Order 155.— CYPERACE^E. 755 



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

 white-edged glumes; 2 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 th« 

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

 with flat, smooth lvs. (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 differs from it 

 iu 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 tho lower shorter; 



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

 remote and attonuated below; perig. ovate-elliptie, 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 r.ot sheathing, 

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

 Bear L. (Richardson). 



[3. Albi-MONTANA. Perig. ovate-oblong, acuminate or tapering abovo to a 

 point longer and more convex, and sometimes beginning to cr.rvo 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 loss acute, 

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

 J. Blake). 



55 C. aurea Nutt. t Spike short, cylindric, pedunculate; 2 spikes 3, oblong, 

 loose-flowered, subpendulous, exscrtly pedunculate, subapproxitnate, braeteate; 

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

 the ovate, acute or short-mucronato 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. S Spiko sometimes with 2 fls. in the middle ; $ 

 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 

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

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



57 C. torta Boott (111. 1 36). Spikes cylindric, slender; 2 spikes 3 or more, very 

 long, rather hose-floicered, attenuated beknc, staminato at vertex, upper nearly ses- 

 6ile, lower pedunculate and diverging recurved; perig. ovate, convex, terete up- 

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

 obtuse, black glum 2: culm nearly 2f high, erect, rather slender, triquetrous, but 

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

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



58 C. casspitcsa. $ Spiko single, oblong, cylindric, sometimes 2, with oblong, 

 black scales; 2 spike 2 — 3, short-cylindric (V long), erect, obtuse, rather thick, 

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

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

 glume ; st. C — 14', scabrous oa the edge, leafy towards the base ; lvs. flat. — "Wet 

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



59 C. aperta Boott. $ Spikes 1 or 2, cylindric, erect ; 2 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 ji. erecta Dew. 

 Ed. 1st.) 



60 C. strictior Dew. <5 Spikes 1 — 2, with oblong and blackish, acutish glumes ; 

 2 spikes 2 — 3, cylindric, $ 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 oxute rusty glume ; st. a foot and more, 

 triquetrous and rough on tho angles, with reticulated filaments connecting th» 



