CYPERACEyE. 407 



26. C. decomposita MiM. : spike decompound and paniculate ; spikelets 

 very numerous, ovoid, alternate, at length brown ; perigynium ovate, sessile, 

 convex on both sides, acute or short-rostrate, about as long as the ovate 

 acuminate scale. 



Swamps. Yates County, N. Y. Dr. Sartwell. W. to Mich. %. Culm 

 2 3 feet high, obtusely triangular, leafy. Leaves broad-linear, rough. 



Large-panicled Sedge. 



** Spikelets staminate at the base. 



27. C. trisperma Dew. : spikelets mostly 3, about 3-flowered, remote, al- 

 ternate, sessile, ovoid, uppermost one without a bract ; perigynium oblong, 

 acute or short-rostrate, entire at the point, nerved, subscabrous above, some- 

 what diverging, longer than the oblong acute whitish scale. 



Marshes and wet woods. N. Eng. and N. Y. June. 1|~ Culm 1 2 feet 

 high, triangular, slender and weak, leafy. Leaves very narrow. 



Three-seeded Sedge. 



28. C. Deweyana Schw. : spikelets about 3, sessile, ovoid-lanceolate, alter- 

 nate, rather distant, the uppermost with a bract ; perigynium oblong-lance- 

 olate, acuminate-rostrate, 2-toothed, slightly scabrous on the margin, rather 

 longer than the ovate-lanceolate awned hyaline scale. 



Woods. N. Eng. and N. Y. June. '2J.. Culm 14 feet high, weak and 

 slender, subprocumbent. Leaves yellowish-green, mostly radical, narrow. 



Dewey's Sedge. 



29. C. steltulata Good. : spikelets 3 4, roundish or ovoid, rather remote ; 

 perigynium ovate, acuminate, scabrous on the margin, at length spreading 

 horizontally, a little longer than the ovate somewhat obtuse scale. C. ster- 

 ilis WiUd. 



Wet grounds. Mass, to Car. May. 7J.. Culm 8 18 inches high, stiff, leafy 

 below. Perigynium broad-ovate, almost cordate when mature. 



Star-like Sedge. 



30. C. scirpoides Schk. : spikelets about 4, ovoid, obtuse, approximate, 

 sessile, lowest bracteate ; perigynium ovate, cordate, compressed, lanceolate 

 or rostrate, scabrous on the margin, diverging or horizontal, longer than the 

 ovate-lanceolate acute scale. 



Wet meadows. N. Eng. to Car. May. 1\.. Culm 6 12 inches high, leafy 

 at base. Perigynium erect, or spreading horizontally. Perhaps only a variety 

 of the preceding. Sdrpus-like Sedge. 



31. C. caneseens Linn. : spikelets about 6, rather remote, cylindric-ovoid, 

 with minute bracts at base ; perigynium broad-ovate, plano-convex, rather 

 acute, somewhat rough on the margin, nearly entire at the orifice, about as 

 long as the scale. C. curta Good. C. sph&rostachya Dew. 



Wet meadows. Can. N. Eng. and N. Y. May, June. 1J-. Culms about 

 2 feet high, clustered, triangular, rough above. Spikelels silvery white when 

 mature. Canescent Sedge. 



32. C. tenuiflora WahL: spikelets 2 3, roundish-elliptic, approximate, 

 the lowest bracteate at base ; perigynium elliptic, obtuse, compressed, erect, 

 about as long as the broad-ovate somewhat obtuse scale. 



Sphagnous swamps. Ver. Mass. N. Y. ; rare. June. 3J.. Culms cespitose, 

 812 inches long, very slender, often prostrate. Leaves light green, narrow- 

 linear, shorter than the culm. Slender-spiked Sedge. 



