Order 155.— CYPERACE^. 753 



— N. Eng. and N. Y. Common in wet places. (C. Bphasrostachya Dew., Ed. 2. 

 C. canescens j3. vitilis, Carey. C. vitilis Fries., &c.) 



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

 alternate, subremote, highest braeteato ; perig. oblong-lanceolaie, rostrate, acumi- 

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

 the ovate-lanceolate, awned, hyaline glume; si. 1 — 4flong, subprocumbeut, with 

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

 borders of woods. 



35 C. trisperma Dew. (B. t. ?8.) Spikelets about 3, remote, sessile, alternate 

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

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

 than tho oblong, acute, and hyalino glume; st. 10 — 24' high, prostrate or recurved 

 filiform, si -'uder, longer than tho leaves. — In tufts, in marshes or wet woods* 

 common in N. Eng. and N. Y. 



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

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

 except the lowest, which ha3 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, twico longer than tho lance-lin- 

 ear loaves. 



37 C. tenuiflora "Wahl. Spikelets 2 — 3, ovato, clustered, sessile, alternate, 

 lower one bracteato; perig. ovate-oblong, acutish, plano-convex, equaling tho 

 oblong-ovate, hyaline or white glumo ; st. a foot or moro high, slender, subpros- 

 trate, longer than tho 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.) Spikelets 5 — 1, oblong-ovate, closely aggre- 

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

 Berrulate, scarcely longer than tho ovatc-lanceolato glume, which is acute and 

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

 green. — Brit. Am. (Boott.) Mich. (Coolcy). 



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

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

 slwrt-beaked, 3-veined on the back, 2-toothed, broadly winged, finally scabious on 

 the beak, shorter than tho lance-ovato glume ; culm smooth, 3 tD -if high ; Ivs. 

 rough-edged and pale green. — N. Car. to Fla. 



40 C. stramniea Wahl. Spike compound, erect ; spikelets about 6, ovate, short- 

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

 pressed, ciliate-serrate on tho margin, acuminate-beaked, 1-veined on the lack, 

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

 et. 12 — 20' high, longer than tho leaves; spikelets whitish or tawny. — Common 

 in woods and fields. (C. festucacea Ell. ? nee Schk.) 



a. brevior Dew. Spikelets 3 — 5, often closely approximate, and moro 

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

 tho ovato-lanccolato glume. — This is tho plant originally described by "Will- 

 denow. 



p. Mixon Dew. Spikelets small, 5 — G, globous or obovate, less approximate ; 

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

 ovate, acuto glume. 



41 C. foenea iiuhl. Spike compound, 5 to 10 ovate spikelets, aggregated above; 

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

 about equal to tho oblong-lanceolate glume ; culin largo and smooth, leafy below; 

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



42 C. rnirabilis Dew. Spikelets 7 — 11, ovate-globous, alternate, sessile, often 

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

 ceolate, scabrous on tho margin, concavo-convex, rostrate, 2-toothed, subdiverg- 

 ing, scarcely twico longer than tho ovate, lanceolato glumo; st. 18 — 3G', orect, 



43 



