OF ARTS AND SCIENCES. 133 



and aclienium lenticular. — The spikes, especially the uppermost, 

 usually have contracted bases when the starainate flowers are borne 

 below the pistillate ones, and empty scales at the top when the 

 staminate flowers are borne above. 



Section XIII. ACR0ARRHENJ5, Fries, Summa, 73. Stami- 

 nate flowers borne at the top of the spikes (or, in the Multifior(z and 

 Arcnarlce, spikes often wholly staminate and the plants occasionally 

 dioecious). 



A. FoRtidcB, Tuckerman, Enum. Meth. 10. (Curvules, Tuckm. 1. c. in part. 



C/wrdorliizece, Fries, Sunmia, 73.) Spikes tawny or brown, not elongated, 

 very densely aggregated into a continuous globose somewhat cliafFy bead ; 

 peritryniura ovate or ovate-lanceolate, nerveless or nearly so, mostly thin in 

 texture. 



225. Carex incurva, Lightfoot, Fl. Scot. 544, t. 24, f. 1. 

 C.juncifoUa, All. Fl. Fed. ii. 264, t. 92, f. 4. 



C. psammogcea, Steud. Plant. Cyper. 187. 

 Colorado, Gray's Peak, Patleison, alpine ridge near Middle Park, 

 Parry ; Rocky Mts. of British America, Drurmnond, and northward 

 to Kamtschatka, Wright, and Greeidand, Vahl. Europe. 



226. Carex chordorhiza, Ehrhart, Phyt. no. 77. 

 C. fulvicoma, Dewey, Sill. Journ. xxix. 249. 



Cold boos from Vermont to Illinois and Iowa, and northward to 

 Hudson's Bay. Not common. Europe. 



227. Carex fcetida, Allioni, Fl. Fed. ii. 265. 



Mountains of Colorado, Wyoming, and Utah, and in California, 

 Brewer 2066 and 2304, Summit Camp, Dr. Kellogg. 



228. Carex stenophylla, Wahl. Kongl. Acad. Handl. xxiv. 142. 

 C jvnci folia., Schkuhr, Riedgr. 26, f. 32. 



C. duriuscula, C. A. Meyer, Cyp. Nov. 214, t. 8. 

 G. pachystylis, Gay, Ann. Sci. Nat. x. 301. 

 C. Deinbolliana, Gay, Ann. Sci. Nat. xi. 183. 

 Emmet Co., Iowa, Cratfy, to Colorado and northward to the Sas- 

 katchewan. 



229. Carex Hoodii, Boott, Hook. Fl. Bor.-Am. ii. 211, t. 211. 



A dubious species founded upon immature specimens from the 

 Columbia, collected by Scolder. Subsequent specimens collected in 

 California have been referred to it, but they belong to G. Brongniartii, 

 var. densa, and G. muricata, var. confixa., which see for further notes 

 on G. Hoodii. It is probable that Scouler's plant is G. muricata, var. 



