162 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
6. Carex aquatilis Wahl. Kongl. Vet. Akad. Handl. II. 24: 165. 1803. 
Type vocauity: “Hab. intra ripas fluviorum per Lapponiam.” 
Rance: Washington to New England, south to Colorado. 
SPECIMENS EXAMINED: lone, Kreager 426. 
7. Carex arcta Boott, Ill. 155. t. 497. 1867. 
Carex canescens oregana Bailey, Mem. Torr. Club 1: 75. 1889. 
Type Locauity: “In America boreali, Canada, Lake Superior, Rainy Lake, Lake of 
the Woods.” 
Rance: British Columbia to Quebec, south to Oregon and Vermont. 
SPECIMENS EXAMINED: Seattle, Piper 997; Henderson 2074; Mount Rainier, Allen 271; 
Mount Adams, Suksdorf 2063, 11; Tacoma, Flett 13; Chambers Lake, Henderson, August 
23, 1892; Palouse, Henderson 2060; Falcon Valley, Suksdorf 902; Usk, Kreager, August 
11, 1902; without locality, Vasey in 1889; Clealum, Cotion 845; Toppenish, Henderson, 
May 28, 1892. 
ZONAL DISTRIBUTION: Transition. 
8. Carex aristata R. Br. in Richards. Bot. App. Frankl. Journ. 751. 1823. 
Tyre Locauity: British America. ~ 
RanGE: British Columbia to Saskatchewan, south to Oregon, Utah, and New York. 
SPECIMENS EXAMINED: Conconully, Griffiths & Cotton 310; Spangle, Suksdorf 2600; 
Phileo Lake, Suksdorf 2599. 
ZONAL DISTRIBUTION: Arid Transition. 
9. Carex athrostachya Olney, Proc. Am. Acad. 7: 393. 1868. 
Type LocaLity: Yosemite Valley, California. 
Rance: Washington to California and Colorado. 
SPECIMENS EXAMINED: Cascade Mountains, 7T'weedy 9; Ellensburg, Piper, July, S97; 
Whited 557; North Yakima, Henderson 2066; Easton, Henderson in 1892; Lake Chelan, 
Lake & Hull 416; Spokane, Henderson in 1892; Marshall Junction, Piper 2278; Palouse 
City, Henderson, July, 1892; Union Flat, Henderson in 1892; Pullman, Elmer 873; Piper, 
August, 18983; Kittitas Valley, Cotton 1215. 
ZONAL DISTRIBUTION: Arid Transition. 
10. Carex atrata L. Sp, Pl. 2: 976. 1753. 
Type Locatity: ‘In Alpibus Europae.”’ 
Rance: Arctic regions south to Oregon and Colorado. Europe. 
SPECIMENS EXAMINED: Mount Rainier, Allen, August 14, 1895; Mount Adams, File/t 
1402. 
ZONAL DISTRIBUTION: Arctic. 
10a. Carex atrata nigra ( All.) Gaudin, Agrost. Helvet. 115. 1811. 
Carex nigra All. Fl. Pedem. 2: 267. 1775. 
Type LocaLity: ‘In summis alpibus Pedemontii et Sabaudiae.” 
Rance: Washington to Colorado, Europe. 
SPECIMENS EXAMINED: Mount Stuart, Hlmer 1124, 1125. 
11. Carex aurea Nutt. Gen. 2: 205. 1818. 
Type Loca.ity: Shores of Lake Michigan. 
RANGE: Subarctic regions southward to California, Colorado, and the Great Lakes. 
SPECIMENS EXAMINED: Clallam County, Elmer 2712; Port Ludlow, Binns in 1890; 
Coupeville, Gardner 303; Klickitat River, lett 1363; Falcon Valley, Suksdorf 35; Rattle- 
snake Mountains, Cotton 709; Conconully, Griffiths & Cotton 277; Lake Omack, Griffiths & 
Cotton 400; Mount Stuart, //mer 1141; Wilbur, Henderson, July, 1892; Union Flat, //ull, 
July, 1892; Pullman, Piper, May, 1892; Meyers Falls, Kreager 591; Klickitat River, 
Cotton 1452. 
ZONAL DISTRIBUTION: Transition. 
