ORDER 155. CYPERACE^E. 755 



53 C. dubitata Dew. $ Spike erect, oblong, short, with oblong, obtuse, black, 

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

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

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

 oblong -obovate, black, white-edged glume; culm, 8 to 12', triquetrous, smooth, stiff, 

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

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

 C. saxatilis (L) and C. pulla (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 difiers from it 

 in many characters given, by Goodenough in his full description. 



54 C. lenticularis MX. (B. t. 16). Spikes cylindric, obtuse, rather slender, 

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



$ spikes 2 to 5, mostly 4, leafy-bracted, not dense-flowered, the lowest moro 

 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. (Richardson). 



(?. ALBI-MONTANA. 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 glumo variable in, length. Ponds, 

 White Mts. (Oakes, Tuckerman.) 



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

 nearly elliptical, its glumo obtuse and always shorter. Harrison, Me. (Rev. 

 J. Blake). 



55 C. ailrea Nutt. $ Spike short, cylindric, pedunculate; $ spikes 3, oblong, 

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

 perig. globous, obovate or pear-form, obtuse, nerved, entire at the mouth, longer than 

 the ovate, acute or short-mucronate glumo ; st. 3 10', slender, often subprocum- 

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

 and northward. (C. pyriformis Schw.) 



56 C. Mitchelliana Curtis. $ Spiko sometimes with $ fls. in the middle ; 2 

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

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

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

 subscabrous above, leafy towards tho base. "Wet places, N. Car. (Curtis). 



57 C. torta Boott (111. 156). Spikes cylindric, slender; ? spikes 3 or more, very 

 long, rather loose-flowered, attenuated 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, rather 

 obtuse, black glumo ; 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. ceespitosa. $ Spiko single, oblong, cylindric, sometimes 2, with oblong, 

 black scales; $ spike 2 3, short-cylindric (!' 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. 6 14', scabrous on the edge, leafy towards the base ; Ivs. flat. Wet 

 places, Ipswich, Mass. (Oakes) N. Y. and Michigan. (Crespitosa Good. nee. L.) 



59 C. aperta Boott. $ Spikes 1 or 2, cylindric, 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, 

 shorter than the lanceolate acute glume ; culm 1 to 18', rough-edged above. Wet 

 meadows, N. Eng. and far westward and northward. (C. acuta p. erecta Dew. 

 Ed. 1st.) 



60 C. strictior Dew. $ Spikes 1 2, with oblong and blackish, acutish glumes ; 

 ? spikes 2 3, cylindric, $ above, and hence acutish, lowest short-pedunculate ; 



perig. ovate, compressed, acute, glabrous, entire at the orifice, early falling oflj 

 glabrous, a little longer than the oblong and acute rusty glume ; st. a foot and more, 

 triquetrous and rough on the angles with reticulated filaments connecting tho 



