PREFA CE . Vli 



righted photographs from Alaska. To those who have con- 

 tributed drawings the author is indebted as follows: to Professor 

 Margaret C. Ferguson, Wellesley College; Professor Bertha 

 Stoneman of Huguenot College, South Africa; Mr. H. Hassel- 

 bring of Chicago; Dr. K. Miyake, formerly of Cornell University 

 and now of Doshisha College, Japan; and Professors Ikeno 

 and Hirase of the Tokio Imperial University. The author 

 is also indebted to Ginn & Co., Boston, for the privilege to 

 use from his "First Studies of Plant Life" the following figures: 

 28, 29, 46, 48, 49, 56, 62, 66, 67, 87, 102, 103, 422-426, 429, 



430, 43 8 -44o, 443, 444, 448, 449> 45 2 > 47 2 ~475- A few others 

 are acknowledged in the text. 



CORNELL UNIVERSITY, April, 1905. 



