278 BOTAFY. 



Carex decidua, Boott. — Willow Spring, Arizona, at 7,195 feet eleva- 

 tion (233), Eothrock. 



Carex Buxbaumii, Wahl. — Twin Lakes, Colorado (1042). 



Carex atrata, L. — South Park (1046). Var. nigra (C. nigra, All.) — 

 Oro City, Colorado (1047). Var. ovata (C. ovata, Rudge.) — South Park 

 (1050, 1051). Var. from Mount Graham, Arizona, at 9,000 feet (431), 

 with cylindrical spikes on elongated weak peduncles. 



Carex alpina, Sw.— South Park, Wolf (1043). 



Carex Parryana, Dew. — Smoothish, 4-18' high; leaves £' wide, with 

 revolute margins, tapering to a long slender point, shorter than the culm ; 

 spikes oblong or cylindrical, either single, dioecious, or 1-4, the uppermost 

 much the largest, about 1' long, male, or female with scattered male flowers, 

 the others female; bracts 1—2, slender, the lowest shorter than the culm, 

 with connate purple auricles forming a short (1^2" long) sheath ; perigynia 

 triquetrous, broadly ovate or obovate, emarginate, serrate-ciliate on the 

 margins above, about the length of the broadly ovate, obtuse, mucronate, 

 purple scales with hyaline margins; nerves 2, marginal; stigmas 3; achene 

 obovate, triquetrous. — South Park (1040, 1041). 



Carex aurea, Nutt. — Twin Lakes, Colorado (1052-1057). Willow 

 Spring, Arizona, at 7,195 feet (215) ; a tall form, with short bracts. 



Carex Rossii, Boott. — Twin Lakes (1058). 



Carex capillaris, L. — South Park (1059). Var. elongata, Torr., 

 Twin Lakes (1060). 



Carex lanuginosa, Mx. — Twin Lakes (1061, 1062). Willow Spring, 

 Arizona, at 7,195 feet (241). 



Carex aristata, R. Br. — A single specimen without number or ticket. 



Carex sp.? (1064), Colorado. Too young to determine. 



Carex utriculata, Boott. — Twin Lakes, Colorado (1069) (1068, 

 with more globular fruit, resembling C. ampullacea, Good., common in the 

 Eastern States). Var. globosa, Olney, Sierra Blanca, Arizona (806). 



Carex vesicaria, L., var. alpigena, Fries. (C. saxatilis, L.; C. pulla, 

 Good.; O. Grahamii, Boott.) — 6-24' high, sharply angled, rough above; 

 leaves 2" wide, shorter than the culm, tapering to a long, triquetrous apex ; 

 male spikes 1-2, about 1' long, female 1-3' long, 3" wide, oblong or cylin- 



