ORDER 156. CYPERACEJ3. 769 



diverging, veined, glabrous, abruptly contracted to a small, round, bifurcate beak, 

 a little longer than the lanceolate glume; culm 20 to 30', obtuse-angled, with long 

 Ivs. and bracts; light green. Marshes over the country, not abundant. 



180 C. monile Tuckm. (B. t. 71.) $ Spikes 2 to 4, long-cyl., slender, with 

 long-lanceolate gls. ; $ spikes 2 or 1, long-cyl., short-ped., rather loose, tapering 

 beloiv sometimes and more loose, remote, erect, bracteate ; perig. globous or ellip- 

 soid, inflated, short-rostrate, bidentate, yellowish, many-veined, more than twice 

 longer than the oblong-lane, gl. ; culm 15 to 30', erect; Ivs. and bracts long, bright 

 green. Marshes, not abundant, N. Eng. to 0. and westward. 



181 C. Olneyi Boott (t. 40.) $ Spikes about 3, cyl., slender, near ; 9 spikes 

 commonly 2, cyl., thick, dense, yellowish, approx. more or less ped., the lowest 

 tapering below, more lax at the base, often some nodding and bracted ; perig. in- 

 flated-ovoid, with a short, cyl, scabrous, bifurcate beak, diverging, longer than tha 

 lane. gl. ; culm 15 to 22', stout, obtuse-angled, rough above, shorter than tho 

 long, stiflj white-edged Ivs. R. I. (Olney). 



182 C. Tuckennani Boott (t. 38). $ Spikes 2 3, cylindric, lower ones sessilo 

 and short, with an oblong, acutish glume ; $ spikes 2 3, oblong, cyl., thick and 

 large, scarcely pedunculate, subloose-flowered ; perig. much inflated, ovate, large, 

 conic, costate, bifurcate, all glabrous, nerved, twice longer than the ovate-lane, 

 gl. ; culm about 2f, erect, scarcely scabrous ; bracts and Ivs. long, not wide ; light 

 green. Wet places io . meadows, common, and has been ranked under C. bul- 

 lata. Distinguished \^* . No. 181, by the short, smooth beak of its membranous, 

 pellucid perig. as well as by its different ? spikes. 



183 C. vesicaria L. $ Spikes about 3, erect, oblong; ? spikes 2 3, cyl., 

 erect, dense-flowered, alternate, long-bracteate ; perig. ovate, oblong-conic, terete, 

 inflated, rostrate, nerved, diverging, glabrous, bicuspidate, nearly twice longer 

 than the oblong-lane, gl. ; culm about 2f, shorter than the Ivs. Bright green. 

 Marshes. Not common. 



184 C. bullata Schk. $ Spikes 3, erect, slender, cyl., with oblong-lanceolato 

 glumes ; ? spikes 2 3, rather oblong, cyl, nearly erect ; perig. ovoid-globous, in- 

 flated, glabrous, costate, with a long, scabrous beak, bifurcate, longer than tho 

 lane. gl. ; culm 20 30' high, rather slender, triquetrous, scabrous above, leafy 

 and shorter than tho leaves. Glabrous, light green. In wet meadows. Com- 

 mon. This is C. bullata as described in Sill. Jour., Vol. ix. p. 71, and named by 

 Schk. from its (ball-shaped) globous perigynium, comporting with his fig. 166. 

 Carey and others have adopted another form under that name, which hero follows, 

 named from the inflation of tho fruit. 



185 C. physema Dew. $ Spikes 2 or 3, cyl., slender, contiguous, the lowest 

 bracteate; $ spike 1, rarely 2, subrotund or oblong-cyl, thick, dense-flowered, re- 

 mote, yellowish, the lowest ped., at length nodding, with a bract leafy and surpass- 

 ing the culm ; perig. turgid-ovate, with a long, cyl., scabrous beak, divaricate, in- 

 flated, glabrous, broader and longer than tho lanceolate, acute, white-edged gL ; 

 culm 12 to 24', slender, firm, shorter than the narrow, flat, firm, light green Ivs. 

 N. Eng. to Penn., in humid meadows. (C. bullata Boott, t 39, nee Schk.) . 



186 C. oligosperma Micks. $ Spikes several, sometimes one, erect, slender, 

 long-cyl., with an oblong, obtusish gl. ; ? spikes 1 3, ovate, globular, sessile, 

 distant; perig. few, ovate, inflated, acute, nerved, short-rostrate, entire at tho 

 orifice, glabrous, a little longer than the ovate-lane, gl. ; culm 1 2f, scabrous 

 above, leafy below ; Ivs. involute and rush-like, light green. Marshes and lako 

 borders, Can., N. Eng., N. Y., Mich, and Go. 



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