(SEDGE FAMILY.) 521 



60. C. pailicea, L. Fertile, spikes 1-3, commonly 2, ocoid, oblong, or cylin 

 drical, closilc/ Jloirered, remote; pcrig/jnia when young oblong, and contracted at each 

 end, at maturity roundiah-obovoid, scarcely inflated, with more obscure nerves, and 

 a slightly-bent point, longer than the ovate pointed or awnod scale ; achenium 

 triquetrous, flattened at the top, contracted towards the base, distinctly dotted under 

 a lens. (C. Meadii, Dew.) Wet meadows and margins of streams, New Eng- 

 land to Wisconsin, and south westward. Very variable in the length and thick- 

 ness of the fertile spikes, the slender forms approaching closely to the next; in 

 both, the shape of the fruit varies greatly with age. (Ku.) 



61. C. tctiillica, Sc.hk. fertile, spikes 1-3, commonly 2, oblong-cylindrical, 

 loosely flowered, remote ; perigynia ichen young pointed at each end, at maturity obo- 

 void, scarcely inflated, with a slightly bent point, longer than the ovate pointed or 

 awned scale; achenium ovoid-triquetrous, indistinctly dotted under a lens. (C. co- 

 noidea, Gray, Gram. $* Cyp., not of Schk. C. Woodii, Detv.) Margins of 

 lakes and rivers, N. 'New York to Michigan, and southward. 



62. C. Cr&wei, Dew. Sterile spike usually solitary, or with 1 (rarely 2) 

 short additional ones at its base, the principal sometimes fertile at the apex; 

 fertile spikes 3-6, remote, and the lotcesl. near the root, oblong or cylindrical, densely 

 flowered, and sometimes slightly compound at the base ; perigynia ovoid-oblong, 

 obscurely nerved, with a short slightly bent point, longer than the rather obtuse 

 scale. (C. heterostachya, Torr.) Clefts of rocks, Jefferson County, New York 

 (Cmwe}, shore of Lake Ontario (Vasey), and N. Michigan (Bull). A very 

 variable species, rigidly erect, 4'- 12' high, in some of its forms much resembling 

 the next ; but the perigynium is less round and with fewer and more indistinct 

 nerves, the bracts do not exceed the culm, and the starninate spike is long- 

 pcduncled. 



63. C. grmililsVriS, Muhl. Sterile spike sessile, or short-stalked, occa- 

 sionally bearing a few fertile flowers ; pistillate spikes 3-4, cylindrical, densely 

 flowered, the lowest sometimes very remote, or near the root ; perigynia roundish- 

 ovoid, prominently nerved, with a minute slightly bent point, longer than the acute 

 scale ; bracts long, exceeding the culm. Wet meadows ; very common. 



64. C. Torre yi, Tuckerman. Sterile spike short-stalked ; fertile spikes 2- 

 3, ovoid, closely approximate, all on included stalks ; perigynia roundish-obovoid, 

 obtuse, with conspicuous elevated nerves, and a distinct abrupt point, longer than the 

 ovate pointed scale; culm, leaves, and short bracts downy. (C. abbreviate, Schiv. 

 mss. Sf Boott.) Bethlehem, Pennsylvania, Schweinitz ; and high northward. 

 Probably often overlooked From its close external resemblance to the next, but 

 it is very distinct. 



* * Staminate spike sessile, or short-stalked (except in No. 66) : pistillate spikes 

 2-5, erect, all on more or less exserted stalks : bracts longer than the culm (ex- 

 cept in No. 60) : perigynia very obtuse, with an abrupt and minute (or almost 

 obsolete) point, green and somewhat pellucid at maturity: pistillate scales tawny, 

 fading to white. PALLESCENTES. 



65. C. ]KllleSCenS, L. Fertile spikes 2-3, ovoid, densely flowered, approx- 

 imate ; perigynia iboi'oid-oblong, obscurely nerved, about the length of the scale. 

 Var. UNDUIXTA has the lower bract indented at the base with transverse waved 



44* 



