THE LICHENS OF ALASKA 



BY CLARA E. CUMMINGS 



OUR knowledge of the lichens of Alaska and their distribution 

 has been materially increased by the collections of the Harriman 

 Expedition. Over 800 specimens were collected, representing 

 217 species, 75 of which were new to Alaska. At the same 

 time that I received the Harriman lichens, various specimens 

 from the United States National Herbarium were placed in my 

 hands. These were collected by C. H. Townsend, in connec- 

 tion with the work of the U. S. Fish Commission Steamer Al- 

 batross at Attu Island ; by Frederick Funston, in the upper 

 Yukon Valley ; and by Walter H. Evans and J. Henry Turner. 

 These collections add 5 species new to Alaska which are not 

 represented in the Harriman collection, and 3 species not new 

 to Alaska, but not otherwise represented in this enumeration. 

 Later, the lichen collections made in Alaska in the summer of 

 1899 by the botanical faculty of the University of California 

 were sent to me for determination. These collections, chiefly 

 the work of Professor Setchell, numbered 135 specimens, repre- 

 senting 82 species, 4 of which were new to Alaska. The 

 collection of Professor Setchell was also valuable for the new 



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