ORDER 154. CYPERACE^E. 379 



149 C. pseudo-cyperus L. s Spk. linear, If, 8 . 3 5, cylindric, thick, 12', pe- 

 dunculate, recurved ; perig. horizontal or deflexed, lanceolate, with 2 snberect teeth, 

 equaling the lance-aristate glume. Ponds and ditches, Can. to Pa. 



150 C. comosa Boott. t Spike lin.-cylindric, 23'; 9 3, long (2 3'), cylindnc, 

 thick, dense-curved, on recurved ped. ; perig. lance-linear, deflexed, the slender beak 

 with 2 Ion? spreading cusps. Stout, 2 3f. Wet. 



151 C. trlcliocarpa Muhl. Spikes erect, t about 3, clustered, 9 3, ohlong-cylindric. 

 thick but rather loose, 11 2'; perig. conic-ovoid, 4", ascending, veined, the beak 

 slender, forked, exceeding the hyaline gl. Pnberulent, 1530'. Marshes : common. 



|3. inrbiniita. Spk. 9 ovoid-oblong, dense ; perig. more diverging. 



152 C. verrucosa Ell. $ Spk. <>, often 1, erect, 9 3 7. remote, all cylindnc, dense, 

 heavy, 23', bracts long, on long sheaths ; perig. ovate-triquetrous, shorter than the 

 awn of the oblong glume. Culm and leaves 2 3f. Wet grounds, S. 



ft. g-lauctticens. t Single, 9 sterile at apex ; perig. broader or obovoid. South. 



153 C. laniiglnosa MX. $ Spk. 13, linear, 12', the upper stalked, 9 mostly 2, 

 nearly sessile, oblong-cylindric, 915" ; leaves and bracts flat ; perig. ovoid, with 2 

 sharp teeth, equaling the lanceolate awned glume. 1 2f. Wet places : common. 



154 C. lilliormis L. Much like the last, but the leaves and bracts are con volute and 

 rush-like, and the 9 glumes ovate, acute. Pale. Marshes : common. 



155 C. striata MX. 3 Spk. 1 4, erect, the lower sessile ; 9 12. remote, cylindric, 

 erect, dense ; perigynia ovoid, acuminate, 2-toothed, twice longer than the ovate 

 acute glumes. Stiffly erect, 1 ] Jf. leaves and bracts roiled at the ends. Pa., and S. 



156 C. Houglitoiill Torr. t Spikes 13. ? -1 3, cylindric, thick (12^15" x 4"), 

 near, snbsussile, erect; perigynia ovoid-inflated, bifurcate, much longer than the 

 ovate cuspidate glume. Stout. 2 3f. leaves and bracts flat. Me. to Wis. 



167 C. polyniorpha Muhl. Spikes oblong, erect; glume obtuse; 9 12, 1', the 

 lower remote, cxsert-pedunciilate ; bracts and leaves short; perigynia oval-ovate, 

 beak short, purple, exceeding the ovate purplish gl. Erect, 520'. Sands, Pa., and N. 



158 C. paludosa Good. Spiki-s erect, cylindric, 15 20", dense, near; glume cus- 

 pidate; 9 spikes about 3; bracts long, sheathless; perigynia ovate, short-beaked, 

 equaling the narrow glumes. Erect, 1J 2f ; leaves channeled. Marshes, Mass. 



159 C. rlparla Curtis. Spikes erect, cylindric, 2 3', t 25, 9 23, nearly ses- 

 sile; bracts and leaves long; perigynia conic-lanceolate, with 2 slender teeth, some 

 longer than the narrow-awned glumes. Stout, 2 4f. Shores. (C. lacustris.) 



160 C. Cherokeensls Schw. t Spikes lance-linear, 612", 9 cylindric, 1 If, 

 2 7, the lower nodding, on uxserted peduncles ; perigynia lance-ovate, much longer 

 than the ovate glume. Slender, 2f, light green. Ga., f la., and West. 



161 C. ampullacea Good, t Spikes often bracted, linear; 9 3 4, cylindric, 

 thick, 23' by f , very dense, near, suberect ; perigynia ovoid, more or less abruptly 

 beaked, bifurcate, larger than the pointed glumes. Stout, 2 3f, the flat leaves longer. 

 Swamps, N. Eng. to Pa., and West. (C. utriculata, Bt.) 



162 C. iiion ile Tuckm. s Spikes slender, 24; 9 2, rarely 1 or 3, cyl., 12', rather 

 loose, euberect, short-ped. ; perig. ovoid, polished, 2 3", the short slender beak bifur 

 cate, twice longer than the lance-oblong glume. Bright green, 2f. N. Eng. to 111. 

 (C.Vaseyi Dew. is the same plant, as shown by specimens from Dr. S. II. Wright.) 



163 C. Tuckermaul Boott. s Spikes very remote, short-stalked, cylindric-oblong, 

 thick, 615" by 67" ; perigynia very large (5" by 2f '), globous-ovoid, shining ; 

 beak short, slender ; glumes much shorter. 2f. Wet : common. 



J 84 C. Olneyl Booit. i Spikes 28, like those of C. bullata ; 9 spk. oftener but 1, 

 1' 18" by 5"; ped. short; perig. 5080, 2j 3" long, 10-veined, turgid-ovoid, the 

 short beak andt, cusps rough-serrulate; ach. lik C. ampullacea. Culm 1 IJf; Ivs. 

 taller, 1" wide. Wet grounds, R. I. 



165 C. oligowperma MX. t Spikes 12, slender; 9 12. Globular or oblong, 

 Bubsessile ; perigynia 412. turgid-ovoid, 2f ', beak short, 2-lobed, scarce exceeding 

 the ovate glumes. Slender, 2f ; leaves and bracts rolled. Pa., and North. 



