INTRODUCTION 29 
/ 
For keeping records of the dates of flowering, and of 
the insect visitors to the various species, the inexpensive 
Wild Flower Calendars designed by the present writer and 
published by Rand, McNally and Co. will be found helpful. 
It has not seemed desirable to burden these 
pages with scientific names. A list of these, 
however, will be found on pages 233 to 240. 
The names there given follow Gray’s Manual, 
and in a few cases they are not generally accepted 
by botanists. A reference to Britton and Brown’s 
Flora of the Northern States and Canada will 
enable one to learn the accepted names in such 
cases. 
