234 CTPERACEAE 



Locs. — Kaweah Peaks. Dudley 2114; Harrison Pass, Jepson 5039; Mt. Daua, Bolander 

 5072; Sonora Peak, A. L. Grant 522 (in part); Lake LueiUe, Eall 4- Oliandler 4663; White 

 Mts., Jepson 7395. 



Refs. — Carex helleri Mackenzie, Erj'thea 8:70, fig. 38 (1922), type loc. Mt. Rose, Washoe 

 Co., Nev., Eeller 9975. C. atrata L. va'r. nigra W. Boott in Bot. Gal. 2:239 (1880), not F. 

 Boott. 



96. C. epapillosa ^Mackenzie. Culms 1.5 to 6 dm. high, stiff, sliarply tri- 

 angular, smooth; leaf-blades 3 to 8 mm. wide; spikes 3 to 6, approximate or a 

 little separate, sessile or short-peduneled, oblong-ovoid, 1 to 2.5 cm. long, closely 

 flowered; scales lance-ovate, shar]:)-pointed, narrower than but about equaling 

 or exceeding perig^^na; perigynia broadly oval or obovate, obscurel.v nerved. 



Mountain meadows, high Sierra Nevada of Tuolumne Co. (Sonora Peak, 

 A. L. Clrant 394, 413). Easterly to Wyoming. 



Bef. — Carex epapillosa Mackenzie in Rj-db. Fl. Boeky Mts. 138 (1917), type loc. Marys- 

 vale, Utah, Jones 5345. 



97. C. heteroneura W. Boott. Culms 2.5 to 10 diu. high, slender, smooth 

 or nearl}^ so; leaf-blades«2 to 4 mm. wide; spikes 3 to 6, approximate or lower 

 more or less strongly separate, sessile (the upper) to strongly peduncled (the 

 lower), oblong, 0.7 to 2.5 cm. long, closely flowered with 15 to 40 appressed- 

 a.scending perigynia; scales acute, narrower than perigynia; perigynia sub- 

 orbicular, strongly flattened, rounded at base and apex, the beak 0.25 mm. long, 

 minutely liidentate. 



High montane. 7000 to 11,000 ft.: coastal Southern California; White Mts.; 

 Sierra Nevada from Tulare Co. to Nevada Co. East to western Nevada. 



Locs. — Southern California : San Jacinto Mts., Hassc; Mt. San Gorgonio, Geo. B. Grant 

 6404. Wliite Mts., Jepson 7345. Sierra Nevada: Lone Pine, M. E. Jones; Mt. Whitney, 

 Jepson 5053; npper San Joaquin River, Congdon; Yosemite, Congdon: Tuolumne Mdvvs., Jep- 

 son 4475; Calaveras Big Trees, BiUehrand' IZQl ; Sonora Pass, A. L. Grant 142, 277, 297; 

 Silver Valley, Alpine Co., Breteer 1967; Dormer Pass, Torrey 549. 



Refs. — Carex heteroneura W. Boott in Bot. Cal. 2:239 (1880), type loe. Lake Talioe to 

 Bear Valley, Kellogg; Mackenzie, Ervthea 8:71, fig. 39 (1922). C. atrata W. Boott I.e. not L. 

 C. atrata L. var. crecta W. Boott l.c"; Kiik. in Engler, Pflzr. 4"°: 399 (1909), type from Cal., 

 but not otherwise given. C. ejiuidrifida Bailey, Proe. Cal. Ac^d. ser. 2, 3:104 (1891), type loo. 

 Mt. Dana, Bolander 5046, and var. leni-s Bailey, I.e. 3:105 (1891), also based on Bolander 

 5046. C. quadrifidii Bailey var. eaeca Bailey, Bot. Gaz. 21:8 (1896), type from Tahquitz 

 Valley, San Jaciuto Mts., Basse. C. atrata L. subsp. atratiformis Brit. f. caeca Kiik. l.c. 400. 



98. C. albo-nigra Mackenzie. Culms 1 to 3 dm. high; leaf-blades 2.5 to 

 5 mm. wide; spikes u.sually 3, closely approximate, sessile or very nearly so, 

 linear-oblong, about 1 cm. long, closely flowered with 15 to 20 appressed- 

 ascending perigjaiia; scales ovate, acutish, purplish-black usually with strongly 

 developed white margins; perigjTiia obovate, strongly flattened, 3 to 3.5 mm. 

 long, substipitate, abruptly beaked, the beals 0.25 mm. long, minutely bidentate ; 

 achenes naiTower than perigynia. short-stipitate. 



Dry mountain sides, high Sierra Nevada in Tulare Co. (Glacier Lake, Dudley 

 1699). East to Arizona and Colorado. 



Bef. — Carex albo-nigra Mackenzie in Rydb. Fl. Rockv Mts. 137 (1917), type from Needle 

 Mt, Wyo., M. Vary 613. 



99. C. mertensii Prescott. Culms 3 to 10 dm. high, very sharply triangular, 

 rough; leaf -blades 4 to 7 umi. wide; spikes 1 to 4 cm. long, the upper approxi- 

 mate, the lower more remote on slender peduncles ; scales lance-ovate, acute ; 

 perigynia appressed, broadlj' oval, much flattened, purple-spotted, tapering at 

 apex, minutely beaked, the beak 0.5 mm. long, entire ; achenes strongly stipitate. 



Momi tains, Trinity Co. (North Fork Coffee Creek, Goldsmith 20). A well 

 marked and handsome species abundant farther north. Extending to Alaska 

 tUid Montana. 



Ref. — Carex mertensh Prescott, Mem. Acad. St. Petersb. ser. 2, 6:168 (1833), type loc. 

 Sitka, Alas. 



