PREFACE 



The object of this Handbook is to furnish a convenient 

 and easy means of determining the wild and cultivated 

 flowering plants found in the East. The rarer plants grown 

 in greenhouses and in Botanical Gardens are not included. 



In the preparation of the Keys it has been the aim to make 

 the book usable to the untrained as well as to the trained 

 Botanist; as a result we have sought to give only essentials 

 and to use as simple terms as possible. 



In addition to the plants themselves, I have freely con- 

 sulted Britton's Manual, Gray's New Manual, and Bailey's 

 Cyclopedia of American Horticulture. The scientific names 

 given preference in the native plants are those used in 

 Britton's Manual. The arrangement of Orders and Fam- 

 ilies is that commonly accepted by present Botanists. 



In the preparation of this work valuable suggestions have 

 been received from Prof. Carlton C. Curtis and Dr. Bernard 

 O. Dodge, to whom I am very grateful; much credit is also 

 due my wife who has so generously assisted in many phases 

 of the work. 



C. A. D. 



Columbia University, New York City. 

 April, 1912. 



