376 ORDER 154. C XTERACE^E. 



97 C. rostrata MX. $ Spikes 1 3, capif.te, near; perigynia 3-", saberect, Line* 

 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. Ellie ttii Schw. $ Spike slender, 1' ; $ 2 or 3, globous to oval, distant ; 

 perigynia 1020, ovoid, veined, rostrate, 3" ; glume ovate, 1"; culm slender, rigid, 

 1 2f, the narrow leaves longer. N. Car. to Fla. 



99 C. subulata 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 2f. Can. to N. J. 



100 C. turgescens Torr. $ Spike slender, 1J'; $ spikes 2 to 3, capitate to oval, 

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

 rostrate, 6"; glume ovate, acute, 3". Culm 2 3f, slender; leaves long. Swamps, S. 



101 C. intumescens Rudge. $ Spike long-stalked, slender; ? 13, on very 

 short stalks, capitate ; perigynia 58, very large (6 7'0, acuminate-beaked ; glume 

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



102 C. Grayii Carey. ? Spikes 1 or 2, large, capitate, dense; perigynia 1530, 

 radiating, very large (78"), with a long, slender, smooth beak ; glume inconspicuous. 

 River bottoms, N. Y., and West. 



103 C. lupulina Muhl. $ Spikes 24, large, 12' by 912", the lower on exserted 

 stalks ; perigynia ascending, 6 7", ovoid and long-beaked, bicuspidate ; glume 3", 

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



/3. peduncula.a. Spikes all on long peduncles. $ Glumes linear-awned as in a, 

 y. androg-f/na. ? Spikes stamiuate at apex Approaching No. 172. 



104 C. lupulilormis Sartwell. $ Spikes 45, very large (23'); perigymu 

 ascending, 7 8", the long beak ronghish, bicuspidate ; glumes long-awned, ovate, 

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



105 . teiitaeulata Muhl. ? Spike* 2 or 3, dense, If 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. 



ft. altior. $ Spikes 34, larger (10" thick), beak subequally toothed. 2f. 



106 C. stenolepis Torr. $ Spike small (!') rarely 0; ? 15, very dense, 1 If , 

 often $ at base ; perigyuia globous, abruptly beaked, recurved, shorter than the long 

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



107 C. plaiitagiiiea Lam. $ Spike clavate, glumes acute; ? spikes 3 5, erect, 

 remote, loose ; perigynium 510, the point recurved, twice longer than the glume ; 

 bracts purple, shorter than the spikes; leaves 6 10" broad. Woods. March May. 



108 . Careyaiia Torr. $ Spike oblong, erect; glumes obtuse; $ spikes 23, 

 remote, loose ; perigynium 3 7, large (2f '), the point oblique, twice longer than 

 the glume; bracts green, much longer than the spikelets ; leaves 612" wide. 

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



109 . platyphylla Carey. $ Spike clavate, glume acute ; ? spikes 2 3, very re- 

 mote, small; perigynia 3 (5, small (W); glume cuspidate, 1"; bracts as in C. Carey- 

 ikna; leave? 610" wide, mostly shorter than ihe culms. Shades, N. States. 



HO C. laxiflora Lam. $ Spike linear, glumes lance-oblong, acute; ? spikes 3, 

 slender, 1', loose, remote; perigynia 1015, elliptic-triq., 2", the point oblique; gl. 

 oblong, mucronate, iy ; leaves 1-veined, 24" wide, bracts long. Shades : common. 

 /3. patnlifolia. Root leaves 6 12" wide, bracts also wide. Otherwise as in a., 

 y. latif'olia. Leaves and bracts very broad ; perigynia broad, point conspicuous. 

 6. htanda. Bracts very long, $ spike small ; $ spikes dense ; perigynia obovoid. 

 . intern.tdia. Leaves narrow, a spike on a slender stalk ; perigynia as in a. 

 . itylontjca. Slender, 1 2f, spike small, on long filiform peduncles, 4-ti-flowered. 



111 C. retrocurva Dew. Spikes small (58"), all on long capillary peduncles, 

 the ? 3, loose ; perigynia broad-ovate-triquetrous, t-carcely oblique-printed ; glimeg 

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



112 C. digitalis Willd. $ Spike slender, 1', stalked; spikes 3, loose, fr-12", r 



