574 cyPKiiACii.E. (sEUGn family.) 



7. C. Willden6vii, Schk. Slerile Jloioent 4-8, c]ose\y imbricated ; pm- 

 rjy^iia C-9, soiniwhat alternate, oIi!o»(), rouih on the. anrjies and tapering hcuk; 

 aelicnium oblong, triangular, iinely dotted ; slit/mas downy. — Copses, Mass. to 

 N. Virginia and westwaiil. 



8. C. £:teud61ii, Kuntli. Si rrilc flowers \0-\:^,x:it\\Qv loosely imbricated 

 into a linear (a])]Mrciitly distinct) spike; peritjynia 2 -.3, ruundis/i-ofiocoid, smooth, 

 with a lonij and ahrnpl row/h lieuJc : acbcnium roundish, obscurely triangular, very 

 minutely dotted; sti;/nias downy. (C. Jamesii, Schw.) — Woody hillsides, N 

 Kew Vork to Illinois and Kentucky. 



9. C. Baekii, Boott. Sterik flmrers .3, inronspinions ; pn'ifjynin 2-4, loose, 

 (floliosc-ovoid, with a rouiciil l>'(i/c, smooth througliout : achenium glohosc-pyriform, 

 scarcely dotted; stigmas smooth. — Eock}- hillL;, W. Massachusetts (Mount Tom, 

 Prof. Whitiif-y), and N. Kew York to Ohio, Lake Su])crior, and northward. — 

 Culms generally shorter, and the leafy scales broader and more conspicuous, 

 than in the last two. 



C. Spikes several or numerous, androgynous (rarely dioecious), sessile, forming a 

 compact or more or less interru])ted sometimes paniculate-compound inflores- 

 cence : stigmas 2 : arhenium lenticular. YiG'shx, Beauv. 



§ I. Spikes approximated, the staminale and pistillate flowers variously situated: 

 pcrigynia plano-convex, nerved, with a rough slightly toothed beak: bracts 

 light brown, resembling the scales, or with a prolonged point, shorter than 

 the (at maturity) brown and chaffy spikes. — Sicc.Vt.e. 



10. C. bromoides, Sehk. Sjiihs 4- G, alternate, olilong-lanceoJate, some of 

 the central ones wholly fertile : perigynia erect, narrow-hmceolate with a tapering 

 point, solid and spongy at the base, longer than the lanceolate scale ; style jointed 

 at the base. — Swamj)* : common. — Slender, occasionally diax-.ious. 



11. C. Siceata, Dew. Spites 4-8, ellipsoid, the uppermost and commonly 

 1-3 of the lowest fertile below, the intermediate ones fre<pieutly alt staminate ; peri- 

 gynia ovate-lanceolate, compressed, with a long rather abrupt beak, about the 

 length of the scale ; style minutely hairy. (C. pallida, C. A. Meyer.) — Sandy 

 plains, New England to Illinois, and northwestward. 



12. C. disticha, Iluds. Spikes numerous, short and oroid, the upper or mid- 

 dle ones frequently almost all staminate, the loiver principally or entirely frtile: peri- 

 gynia ovatc-laneeolate, the margins not united to the top, leaving a deep cleft 

 on the outer side; scale ovate, pointed, nearly the length of the perigynium. 

 (C. interml'dia, Good. C. Sartwe'llii, Dew., and former editions.) — Seneca Co., 

 New York (SurtwiH) to Illinois, Wisconsin, and northward. (Eu.) 



§ 2. .9;;//,' s pistillate below, staminate at the s'lmmit. 

 * Perigynia of a thick and corky te.rture, with a short 2-tootlK'd rouuhly margined 

 beak, nerved tow.irds the base, dark cht-stnut-broum and polihrd at maturity: 

 spikes decompound, ))aniculate: scales lijiht brown, with white membrana- 

 ceous margins ; the br.icts at the base resembling them, and with a short 

 bristly prolongation. — 1'ani(.i:l\t.t;. 



13. C. teretiliscula. Good. Spikes with short apprcsscd branches, 

 crowded in a slen<ler spiked jianicle ; perigynia ovate, unequally biconvex, short- 

 stalked, with 3-5 short nereis on the outer side near the broad somewhat heart-shaped 



