Carex. CLX. CYPERACEiE. 591 



ovate-lauceolate, acuminate, short-bidentate, ciliate glume ; st. 1 — 2f high, 

 acutely triquetrous, rough above, longer than the leaves towards the base. — 

 Bright green. Along brooks and streams ; common. 



121. C. Crawei. Dew. 



9 Spikes 3 — 6, cylindric, short and thick, densely flowered, sometimes 

 aggregated, sometimes remote, the lowest often subradical and long-peduncu- 

 late ; peris;, ovate, terete, scarcely rostrate, diverging, entire at the orifice, twice 

 longer than the ovate and obtusish glume; J* spike with one or two small ones 

 at its base. 

 • 12-2. C. poLYMORPHA. Muhl. 



^ d^ Spikes long cylindric, upper one pedunculate, with oblong and ovate 



% scales ; 9 spikes 2, oblong, cylindric, close-fruited, erect, nearly sessile, upper 

 one staminate at the apex, with nearly enclosed pedimcles ; perig. ovate, acu- 

 minate, bilobate, scarcely rostrate, striate, longer than the ovate glume. — N. J. 

 J" and the Southern States. Differs from D. Halseyana in its ^f spikes and obtuse 

 ^5^ glume, in its acuminate, not rostrate fruit, and its larger, fertile spikes. 

 X H. Staminate spikes usually two or more. 



'^ — 123. C. ScHWENiTzii. Dew. 



^ Spikes 2, rarely 1, upper long and slender, l-ower with a few perigynia 



at the base ; 9 spikes 2—4, oblong, cylindric, subapproximate, subrecurved, 



'-> subloose-flowered, lowest often long-pedunculate; perig. ovate-oblong, tapering 



"^i^ above, rostrate, inflated, nerved, glabrous, bifurcate, longer than the lanceolate, 



C subulate, subsetaceous glume; sL 6—12' high, scabrous above, very leafy.— 



"*^ Pale yellowish-green. Wet sandy grotinds. Not abundant. 



124. C. RETRORSA. Schw. 



(^ Spikes about 3, rarely 1, often with a few perigynia at the base; 9 

 spikes 4—6, oblong-cylindric, approximate, dense-flowered, with long and leaty 

 ^^. bracts, the lowest often remote and long-pedunculate ; perig. ovate-inflated, sub- 

 ^ globose, rostrate, bifurcate, nerved, reflexed, twice longer than the lanceolate 

 glume; st. 15—30' high, scabrous above, large, stiff" and leafy.— Bright green. 

 -< In clusters, about pools of water, common. The lower spikes sometimes have 

 , t 1 or 2 smaller spikes attached to them. 



125. C. ARisTATA. R. Br. 



9 Spikes 2 — 4, cylindric, distant, close-flowered, erect; perig. ovate, 



oblong, nerved, deeply bifid, very glabrous, long-rostrate, longer than the 



<:•' oblong, awned glume ; Ivs. and sheatks villose on the under side ; st. a toot or 



vv more high.— Bright green. Watertown, N. Y., Torr. <^ Gray. Is not this 



i^o very closely related to the following species^ 



126. C. TRicHoCARPA. Muhl. 



^ Spikes about 3, erect, rarely 1, or 9 above, cylindric, Imver shorter; 9 

 spikes 2—4, erect, long-cyiindric, smoothish, rather loose-flowered ; perig. ovate, 

 conic, inflated, nerved, rostrate, bifurcate, denselv pubescent, about twice lon- 

 ger than the ovate-lanceolate glume; st. 15—30' high, scabrous above, and 

 with pubescent leaves and sheaths.— Light green. In wet and marshy places ; 

 £ common. 

 '^ /?. turbinata. Dew. 9 Spikes ovate, or short-oblong, thick, remote, dense- 

 flowered; perig. subdiverging, ovate and conic, rostrate, longer than the ovate- 

 oblong, mucronate glume ; st. 2— 3f high.— Glaucous green. In a pond m 

 Beckmau, N. Y., there abundant. 



127. C. LONGiROSTRis. Tom 



(^ Spikes 3, short; o spikes 2—3, cvlindric, quite loose-flowered, pendu- 

 lous, subdistant, with fifiform peduncles ; peris, ovate, globose, inflated, gla- 

 brous, long-rostrate, hispid, a little longer than the lanceolate or ovate, cuspi- 

 date glume ; St. 15—30' hii,'h, rather slender, stiff", leafy below.— Bright green. 

 On light soil of hedges in N. England and N. York. Common. 



128. C. LANUGINOSA. Michx. (C. pellita. Muhl.) 



^ Spikes 2, oblong, slender, erect ; 9 spikes 2—3, cylindric, erect, dense- 

 flowered, sometimes short-oblong, and thick, subrostrate ; perig. ovate, short- 

 rostrate, bicuspitate, subtriquetrous, thick, pubescent and woolly, about equaling 

 50* 



