534 r-YrERACEJE. (SEDGE FAMILY.) 



Distinguished from the next by the shorter fertile spike?, on rough stalks, and 

 by the more oblong perigynium, many-nerved at the base. (En.) 



1-21 . C. lllOlllle, Tuckcrruaii. Sterile spikes 3, rarely 2 or 4 ; fertile spikes 

 mostly 2, rarely 3 or solitary, long-cylindrical, ronute, on smooth stalks, the lowest 

 often nodding and loosely flowered ; perigynia roundish-ovoid, about 10-nerved, 

 with a short tapering beak terminating in an oblique orifice, much longer and 

 broader than the taper-pointed awnltss scale ; culm slender, sharply angled and 

 rough ; leaves and bracts green, longer than the culm. (C. bullata, var. cylin- 

 dracea, & C. vesicaria, var. cylindracea, Dew.) Bogs, New England to Ken- 

 tucky, and northward. Less robust than the last. 



128. C. ampullacea, Good. Sterile and fertile spikes 2 -3, most fre- 

 quently 2 of each, oblong or long-cylindrical, remote, sessile, or the lower on short 

 and smooth sometimes nodding stalks, the lowest loosely flowered at the base; 

 periaynia roundish-ovoid, about 17-nerved at the base and 10-nervcd at the apex, 

 abruptly contracted into a short cylindrical beak; scales lanceolate, awnless, or the 

 upper with a rough awn shorter than the perigynium ; culm slender, obtusely angled, 

 smooth ; leaves and bracts glaucous, often involute, longer than the culm. 

 Var. UTRicuiATA. Staminate spikes 3-4; fertile usually 3; perigynia oblong- 

 elliptical, tapering ; scales lanceolate, tapering, terminated (especially the lowest) by a 

 long rough awn ; culm stout, spongy at the base, smooth or rough towards the 

 summit; leaves and bracts glaucous, wide and much longer than the culm. (C. 

 utriculata, Boott.) In swamps; common northward, and from Arctic Ameri- 

 ca to the Pacific. Differs from the last two in the smooth obtuse-angled culm, 

 glaucous leaves, and particularly by the awned scale. The var. is the prevailing 

 form in the United States, and is a larger and stouter plant; but the more ellip- 

 tical fruit, and awned lower scales, do not appear sufficiently constant to sepa- 

 rate it specifically. (Eu.) 



129. C. cyliiidrica, Schw. Sterile spikes about 2; fertile spikes 2-3, 

 commonly 3, oblong or cylindrical, stout, somewhat approximate, on rough stalks, 

 the lowest often nodding; perigynia thin and transparent, much inflated, oblong- 

 ovoid, obliquely erect, tapering into a rather abrupt long-cylindrical smooth beak, 

 much longer and broader than the ovate pointed or rough-awned scale ; bracts 

 very long and, like the narrow leaves, rough and exceeding the rough culm. 

 (C. bullata, Amer. auth., not of Schk. C. Tuckermani, Dew., Boott.) Swamps, 

 W. New York to Kentucky, and northward. Differs from the next principally 

 in the more numerous and longer fertile spikes, and the larger, more inflated 

 and membranaceous ascending fruit, with smooth beaks. 



130. C. bullata, Schk. Sterile spikes 2-3; fertile spikes most frequently 

 only one, sometimes 2, approximated, oblong or cylindrical, stout, sessile or on short 

 smooth stalks; perigynia spreading, ocoid, tapering into a long-cylindrical rough 

 beak, much wider and longer than the obtusely-pointed lanceolate awn/ess scale; 

 bra<-ts and leaves narrow, about the length of the smooth or roughish culm. 

 (C. cylindrica, Twkerman, 7'orr. N. Y. Fl. (exd. syn.), not of Sc/uc.) Wet 

 meadows ; not rare, especially southward. Will distinguished from the last by 

 the short and stout, commonly solitary fertile spike, which has a squarrose ap- 

 pearance at maturity from the widely-spreading fruit ; its beak minutely (but 

 distinctly) serrulate. 



