Ordbr 165.— CTPERACE^ 756 



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

 white-edged glumes; 5 spikes 2 to 4, ovate, sessile, approximate, the lowest 

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

 short-apiciUcUe, concavo-convex, orifice entire, equaling or slightly exceeding tha 

 eblong-obovate, Hack, 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. 

 saxatQis 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 0. 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. lentlculdris Mx. (B. t. 16). Spikes cylindric, obtuse, rather slender, 

 near, sessile except the lowest ; $ 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. T. (Torr. & Gray), to 

 Bear L. (Richard.son). 

 /3. Albi-montXita. 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. Elakei. Intermediate between the two forms preceding ; fruit less acute, 

 nearly elUptical, its glume obtuse and always shorter. — Harrison, Me. (Rev. 

 J. Blake). 



55 C. aCirea Nutt. a Spike short, cylindric, pedunculate; S spikes 3, oblong, 

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

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

 the ovate, acute or short-mucrouate glume ; 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. MitohelliElna Curtis, t Spike sometimes with ? fls. in the middle ; s 

 spikes 2 or 3, cylindric, slender, loose-flowered, remotlsh, 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, 

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



57 C. torta Boott (HI. 156). Spikes cylindric, slender; 'i spikes 3 or more, vary 

 long, ratlier loose-flowered, atienvMed 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 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, p. sparsiflora, Ed. 1st.) 



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

 black scales; 9 spike 2 — 3, shorlrcylindric (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. 6 — 14', scabrous on the edge, leafy towards the base ; Ivs. flat. — Wet 

 places, Ipswich, Mass. (Oakes) N. T. and Michigan. (C^spitosa Good. nee. L.) 



59 C. ap6rta Boott. (, Spikes 1 or 2, cylindric, erect ; 9 spikes 2 to 4, olbng- 

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

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

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

 meadows, N. Eng. and far westward and northward. (C. acuta (3. erecta Dew. 

 Ed. 1st.) 



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

 J spikes 2 — 3, cylindric, S above, and hence acutish, lowest short-pedunculate ; 



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

 glabrous, a little longer than the oblong and actiie rusty glume ; St. a foot and more, 

 triquetrous and rough on the angles, with retieiJated filaments connecting tb» 



