INTRODUCTION 37 



as fitted to the existing flora, must help our understanding of the 

 problems of agriculture and horticulture. For cultivated, as well 

 as wild plants, respond to their environment, and any study of 

 such response and the conditions that cause it, will help to solve 

 the many, unsolved problems of cultivation. The relation of local 

 floras to crop possibilities lies outside the scope of this book, but 

 that there is such a relation and that our local flora can be used» 

 to some extent, as a crop indicator, seems quite certain. 



