Oedeb 155.— CYPEEACE^. 759 



rarely all $ ; perig. oblong, triquetroua, oUuse, oblique at the orifice, slightly 2- 

 lobed, longer than the oblong, obtuse, and shori-awned gliime; st. often 2{, reddish 

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

 meadows. 



89 C. formdsa Dew. (B. 1. 130.) Spikes 3 — i, oblong, short and thick, distant, 

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

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

 than the ovate and acute glume ; st. 1— 21) 3-sided, dark brown towards the base, 

 yellowish bright green. — Common in wet meadows. 



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

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

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

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

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

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

 Housatonic in Mass. (Dewey). Sometimes nearly pubescent. 



91 C prgeoox Jacq. i Spike erect, subclavate; ? spikes 1 — 3, ovate, bracte- 

 ate, approximate, lower one 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 hiUs, Salem, Mass. (Pickering), 

 Ipswich, Mass. (Oakes). 



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

 darlc glumes, white on the edge and green on the keel; S spikes ], 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 ]?la. 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 ond, rostrate, short-bidentate, pubescent, equaling the ovate- 

 lanceolate glume ; st. J — 4', with veiy long leaves. 



;8. vioiNA Dew. 1 or 2 s spikes close to the $, sessile ; the other 9 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 Emraousii Dew. $ Spike sessile, short (3") ; s spikes 2 — 3, approximate, 

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

 triquetrous, attenuated at th^ase, 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. Noveaj-Anglese, /?. Carey.) 



95 C. Pennsylvanica Lam. 3 Spike erect, pedunculate, long (6 to 8"), sublri- 

 quetrous, with an obtuse glume ; 9 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 — 1 2', 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 different aspect 

 and its deep reddish-brown scales. 



96 C. Novae-Angliee Schw. i Spike short, slender, oblong; 9 spikes 2 — 3, 

 ovate, alternate, sessile, reraotish, few-flowered, bracteate ; perig. 3 — 6, ovaMri- 

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

 ate glume; st. 4 — 8', slender, subdecumbent, longer than the leaves. — Pale green. 

 Open woods in high grounds. (C. varia /3. minor Boott.) 



ji. COLLBOTA Dew. St. 10 — 16', very slendei,. erect; ? spikes 2—4, lowe- 

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

 High lands of Mass. ; not abundant. 



97 C. varia Muhl. i Spike erect, short or subehngaied ; 9 spikes 3, ovate, sessile, 

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

 acuminate-rostrate, bifid, scabro-pubesceut, abcmt equal to the ovate, acuminate 



