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. 



