CATALOGUE. 371 



(rarely straw-color,) pale at base, twice as long as the acutely ovate dusty 

 scale, which is whitish at the apex and pale-nerved. — No ripe achenia seen. 

 This is C. Grahamii, Boott, and in my opinion quite distinct from C. saxatilis. 

 Rooky Mountains of British America, (Drummond.) Shore of a subalpine 

 lake in the Uintas, with C. elongata and other species ; 9,500 feet altitude ; 

 August. (1,248.) 



Carex aurea, Nutt. Canada to Wisconsin ; Arctic America ; in the 

 Rocky Mountains to California. Ruby Valley and East Humboldt Mountains, 

 Nevada; 6-9,000 feet altitude; July-September. (1,249.) 



Var. ANDROGYNA, Olney. Culms short, more rigid ; leaves erect, broader; 

 upper spikes more closely aggregated and denser flowered, the upper spike 

 generally androgynous, having more or less fertile flowers at the top. — Penn- 

 sylvania, Presque Isle, (A. P. Garber ;) Lake Superior, North Mine, (Agassiz,) 

 Thunder. Bay, (J. Macoun ;) Rocky Mountains of British America, (Drum- 

 mond, in Herb. Torr. ;) Colorado, Dudley's Ranch, (E. L. Greene.) Uintas ; 

 8,000 feet altitude ; July. (1,250.) 



Carex Magellanica, Lam. (C. irrigua, Sm., Grai/s Man.) New 

 England, New York, Pennsylvania, and Wisconsin. On the margin of a sub- 

 alpine lake in the Uintas, with C. elongata and other species ; 9,500 feet 

 altitude; August. (1,251.) 



Caeex atrata, L. Mountains of California and Colorado, (Hall & 

 Harbour, 597 Vasey.) Uintas, near head of Bear River; 10,000 feet alti- 

 tude; August; also found in the Uintas by Hayden, 1870. (1,252.) 



Var. NIGRA, Boott. Collected in Colorado by Hall & Harbour, Vasey, 

 (596,) and E. L. Greene — by the latter in a deep swamp, at 8,000 feet 

 altitude. Moist rocky ridges in the East Humboldt Mountains, Nevada, and 

 in the Uintas ; 9-11,000 feet altitude ; August. (1,253.) 



Carex Buxbaumii, Wahl. From New England and Wisconsin to Arctic 

 America, southward along the Alleghanies, and in the western mountains to 

 Colorado, Texas, (Wright,) and California. On a subalpine lake in the 

 Uintas, with C. elongata, &c.; 9,500 feet altitude; August. (1,254-) 



Carex frigida. All. Spike elongated, rusty-black, composed of 4-8 

 oblong spikelcts, the terminal one staminate and remainder pistillate, the 

 upper contiguous and sessile, the lower remote and exsertly pedunculate ; 

 bracts sheathing, shorter than the culm ; stigmas 3 ; perigynium triangular, 

 lanceolate, tapering to a beak, bifid at the orifice, nerved, smooth, hispid on 



