ORDER 155. CYPERACE^E. 753 



23". Eng. and N. Y. Common in wet places. (C. sphserostachya Dew., Ed 2. 

 C. canescens ft. vitilis, Carey. C. vitilis Fries., &c.) 



34 C. Deweyana Schk. (B. t. 69.) Spikdets about 3, sessile, ovate- lanceolate, 

 alternate, subremote, highest bracteate; perig. oblong-lanceolate, rostrate, acumi- 

 nate, bifurcate, plano-convex, slightly scabrous on the margin, a little longer than 

 the ovate-lanceolate, awned, hyaline glume ; st. 1 4f long, subprocumbent, with 

 radical leaves ; whole plant yellowish-green. Common in open woods or on the 

 borders of woods. 



35 C. trisperma Dew. (B. t. 78.) Spikdets about 3, remote, sessile, alternate, 

 highest ebracteate ; perig. ovate-oblong, acute or short-rostrate, plano-convex, at 

 the orifice entire, nerved, subscabrous on the edges, somewhat diverging, longer 

 than the oblong, acute, and hyaline glume; st. 10 -24' high, prostrate or recurved, 

 filiform, slender, longer than the leaves. In tufts, in marshes or wet woods ; 

 common in N\ Eng. and N. Y. 



36 C. argyrantha Tuckm. M S. Spike compounded of spikekts 5 to 8, roundish, 

 obovate, alternate, subaggregated above, rounded below, with squarrous bracts, 

 except the lowest, which has a long, leafy point ; perig. ovate, compressed, at 

 length spreading, green, many-veined both sides, and winged by a wide margin, 

 lacerated above, glabrous, acuminate in a short, bifid beak, equaling the membran- 

 ous, white, lanceolate, acute glume. Amherst and Sunderland, Mass. (Tucker- 

 man.) Culm 1 to 3f high, weak, obtuse-angled, twice longer than the lance-lin- 

 ear leaves. 



37 C. teauiflora "Wahl. Spikdets 2 3, ovate, clustered, sessile, alternate, 

 lower one bracteate; perig. ovate-oblong, acutish, plano-convex, equaling the 

 oblong-ovate, hyaline or white glume ; st. a foot or more high, slender, sub pros- 

 trate, longer than the flat and narrow leaves. Light green. Spikelets whitish. 

 Burlington and Salem, Vt., in swamps (Robbins), Oriskany and Ogdensburg, N. 

 Y. (Kneiskern), Southampton, Mass. (Chapman). 



38 C. Liddoni Boott. (Illus. 51.) Spikekts 5 7, oblong-ovate, closely aggre- 

 gated ; perig. ovate, lanceolate, acuminate, oblique at the orifice, glabrous, margin 

 serrulate, scarcely longer than the ovate-lanceolate glume, which is acute and 

 hyaline on the edges ; perig. and glumes rather chestnut brown ; plant yellowish- 

 green. Brit. Am. (Boott.) Mich. (Cooley). 



39 C. alata Torr. Spike composed of 4 to 8 spikelets, ovate, large, approximate 

 and sessile; perig. roundish, sometimes obovate, nearly flat and close, abruptly 

 short-beaked, 3-veined on the back, 2-toothed, broadly winged, finally scabrous on 

 the beak, shorter than the lance-ovate glume ; culm smooth, 3 to 4f high ; Ivs. 

 rough-edgad and pale green. N. Car. to Fla. 



40 C. straminea "Wahl. Spite compound, erect ; spikelets about 6, ovate, short- 

 oblong, alternate, sessile, subapproximate ; perig. broad, roundish-ovate, com- 

 pressed, ciliate- serrate on the margin, acuminate-beaked, I-veined on the back, 

 2-toothed, widely winged, commonly shorter than the ovate-lanceolate glume , 

 st. 12 20' hifjh, longer than the leaves; spikelets whitish or tawny. Common 

 in woods andlSelds. (C. festucacea Ell. ? nee Schk.) 



a. BREVIOR Dew. Spikekts 3 5, often closely approximate, and more 

 nearly round ; perig. shorter-ovate and shorter-rostrate, scarcely longer than 

 the ovate-lanceolate glume. This is the plant originally described by Will- 

 denow. 



ft. MIXOR Dew. Spikekts small, 5 6, globous or obovate, less approximate ; 

 perig. small, ovate, acuminate, less winged, serrulate, about equaling the 

 ovate, acute glume. 



41 C. foena MuhL Spike compound, 5 to lOovato spikelets, aggregated above; 

 perig. ovate-acuminate, winged, scabrous- margined, large and close, 2-toolhed, 

 about equal to the oblong-lanceolate glumo ; culm large and smooth, leafy below ; 

 plant glaucous. Penn. (Muhlenberg) and salt marshes, R. I. (Olney). 



42 C. mirabilis Dew. Spikekts 7 11, avate-globous, alternate, sessile, often 

 closely aggregated into a lance-ovoid head, bracteate below ; perig. ovate, sublan- 

 ceolate, scabrous on the margin, concavo-convex, rostrate, 2-toothed, su'bdiverg- 

 ing, scarcely twice longer than the ovate, lanceolate glume; st. 13 3C', erect, 



48 



