216 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



17. Salix commutata Bebb, Bot. Gaz. 13: 110. 1888. 



Type locality: Alpine liogs, Eagle Creek, Wallowa Mountains, Oregon. 



Range: Washington and Oregon. 



Specimens examined: Olympic Mountains, Piper, August, 1895; Mount Rainier, 

 Smith, August, 1890; Cascade Mountains, 1,940 meters altitude, Tweedu; Stevens Pass, 

 Samlberg d' Leiherg, 757. 



Zonal distribution: Arctic and Hud.sonian. 



17a. Salix commutata mixta nom. nov. 



Salix commutata sericea Bebb, Bot. Gaz. 13: 111. 1888, not S. sericea Muhl. 



Type locality: "North side of Mt. Hood," Oregon. 



Range: Washington and Oregon. 



Specimens examined: Olympic Mountains, Piper, August, 1890; Fhtt 112; Horseshoe 

 Basin, Lahe <£• Hull 765. 



17b. Salix commutata denudata Bebb, Bot. Gaz. 13: 111. 1888. 



Type locality: Eagle Creek meadows, Wallowa Mountains, Oregon. 



Range: Washington and Oregon. 



Specimens examined: Cascade Mountains, Tweedy in 1882. 



Salix commutata differs in but slight and seemingly inconstant characters from S. harclayi. 

 Additional material and field study is needed to clear up their relationships. 



18. Salix tenera Anders.; DC. Prod. 16-: 288. 1864. 



Type locality: "Ad Cascade Mountain, Lat. 49°, alt. 7,000 ped." Collected by Lyall. 

 Range: Cascade Mountains, Washington and British Columbia. 



Specimens examined: Cascade Mountains, latitude 49°, Lyall in 1860; mountains north 

 of Ellensl)urg, Bramleyee 1083; Mount Rainier, Flett 21 IS. 

 Zonal dlstribution: Arctic. 



19. Salix saximontana Rydberg, Bull. .\. Y. Bot. Card. 1: 261. 1899. 

 Type locality: Grays Peak, Colorado. 



Range: Washington and Montana to Colorado and Calil'ornia. 



Specimens examined: Mount Rainier, Flett 2119. 



Zonal distribution: Arctic. 



Probably not specifically distinct from S. nivalis. 



20. Salix nivalis Hook. Fl. Bor. Am. 2: 152. 1839. 



Type locality: "Near the summits of the peaks in the Rocky Mountains." 

 Range: Washington to Montana and Wyoming. 

 Specimens examined: Mount Rainier, Flett 2278. 

 Zonal dlstribution: Arctic. 



21. Salix sitchensis Sanson in Bong. Mem. Acad. St. Petersb. VI. 2: 162. 1832. 

 Salix cuneata Nutt. Sylva. 1: (56. 1842. 



Type locality: Sitka. 



Range: Alaska to midtlle California, eastward to the Blue Mountains. 



Specimens examined; Clallam County, Mrne/' 2428; Seattle, Pi/jer 557; <S?r((7/i in 1889; 

 Tacoma, Flett 31; Nisqually, Allen 108, White Salmon, Sulcsdorf'm 1879; Atanum River, 

 Flett 1346; Mount Adams, Suksdorf 31; west Klickitat County, Suhsdorf 24; Skagit Pass, 

 Lake & Hull 809; Stevens Pass, Sandberg & Leiherg 720; Spokane, Sandberg & Leiherg, May, 

 1893; Hangman Creek, Sandherg cfc Leiherg 72; Blue Mountains, Piper, August 2, 1896; 

 Stehekin, Griffiths & Cotton 243. 



Zonal distribution; Transition and Canadian. 



Salix ciilorophylla Anders. Vet. Acad. Handl. Stock. 6: 138. 1867. Imperfect speci- 

 mens of a willow collected by Suksdorf on Mount Adams, July 31, 1883, and in the 

 mountains of Skamania County, September 6, 1883, are referred to this species with much 

 hesitation. 



