THE WILLOWS OF ALASKA 313 



separating the waters of the Yukon and the rivers flowing into Kotzebue 

 Sound from those of the Arctic coast, this tree-willow does extend be- 

 yond that divide to the headwaters of the Arctic rivers, and in many 

 places furnishes the only wood available as fuel to Indians, prospec- 

 tors, and explorers. 



Mr. Rydberg's Salix longistylis^ based on a specimen collected at 

 the mouth of Klondike Creek, Yukon Territory, although compared 

 by him only with Salix sitchensis^ is clearly identical with the present 

 species. 



Specimens of Salix alaxensis have been examined as follows : 



Skagxvay and White Pass. — At Glacier on the White Pass railroad, 

 and at Skagway, F. A. Walpole, 1900 (Nos. 1071, 1077, 1106). 



Lake Bennett. — On the shore and uplands, J. B. Tarleton, 1S99 

 (No. 12, in part). 



Glacier Bay. — At various points about the bay, Coville and Kearney 

 (Nos. 622, 639, 663, 696, 698, 699, 702), Trelease and Saunders 

 (Nos. 3344103348, 3364), Brewer and Coe (No. 57), Walter H. 

 Evans, 1897 (No. 156). 



Takutat Bay. — Abundant on the west side of the bay, and at its 

 northern end and arms, Coville and Kearney (Nos. 996, 105S, 11 20, 

 1 149), Trelease and Saunders (Nos. 3349, 3359? 347°, in part). 



Prince William Sound. — At Port Wells, Coville and Kearney 

 (No. 1270), Trelease and Saunders (No. 3372), Brewer and Coe 

 (No. 136). 



Cook hilet. — At several points between the head of Cook Inlet and 

 the Tanana River, E. F. Glenn, 1S99. Sparingly on the delta of a 

 glacier at Halibut Cove, Kachemak Bay, Coville and Kearney, No. 

 2419). 



Kadiak Islatid. — Sparingly on the lower mountain slopes in Eng- 

 lish Bay, Coville and Kearney (No. 1441). Near Kadiak village, 

 Trelease and Saunders (No. 3351), Brewer and Coe (No. 223). 



Shu77iagin Islands. — Sparingly at Sand Point and in other localities 

 on Popof and Unga, Coville and Kearney (No. 1622), Trelease and 

 Saunders (No. 3343), M. W. Harrington, 1 87 1-2. At Mist Har- 

 bor, Nagai Island, C. H. Townsend, 1S93. 



Alaska Peninsula. — At Kukak Bay, Coville and Kearney (No. 

 1622), Trelease and Saunders (No. 3350) ; in Stepovak Bay, Palache ; 

 and at Nushagak, C. L. McKay, 1881. 



Yukon Valley. — Headwaters of Koyukuk River, F. C. Schrader, 

 1899. At Rampart House, on the Porcupine River, Frederick Funston, 

 1S94 (No. 175). At Dawson, Yukon Territory, R. S. Williams, 1899. 



Proc. Wash. Acad. Sci., August, 1901. 



