperacece. 
Caryopsis apice bidentata, inter denies bulbo styli sutura recta 
discrete brevirostris."* This genus was, however, long since 
pointed out by Richard under the name of Triodont, although 
Le described the " seed" (nut) as 3-toothed. It is probable 
that he considered the persistent bulb of the style as one of 
the teeth. — Schccnus setaceus of Muhlenberg is Rhynchospora 
cajjillacca, Torr. 
Tribe 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, Browne, Jean. p. 114; Jl. Br'oiv}i,j}rodr. 1 . p. 236 ; 
Lestib. ess. Jam. Cyp. p. 35 ; Rceni. &f Scliult. gen. 114; A^- 
ah Esenb. in Linnaet, 9. p. 301. 
Species of Schoenus, Linn., MnJil., Nntt., Sec. 
1. Cladium mariscoides. 
Culm somewhat terete ; leaves nearly smooth on the margin; 
corymb compound, 2 — 4-rayed, nearly naked; rays elongated ; 
* Linnaa, 9. p. 296. f Pers. syn. J . p. 60. 
