182 GEORGE B. RIGG 



It is a pleasure to the writer to acknowledge his indebtedness 

 to Professor C. Schroter, Professor H. C. Cowles, Professor 

 F. E. Clements, Professor A. Dachnowski, and Professor F. K. 

 Butters for conferences in regard to bogs, during the visit of the 

 International Phytogeographic Excursion to the Puget Sound 

 region; to Mr. Hunt of the United States Forest Service at Cordova, 

 Alaska, for a conversation with reference to bog conditions at 

 Yakutat; and to Professor Robert F. Griggs for the identification 

 of willows and some other bog plants. 



