Carex. CLX. CYPERACE^. 591 



ovate-lanceolate, acuminate, shoi't-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 ; perig. 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. 



122. C. POLYMORPHA. Muhl. 



(J' Spikes long cylindric, upper one pedunculate, with oblong and ovate 

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

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

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

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

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



H. Stamifiate spikes usually two 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, subapproximate, subrecurved, 

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

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

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

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



124. C. RETRORSA. Schw. 



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

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

 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 loM'er 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 ; st. a foot or 

 more high. — Bright green. Watertown, N. Y., Torr. (^ 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, lower 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 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 in 

 Beckman, N. Y., there abundant. 



127. C. LONGiROsTRis. Torr. 



g" Sjnkes 3, short ; 9 spikes 2 — 3, cylindric, quite loose-flowered, pendu- 

 lous, subdistant, with filiform peduncles ; perig. 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. MuM.) 



(^ 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* 



