Obdeb 156.— GRAMINEiE. lag 



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

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

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



180 C. monile Tuokm. (B. t. 11.) i Spikes 2 to 4, long-oyl., slender, with 

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

 below sometimes and more loose, remote, erect, bracteate ; peri^. globous or ellip- 

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

 longer than the oblong-lanc. gl. f culm 15 to 30', erect; Iva. 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 ; $ spikes 

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

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

 flated-ovoid, with a short, cyl, scabrous, bifurcate beak, divergmg, longer than the 

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

 long, stiff, white-edged Iva — R. I. (Olney). 



182 C. Tuckennani Boott (t. 38). S Spikes 2 — 3, cylindric, lower ones sessile 

 and short, with an oblong, acutish glume ; S 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 in meadows, common, and has been ranked under C. bul- 

 lata. Distinguished from No. 181, by the short, smooth beak of its membranous, 

 pellucid perig. aa well as by its different S spikes. 



183 C. vesiciria L. i Spikes about 3, erect, oblong; S spikes 2 — 3, oyt., 

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

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

 than the oblong-lanc. gl. ; culm about 2f; shorter than the Iva. — ^Bright green. 

 Marshes. Not common. 



184 C. biilll.ta Sohk. $ Spikes 3, erect, slender, cyl., with oblong-lanceolato 

 glumes; ? spikes 2 — 3, rather oblong, cyl, nea/rly erect ; perig. ovoid-globovs, in- 

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

 lane. gL ; culm 20 — 30' high, rather" slender, triquetrous, scabrous above, leafy 

 .ind shorter than the leaves. — Glabrous, light green. In wet meadows. Com- 

 mon. This is C. bullata as described in Sill. Jour., Vol. ix. p. 11, and named by 

 Sohk. from its (baU-shaped) globous perigyuium, comporting with his fig. 166. 

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

 named from the inflation of the fruit. 



185 C. physfema Dew. S Spikes 2 or 3, cyl., slender, contiguous, the lowest 

 bracteate ; S 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 the 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. buUata Boott, t. 39, nee Sohk.) 



186 C oligosperma Michx. S Spikes several, sometimes one, erect, slender, 

 long-cyl., with an oblong, obtusish gl. ; S spikes 1—3, ovate, globular, sessUe, 

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

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

 above, leafy below ; Ivs. involute and rush-hke, light green.— Marshes and lake 

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



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