ORDER 155. CYPERACEJE. 759 



rarely all <; perig. oblong, triquetrous, obtuse, oblique at the orifice, slightly 2- 

 lobed, longer than the oblong, obtuse, and short-owned glume; st. often 2fj reddish 

 towards the base, leafy and subprocumbent, pale green. Common in damp 

 meadows. 



89 C. formosa Dew. (B. 1. 130.) Spikes 3 4, oblong, short and thick, distant, 

 1-sided, on a long and slender peduncle, recurved ; perig. oblong, triquetrous, sub- 

 inflated, acutish at either end, nearly entire or 2-lobed at the orifice, twice longer 

 than the ovate and acute glume ; st. 1 2f, 3-sided, dark brown towards the base, 

 yellowish bright green.- Common in wet meadows. 



90 C. Davfsii Torr. (B. t. 132.) Spikes 4, oblong, cylindric, subsparsely flow- 

 ered, remote, pedicellate, pendulous in maturity; perig. oblong-conic, fcubinflated, 

 subtriquetrous, nerved, acutish, short-rostrate, 2-lobed at the orifice, glabrous to- 

 wards maturity, about equaling the oblong, scabrous-awned glume; st. 1 2f, trique- 

 trous, scabrous above, with leaves equaling it; Ivs. and sheaths pubescent, some- 

 times but very little, light green. First found on the alluvial meadows of the 

 Housatonic hi Mass. (Dewey). Sometimes nearly pubescent 



91 C. prascox Jacq. $ Spike erect, subclavate; $ spikes 1 3, ovate, bracte- 

 ate, approximate, lower ono short-pedunculate; perig. 6 12, ovate and subglo- 

 bous, triquetrous, pubescent, short-rostrate, equal to the ovate, acute, or mucron- 

 ate glume ; cm. 2 6', leafy at the base. On rocky hills, Salem, Mass. (Pickering), 

 Ipswich, Mass. (Oakes). 



92 C. nigro-marginata Schw. $ Spike erect, short-cylindric, with oblong, obtuse, 

 dark glumes, white on the edge and green on the keel; 9 spikes 1, 2, rarely -3, ovate, 

 4 to 6-flowered, the lowest squarrous-bracted, near the $ , on one long, scabrous 

 stem or ped. (6 to 8' long), 2 or 3 short (2 to 4'), and radical ped. all on the same 

 root ; perig. ovate or oblong, tapering below or pediceled, slender-beaked, rough- 

 ish, about equaling the ovate or lance-oblong, dark glume, which is white on the 

 edge and keel; Ivs. radical, scabrous, recurved, bright green, longer than the culm. 

 Dry hills, Penn. to Fla. and La. 



93 C. timbellata Schk. Dwarf; $ spike short, erect ; 5 spikes several, each on 

 its low, radical peduncle, ovate, subumbellate, green; perig. ovate or globous, 5 8, 



acutish at either end, rostrate, short-bid entate, pubescent, equaling the ovate- 

 lanceolate glume ; st. \ 4', with very long leaves. 



(3. VTCINA Dew. 1 or 2 ? spikes close to the $ , sessile ; the other ? spikes 

 on their own stems or radical peduncles. In small tufts on dry hills. Both 

 varieties grow on the same root, but Schk. saw and figured only the first. 



94 C. Emmonsii Dew. $ Spike sessile, short (3") ; $ spikes 2 3, approximate, 

 sessile, few-flowered, very slwrt, often one long, radical peduncle ; perig. globous- 

 triquetrous, attenuated at the base, rostrate, pubescent, at the orifice oblique, about 

 equal to the ovate glume ; culm filiform, decumbent, 6 10', leafy at the base, pale 

 ash-green. On dry fields and hills : common. (C. XoveaB- Angles, ft. Carey.) 



95 C. Pennsylvanica Lam. $ Spike erect, pedunculate, long. (6 to 8"), subtri- 

 quetrous, with an obtuse glume ; $ spikes 1 3, ovate, subsessile, subapproximate, 

 few-flowered; perig. ovate-globous, tomentous, short rostrate, slightly 2 -toothed, 

 about equal to the ovate-acuminate, or oblong-acuminate, deep reddish glume ; st 

 4 12', erect, stiff, with short culm-lvs., and often with long, stiSj root-lvs. (when 

 it is C. emarginata, as hi Schk., fig. 143). Open woods and hedges, common 

 much resembles the preceding, but readily distinguished by its <p3erent aspect 

 and its deep reddish-brown scales. 



96 C. Novae- Angliae Schw. $ Spike short, slender, oblong; $ spikes 2 3, 

 ovate, alternate, sessile, remotish, few-flowered, bracteate ; perig. 36, oval-tri- 

 quetrous, rostrate, costate, slightly pubescent, .a little longer than the ovate, mucron- 

 ate glume; st. 48', slender, subdecumbent, longer than the leaves. Pale green. 

 Open woods in high grounds. (C. varia /?. minor Boott.) 



p. COLLECTS Dew. St. 10 16', very slender, erect; ? spikes 2 4, lower 

 short-pedunculate; perig. more tapering into a beak, slightly bidentate. 

 High lands of Mass. ; not abundant. 



97 C. varia Muhl. $ Spike erect, short or subelongaled ; $ spikes 3. ovate, sessile, 

 rather near, bracteate, few-flowered ; perig. ovate or sub-globous, subtriquetrous, 

 acuminate-rostrate, bifid, scabro-pubescent, about equal to the ovate, acuminate 



