Preface. 



ii. 



All the native and escaped vines found in Canada and 

 the northern United States (east of the line of the Missis- 

 sippi River, and north of the line of the southern boundary 

 of Pennsylvania) are described in the following pages ; 

 and all are pictured, in natural size, excepting in a few cases 

 where the close resemblance to other forms makes repeti- 

 tion unnecessary. 



The three guides for flower, and leaf, and fruit will 

 be readily understood, and will make identification in 

 most cases easy. 



Technical terms are avoided, as far as possible. 



I have reason again to thank Dr. N. S. Britton, 

 Emeritus Professor in Columbia University and Director 

 of the New York Botanical Garden, for valuable aid and 

 suggestion. 



