140 PROCEEDINGS OP THE AMERICAN ACADEMY 



250. Carex muricata, Linn. Sp. PI. 974. 



Introduced into old fields in Eastern Massachusetts, where it is 

 common ; also in Ohio according to Boott, Cincinnati, Lloyd, Kentucky 

 according to Boott, and Ocean View, Virginia, Ward. Europe. 



Var. Americana. 



C. muricata, Olney, Bot. King's Rep. 362, in part ; W. Boott, Bot. 

 Wheeler's Surv. 277 ; Bailey, Coulter's Man. 390. 



Perigynium smaller and more abruptly contracted above than in the 

 species, the scales mostly longer and the spikes commonly smaller : 

 heads usually brownish. — Colorado to New Mexico and Arizona ; 

 Santa Rita Mts., Arizona, Pringle. 



Var. GRACILIS, Boott, 111. 193. 



C. Hookeriana, Dewey, Sill. Journ. xxix. 248, f. 75. 



Colorado and Utah to California and Oregon, and northward into 

 British America. Perhaps specifically distinct, 



Var. CONFIX A, Bailey, Bot. Gaz, x. 203. 



C. Hoodii, W. Boott, Bot. Calif, ii. 232, in part. 



Very like Boott's figure of G. Hoodii. It also approaches forms of 

 C. cephaloidea. C. Hoodii^ as I understand the species, is charac- 

 terized by its much stouter culms, its much heavier, browner, and more 

 compact heads, which are made up of many-flowered, chaffy, linear or 

 ovate more or less pointed spikes, and more upright perigynia, which 

 are covered by the large scales. The brown and green and truncate 

 characters of the spikes of the var. conjixa are characteristic. — N. W. 

 Wyoming, Utah to California and Oregon, and northward into British 

 America. 



251. Carex sparganioides, Muhlenberg; Willd. Sp. PI. iv. 237. 

 G. cephnlophora, |S', Torr. Monogr. 389. 



G. sparganioides, var. minor, Boott, 111. 123. 

 G. muricata, var. cephaloidea, Dewey, Sill. Journ. xli. 330. 

 Throughout the Northern States east of the Mississippi. 



* * Plants stouter and the spikes aggregated. 



252. Carex Muhlenbergii, Scbkuhr, Riedgr. Nachtr. 12, f. 178. 

 G. pinetorum, Willd. ; Schlecht. in Linncea, x. 265. 



Readily distinguished by its stiflf' culm and nearly orbicular, narrowly 

 winged and strongly nerved perigynium. — Throughout the States east 

 of the Mississippi ; " on the Missouri below Ft. Pierre," Dewey. 



Var. ENERVis, Boott, 111. 124. 



Perigynium nerveless or very nearly so. — Fishkill Landing, High- 

 lands, N. Y., /. L. Russell; rocks near Wilmington, Delaware, Ganhy. 



