Order 155.— CYPERACE^E. ?5D 



rarely all <£ ; perig. oblong, triquetrous, obtuse, obliquo at tho orifice, slightly 2- 

 lobod, longer than the oblong, obtuse, and short-awncd glume; st. olten 2f, reddish 

 towards tho base, leafy and subprocumbent, palo greeu. — Common in damp 

 meadows. 



89 C formosa Bow. (B. t. 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 cither end, nearly entiro or 2-lobed at tho orifice, twice longer 

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

 yellowish bright green. — Common in wet meadows. 



90 C. Davisii Torr. (13. t. 132.) Spikes 4, oblong, cylindrie, subsparsely flow- 

 er >d, remote, pedicellate, pendulous in maturity; perig. oblong-conic, subinflated, 

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

 wards maturity, about equaling t/te oblong, scabrous-owned glume; st. 1 — 2f, trique- 

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

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

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



91 C. precox Jacq. t Spike erect, subclavato; $ spikes 1 — 3, ovate, braeto- 

 ato, approximate, lower one short-pedunculate; perig. C — 12, ovato and tubglo- 

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

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

 Ipswich, Mass. (Oakes). 



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

 dark glumes, while 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 ped. (6 to 8' long), 2 or 3 short (2 to 4'), and radical ped. all on the samo 

 root; perig. ovato or oblong, tapering below or pediccled, slender-beaked, rough - 

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

 edge and keel; lvs. radical, scabrous, recurved, bright green, longer than tho culm. 

 — Dry hills, Penn. to Fla. and La. 



93 C. umbellata Schk. Dwarf; $ spike short, erect ; ? spikes several, eacJi on 

 its low, radical peduncle, ovate, subumbcllate, green; perig. ovate or globous, 5 — 3, 

 acutish at either end, rostrate, short-bidentate, pubescent, equaling tho ovate- 

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



/?. TICINA Dew. l'or 2 5 spikes closo to tho £, sessile; the other § spikes 

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

 varieties grow ou tho same root, but Schk. saw and figured only tho first. 



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

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

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

 equal to the ovate glume; culm fililbrm, decumbent, G — 10', leafy at the base, palo 

 ash-green. — On dry fields and hills ; common. (C. Kbveaj-Anglcaj, j3. Carey.) 



95 C. Peaasylvanica Lam. S Spike erect, pedunculate, long (G to 8"), subtri- 

 quetrous, with an obtuse glume; 9 spikes 1 — 3, ovate, subsessile, subapproximate, 

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

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

 4 — 12', erect, stiff, with short culm-lvs., and ofteu with long, stiff, root-Ivs. (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. Novas- Anglic© Schw. Z Spike short, slender, oblong; 5 spikes 2—3, 

 ovate, alternate, sessile, reinotish, few-flowered, bracteate ; perig. 3 — 6, oval-tri- 

 quetrous, rostrate, costate, slightly pubescent, a UtUe longer than the ovale, mucron- 

 dte glume; st. 4 — 8', slender, subdecumbent, longer than tho leaves. — Pale green- 

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



p. collecta Dew. St. 10—16', very slender, erect; 2 spikes 2—4, lowe" 

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

 High lands of Mass. : not abundant. 



97 C. varia Muhl. £ Spike erect, shorter subelongatcd; ? spikes 3. ovate, sessile, 

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

 acuminate-rostrate, bifid, scabro-pubescont, about equal to the ovate, acuminata 



