376 OKDER 154. C 



97 O. rostrata MX. $ Spikes 1 3, capif.te, naar; perigynia 3", snberect, lance 

 olate, long-rostrate, twice longer than the acutish glume ; leaves few, rolled, subu- 

 late ; culm If. Mountain bogs, N. Y., N. H., and North. 



98 C. Ellifl'ttii Schw. t Spike slender, 1'; 9 2 or 3, globons to oval, distant; 

 perigynia iO 20, ovoid, veined, rostrate, 3" ; glume ovate,!"; calm slender, rigid, 

 1 2f, the narrow l.-aves longer. N. Car. to Fla. 



99 C. subula.ta. MX. Spike short, subsessile; 9 spikes 35, capitate, distant, 

 3-7-flowered ; perigynia subulate, 6", long-rostrate, divaricate and with 2 divaricate 

 teeth. Slender, smooth, light-green, 1 2t'. Can. to N. J. 



100 . tiirgescens Torr. $ Spike slender, 1J': 9 spikes 2 to 3, capitate to oval. 

 loose, the lowest pedunculate, exserted; perigynia 9 12. inflated, Btriate, conic- 

 rostrate, ti"; glume ovate, acute, 3". Culm 2 3f, slender; leaves long. Swamps, S. 



101 C, Iiitumesceiis Rudge. ,$ Spike long-stalked, slender; 9 13, on very 

 short stalks, capitate; perigynia 58, very large (6 7"), acuminate-beaked; glume 

 ovate-cuspidate, 2"; cnlm If; bracts very long. Wet. 



I O2 C. Grayil Carey. 9 Spikes 1 or 2, large, capitate, dense; perigynia 1530, 

 I'.-uliating. very large (7 8"), with a long, slender, smooth beak; glume inconspicuous. 

 It ver bottoms, N. Y., and West. 



I O3 C. lupulina Muhl. $ Spikes 24, lar_:e, 12' by 912", the lower on exserted 

 M;ilks; perigynia ascending, (47", ovoid and long-beaked, bicuspidate; glume 3", 

 lance-acuminate. Plant stout, leafy, 2 3f. Wet grounds. 



ft. pf.iHin-uia'a. Spikes all on long peduncles. I Glumes linear-awned as in a 

 y. amli-otruna. 9 Spikes stamiuaie at apex Approaching No. 172. 



104 C. liipiiHformi* Sartwell. 9 Spikes 4 5, very large (23'); perigynia 

 ascending. 78", the long beak roughish, bictispidate; glumes long-awned, ovate, 

 3" ; nut as broad as long, the angles knobbed. Swamps : common, 



105 C'. teiitaculata Muhl. 9 Spikes 2 or 3. dense, 1^2' by 7 or 8", near, on short 

 peduncles; perigynia 4", ovate, long-beaked, diverging, orifice obliquely 2-toothed: 

 glumes linear-awned, 2". Stout, leafy, 1 2f. Bogs : common. 



(3. altior. 9 Spikes 3 4, larger (10" thick), beak subequally toothed. 2f. 



106 C 1 . steiiolepis Ton-. $ Spike small (!') rarely 0; 9 15, very dense, 11J-, 

 often at base ; perigynin globoits, abruptly beaked, recurved, shorter than the long 

 slender-awned glumes. Related to C. squarrosa. Penn. to 111., and South. 



107 C. plaittagiiiea Lain. Spike clavate, glumes acute; 9 spikes 3 5, erect, 

 remote, loose ; pengynium 5 10, the point recurved, twice longer that) the glume ; 

 bracts purple, shorter than the spikes; leaves ti 10" broad. Woods. .March May. 



108 C. Careyaiia Torr. t, Spike oblong, erect; glumes obtuse; 9 spikes 23, 

 remote, loose, perigynium 37, large (2J"j, the point oblique, twice longer thai; 

 the glume; bracts green, much longer than the spikelets ; leaves 6 12'' wide. 

 Woods, N. Y., Pa., and W. 



109 1'. platypliyllu Carey. $ Spike clavate, glume acute ; 9 spikes 2 3, very re- 

 mote, small; perigynia 3 6, small (If) ; glume cuspidate. 1"; bracts as in C. Carey 

 ana; lea\e< li 10" wide, mostly shorter than the culms. Shades, N. States. 



110 <\ laxillbra Lam. ; Spike linear, glumes lance-oblong, acute; 9 spikes ;}. 

 slender. ]', hose, remote ; perigynia 1015, elliptic-triq., 2", the point oblique; gl. 

 oblong, mucronate, 1}" ; leaves 1-veiued, 24'' wide, bracts long. Shades : common. 



ft. paiul^fol.a. Hoot leaves (i 12" wide, bracts also wide. Otherwise as in a. 

 y. l*'ifol a. Leaves and bracts very broad ; perigynia broad, point conspicuous. 

 . bia'Ula. Bracts very long, S spike small ; 9 spikes dense; perigynia obovoid. 

 f. iHtrni.ttlia, Leave narrow, f spike on a slender stalk; perigyuia a.- in a. 

 . Ktyloilt^a, Slender, 1 2f, spike small, on long filiform peduncles, 4-ii-flowerod. 

 1 1 1 C. retroerva Dew. Spikes small (5 8"), all on long capillary peduncles, 

 the 9 3, loose : perigynia broad-ovate-triquetrous, t-carcely oblique-p< inted ; glimes 

 awned ; culms weak, If, leaves radical, wide (4">, flat, glaucous. Open woods : rare 

 112 C. dl^it.tliM Willcl. a Spike slender. 1'. stalked: 9 spikes 3, loose, 6-12", ro 



