THE WILLOWS OF ALASKA 339 



specimens of leiocarpa were collected on the island of Unalaska and 

 at St. Lawrence Bay, Siberia, about latitude 65° 40'. It grows on the 

 islands and both shores of Bering Sea and the Arctic Ocean, and above 

 timber line on the Pacific coast of Alaska eastward to Prince William 

 Sound, preferring not a wet soil, like most willows, but a well drained 

 humus intermixed with finely broken rock. The little pistillate cat- 

 kins, barely projecting from the tuft of leaves at the ends of the stems, 

 bear commonly 2 to 4, or occasionally 6 to S flowers, the ovaries and 

 capsules entirely smooth. 



The specimens examined are as follows : 



Prince William Sound. — Above timber line on the large, partly 

 forested nunatak of the Columbia Glacier, Coville and Kearney (No. 



1364)- 



Kadiak Island. — Above the alder line on a movmtain back of En- 

 glish Bay, Coville and Kearney (No. 1475), F. A. Walpole, 1900 

 (No. 1226). 



SJiumagin Islatids. — Popof Island, from Soo to 1500 feet elevation, 

 Trelease and Saunders (No. 33S0), Kincaid, and at similar elevations 

 on Unga Island, Trelease and Saunders (No. 3379). 



Aleutian Islands. — At Unalaska, J. M. Macoun, 1S91. Part of 

 Chamisso's type material was also collected here. Doubtless all the 

 Unalaskan specimens were collected at a considerable elevation above 

 sea level. On Atka Island, L. M. Turner, iSSo, where it is a com- 

 mon plant among the patches of crowberry {Einfetruyn nigruni). 



St. Matthew Island. — On well drained slopes of rock-weathered 

 soil close to the level of the sea, Coville and Kearney (No. 2154), 

 Trelease and Saunders (Nos. 3383, 33S4), Brewer and Coe (No. 

 476). In similar situations on Hall Island, Coville and Kearney (No. 

 20S3), Trelease and Saunders (Nos. 30S1, 30S2), Brewer and Coe 

 (No. 438). 



Point Barrow. — Near sea level, John Murdoch, 1S82-3 (No. 24). 



Siberian Coast. — Collected at Kayne, or Arakamtchechene, Island 

 by the Ringgold and Rodgers U. S. North Pacific Exploring Expedi- 

 tion, C. Wright, 1853-6. 



On the Asiatic side of Bering Sea the plant has been found at St. 

 Lawrence Bay as already noted, and was collected on the Russian is- 

 land of Karaginski by Mertens, the botanist of Lutke's voyage, in the 

 years 1S26-9. Ledebour in his Flora Rossica reports several localities 

 in the inland parts of eastern Siberia. It is probable also that some 

 of the specimens heretofore reported from Bering Sea and the adjacent 

 coast of the Arctic Ocean under the name Salix polaris^shl. belong 



