Oedeb 156.— GRAMINE^. 769 



diverging, yeined, glabrous, abruplhj coniracled to a small, round, bifurcate beak, 

 aliUlehmger tJian&e 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-oyl., slender, with 

 long-lanceolate gls. ; ? spikes 2 or 1, long-oyl., short-ped., rathe7- loose, tapering 

 ielow soTTietimes and more loose, reipote, erect, bracteate ; peria:. globous or ellip- 

 soid, inflated, short-rostrate, bidentate, yellowish, many-veintd, Tnore thorn, twice 

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

 green. — Marshes, not abundant, N. Bng. to 0. and westward. 



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

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

 tapering helow, more lax at the hose, often some nodding and braoted ; perig. in- 

 flated-ovoid, with a short, cyl, scabrous, bifurcate bealc, diverging, longer than the 

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

 long, stiff, white-edged Iva. — ?.. 1. (Olnoy). 



182 C Tuckerm^i Boott (t. 38). i Spikes 2 — 3, cylindric, lower ones sessile 

 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 in meadows, common, and has been ranked under C. bul- 

 lata. Distinguished from No. 18], by the short, smooth beak of its membranous, 

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



18.3 C. vesioaria L. S Spikes about 3, erect, oblong; S spikes 2 — 3, eyl., 

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

 inflated, rostrate, nerved, diverging, glabrous, biouspidate, nearly twice- tonger 

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

 Marshes. Not common. 



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

 glumes ; 9 spikes 2 — 3, rather oblong, cyl., nearly erect ; perig. ovaidrglobous, 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 

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

 mon. This is 0. bullata as described in Sill. Jour., Tol. ix..p.. XIs 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 here follows, 

 named from the inflation of the fruit. 



185 C. physema Dew. i Spikes 2 or 3, oyl., slenderj, contiguous, the lowest 

 bracteate; S spike 1, rarely 2, sitbrotund or obhng-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 bealc, 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 Schk.) 



186 C. oligosperma Michx. S Spikes several,, sometimes one, eiect, 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 the 

 orifice, glabrous, a httle longer than the ovate-lane. gl. ; culm I7— 2f, scabrous 

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



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



49 



