154 TWELFTH ANNUAL REPORT. 



0. marcida, Boott.* Sedge. 



Red river (open prairie swamp), Dawson, Macoun. West. 



C. ceplialoidea , Boott. Sedge. 



Througliout the state, excepting perhaps northeastward. Frequent in Martin 

 county, and in Emmet county, Iowa, Cratty; swamps, "northwest angle" of lake ol the 

 Woods, 31acoim. 



C. ceplialopliora, Muhl. Sedge. 



Common, or frequent, through the south part of the state. Blue Earth county, 



Lcibei-g. 



0. Miililenbergii, Schk. Sedge. 



Lapham. Chaska, Carver county, Juni. Rare. South. 



C. rosea, Schk. Sedge. 



Common, or frequent, throughout the state. Red river (swamp), Dawsmi, Macoun; 

 Minneapolis, Juni, Kassiibe; Blue Earth county, Leiberg; Hesper, Iowa (frequent), Mrs. 

 Carter; Martin county, and Emmet county, Iowa (common), Cratty. 



C. chordorhiza, Ehrh. Sedge. 



Throughout the state, but infrequent. [North of lake Superior (at Fort William), 

 Macoim; Emmet county, Iowa, Arthur.] 



C tenella, Schk. Sedge. 



Throughout the state, excepting far southward. Minneapolis, Juni, Kassube. 



C trisperma, Dew. Sedge. 



Range like the last. Put in bay, lake Superior, Juni. 



C. tenuiflora, Wahl. Sedge. 



Range like the two preceding. Minneapolis, Juni, Herrick. 



C. canescens, L. Sedge. 



Throughout the state : common northward, less frequent southward. Blue Earth 

 county, Leiberg. 



C. canescens, L., var. alpicola, Wahl. (var. vitilis. Carey.) Sedge. 

 Agate bay, lake Superior, Juni. North. 



C. arcta, Boott.f Sedge. 



Lake Superior, Rainy lake, and lake of the Woods, Richardson, Boott. North. 



*Carex makcida, Boott. Spike oblong, pale, composed of numerous small ovate 

 aggregated androgynous spikelets, staminate at top, the lower spikelets compound ; 

 stigmas 2 ; perigynium tawny, suborbicular, or ovate taperiiig to a bifid beak, plano- 

 convex, nerved, winged, the upper margins serrated, short-stipitate, nearly equal to the 

 acute ovate scale, which is of a pale straw-color, with a while membranous margin; 

 achenium tawny, lenticular, contracted at base. Culm 1 to 2 feet high, rigid ; leaves 

 broad, linear, erect. Olney in Bot. Rep. of King's Expl, of the Fortieth Parallel. 



tCAKEX ARCTA, Boott. Spike oblong, capitate, pale, of 8 to 14 spikelets, which are 

 oblong and obtuse, androgynous, at the base sparingly staminate, many-flowered, 

 closely crowded, the lower bracteate ; bracts bristle-shaped, dilated at the base, longer 

 than the spikelets ; stigmas 2 : perlgynia ovate, acuminate-beaked, with the minute 

 orifice emarginate and deeply cleft on the outer side, serrate above on the sharp mar- 

 gins, on the outer side slightly nerved, on the inner more sparingly or obsoletely nerved, 

 spreading, pale-green, at length becoming rusty above, membranaceous, at the base 

 thickly spongy ; longer than (and as broad as) the scale, which is ovate, acute and 

 mucronulate, whitish or rusty-colored, with a greenish margin and a green mid-nerve. 

 . . . Culm somewhat less than a foot high, sharply triangular, rather stout, upwardly 

 roughish, leaved at the base. Leaves i to lu lines wide, flat, with a prolonged-tapering 

 tip, longer (often much) than the culm. Bracts at their base broadly dilated, bristle- 



