28 INTRODUCTION 
almost any good-sized composite flower and com- 
pare what you see with these drawings you will 
be able to make out the structure of the parts of 
these tiny flowers. 
In the case of the Daisy, the Wild Sunflower 
and similar plants the petals of the florets around 
the outside of the head have been greatly enlarged 
and modified to serve in attracting insects to visit 
the blossom. Their importance in this respect you 
can readily show by pulling off the ray florets of a 
white Daisy and comparing the conspicuousness 
of the flower-head that is left with that of another 
in which the ray florets have not been removed. 
BOOKS FOR COLLATERAL READING 
In the study of any subject it is generally desirable that 
the student should read more than one book in order that 
he may obtain a fuller knowledge and get a varying point 
of view. In the following pages there will be found fre- 
quent references to the special treatment of various wild 
flowers which occurs in the books in the list below. It is 
desirable that these books be available for reference by 
the students, so that they may follow out the suggestions 
for study given in these pages. 
Blanchan. Nature’s Garden. Doubleday, Page & Co. 
Dana. According to Season. Charles Scribner’s Sons. 
Gibson. Blossom Hosts and Insect Guests. Newson 
and Co. 
Higginson. The Procession of the Flowers. Hough- 
ton, Mifflin and Co. 
Weed. Ten New England Blossoms and their Insect 
Visitors. Houghton, Mifflin and Co. 
