PREFACE 



VAUCHER long ago called attention to the fact that 

 some species of Rock Rose have stipules while others 

 have none, and suggested that it would be interesting, 

 if possible, to ascertain the reason for this difference, 

 The idea seemed to me a good one, and I devoted 

 myself to a study of the question, with the result which 

 will be found in the following pages. 



This inquiry led me on to examine the structure 

 of buds ; and the diversity and ingenuity of the devices 

 by which plants protect the young and tender tissues 

 from heat, cold, drought, moisture, insects and other 

 animals, proved so fascinating that I hoped it might 

 not be without interest for others. 



The results have been printed in greater detail by 

 the Linnean Society, 1 and I have here selected those 

 parts which seemed to me of most general interest. 



I have to thank Mr. THISELTON DYER, the Director 

 of Kew Gardens, Dr. SCOTT, and the whole staff, for the 

 facilities they have kindly afforded me. 



1 ' On Stipules,' Parts i-iv. (Linnean Society's Journal Botany, 

 vols. xxviii, xxx, xxxiii), 1890, 1894, 1897. 



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