402 CYPEIIACKJE. 



Bog3 and swamps, common. July. Aug. Culm slniuJ«r, 12 to 20 inches Mghr. 

 smooth. Spikdets about 2-iiowered. Scales lanceolate, whitish, when old brownish- 



3. R. capillacea, Torr. Capillar)/ Beak-rush. 



Culm triangular, slender; leaves hr;stlc-for:n ; spike* $ to 6 in a terminal cluster, 

 and mostly 1 or 2 on a remote axillary peduacl* ; achenium oblong-ovoid, stipitate, 

 about half the fa ogtb pf the G sto^.t bristles 



Bogs and roeky river-banks. July. £W»*,6to9 inches high. Spiheltts 1 to Z- 

 flowered. Scuta light-brown, oblong, mucn.^ 



4. IT. glomerata. Vahl. Clustered BmTc-rmk. 



Culm obtusely triangular; leaves linear, fiat: spikes Tety nunvrous in distant 

 clusters or heads, ovoid-obloug; achenium obovate, margined, narrowed at the 

 base; bristles 0, downwardly barbed. 



Low grounds. Aug Cu'm 1 to 2 feet high, smooth. Laves fiat, shorter than 

 the culm. Scales lanceolate, brownish. 



10. CLADIUM, P. Browne. Twig-rush. 



Gr. lludos, a twig or branch, application uncertain. 



Spikes ovoid- or oblong. Scales few, imbricate in a 

 somewhat trifarious manner; the lowest empty. Bristles 

 none. Stamens 2. Style 2 or 3-cleft, deciduous. 

 Achenium ovoid or globular. — Pereimidls, with leafy stem* 

 and terminal and axillary corymbs or panicles, 



C. maricoides, Torr. Smooth Ttbig-rusfc Bog-rush. 



Culm obscurely triangujfnt; cymes small, compound; spites clustesBdrsQ h--ads of 

 3 to 8 together on 2 to 4 peduncles ; style 3-cleft, with entire 1 ' 



Bogs and ponds. July, ('ulm 2 f et high, nearly smooth. Lrav^% channelled, 

 with a long compressed point. Scales aboutO, brown; A lower ones usually empty, 



II. SCLERIA-, Linn. Nut-rush. , 



Gr. styeria, hardness; from the bony or crusted fruit. 



FLOWEBS monoecious. Fertile spikes l-flowerod, usual- 

 ly intermixed with clusters of few-flowered --laminate spikes, 

 SCALES loosely imbricated, the lower empty. Stamens 1 

 to 3, Style 3-cleft Achenium globular, seated in a- 

 shallow or saucer-shaped disk. — Perennials, with triangular 

 leafy culms, and fascicled 'or gemid&d sjgk.es* 



Sec. I. SWBEBIA proper. — Perianth lobed or a ring, often ob» 



1. S. TRIGLOMERATA, Michx. I ' hrec-clustered Kut-ricdi, 



Culm broadly-ii-near leaves roughish; f<tsdcUs of spikes few, terminal and axil- 

 lary, in triple clusters, the lower peduncled-; sianxtiis 3; ackessittm ovoid-glubular r 

 slightly pointed. 



Low grounds. Juw. July. Culm 2 to 3 feet high. leafy. Leave* 2 to 3 lincfl 

 wide, rough on the inurgUi. Scales purplish. Aohemum large and white. 



2. S. PAUCIFLORA, Muhl. Few-flowered Kut-rmh. 

 Somewhat downy or nearly smooth ; leavts narrowly linear; cUisttrs few-flowered; 



