Carex. CLX. CYPERACE^. 591 



ovate-lanceolate, acuminate, short-bidentatc, ciliate glume ; s(. 1 — 2f high, 

 acutely triquetrous, rough above, lonj^n-r than the leaves towards the base. — 

 Bright green. Along brooks and streams; common. 



121. C. Ckawei. Dew. 



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

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

 late; pcrig. ovate, terete, scarcely rostrate, diverging, entire at tlie orihce, twice 

 longer than the ovate and obtusi'sh glume; cf spike with one or two small ones 

 at its base. 



122. C. POLYMORPiiA. Muhl. 



J* Spikes long cylindric, upner one pedunculate, with oblong and ovate 

 scales; 9 spikes 2, oblong, cylindric, closc-lruiled, erect, nearly sessile, upper 

 one staminate at the apex, with nearly enclosed peduncles ; ;;e/i/r. ovate, acu- 

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

 and the Southern States. Differs trom D. Halseyana in its (^ spikes and obtuse 

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



H. Slaminate spikes usually ttvo or more. 



123. C. ScHWENiTzii. Dew. 



(^ Spikes 2, rarely 1, upper long and slender, lower with a few perigynia 

 at the base ; 9 spikes 2 — 4, oblong, cylindric, subappro.ximate, subrecurved, 

 subloose-flowered, lowest often long-pedunculate ; pcrig. ovate-oblong, tapering 

 above, rostrate, inflated, nerved, glabrous, bifurcate, longer than the lanceolate, 

 subulate, subsetaceous glume; si. G — 12' high, scabrous above, very leafy. — ^ 

 Pale yellowish-green. Wet sandy grounds. Not abundant. 



124. C. RETRORSA. Schw. 



cf ,S'/^//rcs about 3, rarely 1, often with a few perigynia at the base ; 9 

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

 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 

 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 sheaths villose on the under side ; 5^. a foot or 

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

 very closely related to the following species 1 



126. C. TRicHocARPA. Muhl. 



(^ Spikes about 3, erect, rarely 1, or 9 above, cylindric, lou-er shorter; 9 

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

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

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

 with pubescent leaves and sheatlis. — 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 in 

 Beckman, N. Y., there abundant. 



127. C. LONGiRosTRis. Torr. 



(^ Spikes 3, short; 9 spikes 2 — 3, cylindric, quite loose-flowered, pendu- 

 lous, subdistant, with filiform peduncles ; pcrig. ovate, globose, inflated, gla- 

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

 date glume ; St. 15—30' high, 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.) 



(j^ Sp^ikes 2, oblong, slender, erect ; 9 spikes 2 — 3, cylindric, erect, dense- 

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

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



