Obdee 155.— CYPERAOE^. 755 



53 C. dubitdta Dew. t Spike erect, oblong, short, with oblong, obtuse, black, 

 white-edged glumes; 9 spikes 2 to 4, ovate, sessile, approximate, the lowest 

 oblong and short-pedunculate, subremote, leafy-bracted, all black; perig. oval, 

 short-apiculaie, concavo-convex, orifice entire, equaling or slightly exceeding the 

 oUong-olovaie, ilack, white-edged glume; culm, 8 to 12', triquetrous, smooth, stiff, 

 with flat, smooth Ivs. (0. saxatUis Ed. 1st.) — Probably this is the plant called C. 

 saxatilis L. in the Plor. Dan., in Eng. Bot. and of Sohk. But as Dr. Boott proves 

 C. saxatilis (L) and 0. puUa (Good.) to be the same, this plant can belong to neither. 

 It is called C. rigida (Good.) by Carey in the Manuel of Gray, but differs from it 

 in many characters given by Goodenough in his full description. 



54 C. lentioularia Mx. (B. t. '76). Spilces cylindric, obtuse, rather slender, 

 near, sessile except the lowest ; S spike 1, rarely 2, 1' long, or the lower shorter; 



S spikes 2 to 5, mostly 4, leafy-bracted, not dense-flowered, the lowest more 

 remote and attenuated below; perig. ovate-elliptic, slightly convex both sides, 

 pale, then yellowish, short-beaked, longer than the narrow-oblong, obtuse glume; 

 culm 8 to 12' high, smooth, triquetrous, with flat leaves; bracts not sheathing, 

 the lowest overtopping the stem. — At L. Avalanche, N. Y. (Torr. & Gray), to 

 Bear L. (Richard.son). 

 /?. Albi-montIjja. Perig. ovate-oblong, acuminate or tapering above to a 

 point longer and more convex, and sometimes beginning to curve back- 

 wards, with a less obtuse, or short acute glume variable in length.^Ponds, 

 "White Mts. (Oakes, Tuckerman.) 

 y. Blakei. Intermediate between the two forms preceding ; fruit less acute, 

 nearly elUptioal, its glume obtuse and always shorter. — Harrison, Mo. (Rev. 

 J. Blake). 



55 C. aiirea Nutt. S Spike short, cylindric, pedunculate ; ? spikes 3, oblong, 

 loose-flowered, subpendulous, exsertly pedunculate, subapproximate, bracteate; 

 perig. globous, obovaie or peiw-form, obtuse, nerved, entire at the mouth, longer than 

 the ovate, acute or short-muoronate glume ; St. 3 — 10', slender, often subprocum- 

 bent. — Plant glabrous, green. Common in wet grounds, W. Eng. and westward 

 and northward. (C. pyriformis Schw.) 



56 C. MitohelliSna Curtis. & Spike sometimes with ? fls. in the middle ; 2 

 spikes 2 or 3, cylindric, slender, loose-flowered, remotish, pedunculate, and the 

 lowest short-sheathed; perig. ovate, acute, short-rostrate, entire at the orifice, about 

 equaling the ovate, cuspidate glume ; culm 15 to 20' high, acutely triquetrous, 

 subscabrous above, leafy towards the base. — Wet places, N. Car. (Curtis). 



57 C torta Boott (111. 1B6). Spikes cylindric, slender; 2 spikes 3 or more, very 

 long, rather hose-flowered, attermaied below, staminate at vertex, upper nearly ses- 

 sile, lower pedunculate and diverging recurved; perig. ovate, convex, terete up- 

 wards, often acuminate, recurved, about equaling the narrow-lanceolate, rathet 

 obtuse, black glume ; culm nearly 2f high, erect, rather slender, triquetrous, but 

 scarcely rough-edged, leafy towards the base ; color light green. — Wet places in 

 most of the States. (C. acuta, /3. sparsiflora, Ed. 1st.) 



58 C. caespitoBa. i Spike single, oblong, cylindric, sometimes 2, with oblong, 

 black scales; S spike 2 — 3, short-eylindric (1' long), erect, obtuse, rather thick, 

 remotish, bracteate, lowest one short-pedunculate; perig. ovate, obtuse, glabrous, 

 entire at the orifice, scarcely rostrate, a little longer than the oblong, obtuse, black 

 glume ; st. G — 14', scabrous on the edge, leafy towards the base ; Ivs. flat. — Wet 

 places, Ipswich, Mass. (Oakes) N. T. and Michigan. (Csespitosa Good. nee. L.) 



59 C. ap^rta Boott. $ Spikes 1 or 2, cyluidric, erect ; $ spikes 2 to 4, oblong- 

 cylindric, approximate above, sessile, stam. at apex, lowest somewhat remote and 

 pedunculate; perig. ovate, roundish, short-rostrate, 2-toothed, short-pedicellate, 

 sliorier than the lanceolate acute glwme; culm 1 to 18', rough-edged above. — ^Wet 

 meadows, N. Eng. and far westward and northward. (C. acuta j3. ereota Dew. 

 Ed.' 1.5t.) 



60 C. atrictior Dew. S Spikes 1 — 2, with oblong and blackish, acutish glumes ; 

 ? spikes 2 — 3, cyUndrie, S above, and hence acutish, lowest short-pedunculate ; 



psrig. ovate, compressed, acute, glabrous, entire at the ' orifice, early falling off, 

 glabrous, a Utile longer than the oblong and acute rusty glwme ; st. a foot and more, 

 triquetrous and rough on the angles, with reticnlated filaments connecting the 



