ORDER 154 CYPERACE^. 379 



149 C. pseudo-cyperus L. $ Spk. linear, 1|', 9 3-5, cylindric, thick, 12', pe- 

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

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



150 C. comosa Boott. $ Spike lin.-cylindric, 23'; $ 3, long (2 3'), cylindnc, 

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

 with 2 long spreading cusps. Stout, 2 3f. Wet. 



151 C. trlcliocarpa Mnhl. Spikes erect, i about 3, clustered, 9 3, oblong-cylindric, 

 thick but rather loose, 1J 2'; perig. conic-ovoid, 4", ascending, veined, the beak 

 slender, forked, exceeding the hyaline gl. Puberulent, 15 30'. Marshes : common. 



/3. turbimtta. Spk. $ ovoid-oblong, dense ; perig. more diverging. 



152 C. verrucosa Ell. $ Spk. 2, often 1, erect, 9 37, remote, all cylindric, dense, 

 heavy, 2 3', 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-lanrt*cens. $ Single, $ sterile at apex ; perig. broader or obovoid. South. 



153 C. lamigiiiosa MX. & Spk. 1 3, linear, 1 2', 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. fiiiformis L. Much like the last, but the leaves and bracts are convolute and 

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



155 C. striata MX. $ Spk. 14, 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 1 Jf, leaves and bracts roiled at the ends. Pa., and S. 



156 C. Iloiiglitonii Torr. a Spikes 13, ? 23, cylindric, thick (12 15" x4"), 

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

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



157 polymorplia Muhl. Spikes oblong, erect ; glume obtuse; 9 1 2, 1', the 

 lower remote, cxsert-pedunculate ; 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. Spikes 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. riparia Curtis. Spikes erect, cylindric, 23', i 25, 9 23, nearly ses- 

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

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



160 . Clierokeensis Schw. $ Spikes lance-linear, 612", 9 cylindric, 1 H', 

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

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



161 C. ampullacea Good. $ Spikes often bracted, linear; 9 34, cylindric, 

 thick, 23' by $', 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. iiionilc Tuckm. $ Spikes slender, 24; 9 2, rarely 1 or 3, cyl., 12', rather 

 loose, suberect, 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 Hi. 

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



1 63 C. Tuckermaiil Boott. ? Spikes very remote, short-stalked, cylindric-oblong, 

 thick, G 15" by G 7"; perigynia very large (5' f by 2^"), globous-ovoid, shining; 

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



1 8-4 C. Olneyi Boott. t Spikes 2-3, like those of C. bullata ; 9 spk. oftercr but 1, 

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

 short beak and 2 cusps rough-serrulate ; ach. like C. utriculata. Culm 1 ljf;.lvs. 

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



165 C. oligosperma MX. $ Spikes 12, slender; 9 12. Globular or oblong, 

 Kubsessile ; perigynia 412, turgid-ovoid, 2^", beak short, 2-lobed, scarce exceeding 

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



