162 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 



6. Carex aquatilis Wahl. Kongl. Vet. Akad. Handl. II. 24: 165. 1803. 

 Type locality: "Hab. intra ripas fluviorum per Lapponiam." 

 Range: Washington to New England, south to Colorado. 

 Specimens examined: lone, Kreager 426. 



7. Carex arcta Boott, 111. 155. t. 497. 1867. 



Carex canescens oregana Bailey, Mem. Torr. Club 1 : 75. 1889. 



Type locality: "In America boreali, Canada, Lake Superior, Rainy Lake, Lake of 

 the Woods." 



Range: British Columbia to Quebec, south to Oregon and Vermont. 



Specimens examined: Seattle, Piper 997; Henderson 2074; Mount Rainier, Allen 271; 

 Mount Adams, Sulcsdorf 2063, 11; Tacoma, Fleit 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, Cotton 845; Toppen'ish, Henderson, 

 May 28, 1892. 



Zonal distribution: Transition. 



8. Carex aristata R. Br. in Richards. Bot. App. Frank!. Journ. 751. 1823. 

 Type locality: 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 Olnej^ Proc. Am. Acad. 7: 393. 1868. 

 Type locality: Yosemite Valley, California. 



Range: Washington to California and Colorado. 



Specimens examined: Cascade Mountains, Tweedy 9; Ellensburg, Piper, July, 1897; 

 Whited 557; North Yakima, Henderson 2066; Easton, Henderson in 1892; Lake Chelan, 

 Lake & Hidl 416; Spokane, Henderson in 1892; Marshall Junction, Piper 2278; Palouse 

 City, Henderson, July, 1892; Union Flat, Henderson in 1892; Pullman, Elmer 873; Piper, 

 August, 1893; Kittitas Valley, Cotton 1215. 



Zonal distribution: Arid Transition. 



10. Carex atrata L. Sp. PI. 2: 976. 1753. 

 Type locality: "In Alpibus Europae." 



Range: Arctic regions south to Oregon and Colorado. Europe. 



Specimens examined: Mount Rainier, Allen, August 14, 1895; Mount Adams, Flett 

 1402. 

 Zonal distribution: Arctic. 



10a. Carex atrata nigra (All.) Gaudin, Agrost. Ilelvet. 115. 1811. 

 Carex nigra All. Fl. Pedem. 2: 267. 1775. 



Type locality: "In summis alpibus Pedemontii et Sabaudiae." 

 Range: Washington to Colorado. Europe. 

 Specimens examined: Mount Stuart, Elmer 1124, 1125. 



11. Carex aurea Nutt. Gen. 2: 205. 1818. 

 Type locality: vShores of Lake Michigan. 



Range: Subarctic regions southward to California, Colorado, and the Great La! es. 



Specimens examined: Clallam County, Elmer 2712; Port Ludlow, Binns in ISGO; 

 Coupeville, Gardner 303; Klickitat River, Flett 1363,; Falcon Valley, Suksdof 35: Kattk-- 

 snake Mountains, Cotton 709; Conconully, Griffiths <& Cotton 277; Lake Omack, Griffiths c& 

 Cotton 400; Mount Stuart, Elmer 1141; Wilbur, Henderson, July, 1892: Union Flat, Hull, 

 July, 1892; Pullman, Piper, May, 1892; Meyers Falls, Kreager 591 ; Klickitat River, 

 Cotton 1452. 



Zonal distribution: Transition. 



