Occasional Papers of the Museum of Zoology 5 



names. However, all the plant specimens collected spoiled during 

 the wet summer of 191 2, and the names used are based entirely on 

 field identifications. The whole of the work would have been 

 impossible without the co-operation of Dr. Barton W. Evermann, 

 then chief of the Alaska Fisheries Service. 



Climatic Conditions 



The climate of interior Alaska is sub-arctic; there is a long 

 winter, with temperatures constantly below freezing and usually 

 below zero, and a short summer, in which the days are often hot, 

 but with nights as a rule cold. Table I gives a summary of meteoro- 

 logic data for several interior stations from records furnished by 



TABLE I 



Meteorological Records of Interior Alaska 



the United States Weather Bureau. The records for lowest 

 temperature, average snowfall, and average number of rainy or 

 snowy days are taken from charts which evidently are somewhat 

 old. A noticeable feature is the close similarity in the records from 

 the different stations. Nearly uniform climatic conditions are 

 found over nearly the whole of the interior. 



Throughout the region the variations in temperature are 

 extreme. On June 27, 191 5, a temperature of 100° F. was officially 

 recorded at Fort Yukon, and temperatures of 90° are common in 

 summer at many places in the interior. The recorded extreme 



