OBDER 155. CYPERACE^E. 759 



rarely all $ ; perig. oblong, triquetrous, obtuse, oblique r.t the orifice, slightly 2- 

 lobed, longer than the oblong, obtuse, and short-awned glume ; st. often 2f, 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 bro\vn towards the base, 

 yellowish bright green. Common in wet meadows. 



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

 ered, remote, pedicellate, pendulous iu maturity; perig. oblong-conic, &ubinflated, 

 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 in Mass. (Dewey). Sometimes nearly pubescent. 



91 C. praecox Jacq. S Spike erect, subclavate; 5 spikes 1 3, ovate, bracte- 

 ate, approximate, lower one short-pedunculate; perig. G 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 ; $ spikes 1 , 2, rarely 3, ovate, 

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

 stem or pod. (G 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. umbellata Schk. Dwarf; $ spike short, erect ; ? spikes several, each on 

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

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

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



ft. VICINA Dew. 1 or 2 $ spikes close to the J , sessile ; the other 5 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. Emmousii Dew. $ Spike sessile, short (3") ; $ spikes 2 3, approximate, 

 sessile, few-flowered, very short, often one long, radical peduncle ; perig. globotis- 

 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. Noveas-Angleae, ft. Carey.) 



95 C. Pennsylvanica Lam. $ Spike erect, p?duncu'late, long (G to 8"), subtri- 

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

 lew-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, stiff, root-lvs. (when 

 it is C. marginata, as in Schk., fig. 143). Open woods and hedges, common 

 much resembles the preceding, but readily distinguished by its differeiit aspect 

 and its deep reddish-brown scales. 



96 C. Novce-Angliae Schw. i Spike short, slender, oblong; $ spikes 23, 

 ovate, alternate, sessile, remotish, few-flowered, bracteate ; ptrig. 3 6, oval-tri- 

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

 a(e glume; st. 4 8', slender, subdecumbent, longer than the leaves. Pale green. 

 Open woods in high grounds. (C. varia j3. minor Boott.) 



il. COLLECTA Dew. St. 10 1C', very slendei, erect; $ spikes 2 4, IOWP- 

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

 High lands of Mass. ; not abundant. 



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

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

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



