EDITOR'S PREFACE 



IN seeing this volume through the press my aim has 

 been to leave it as much as possible the Author's 

 own work. The contents have therefore been left undis- 

 turbed as regards matters of opinion and terminology: the 

 few and slight alterations made have been such as the 

 Author would certainly have approved, and are not indi- 

 cated by any square brackets. Only for the facile task of 

 selecting appropriate illustrations must I accept responsi- 

 bility. 



The Author intended to write three volumes in ad- 

 dition to those already published, but unhappily was not 

 spared to complete his full scheme. He, however, left 

 behind sufficient manuscript to make up two volumes. 

 The present volume will, therefore, be succeeded by a 

 final one, which is now in the press. 



Certain delay has occurred in publishing the volume 

 owing to the fact that when the task was first suggested 

 to me I was deeply occupied with work which could not 

 be laid aside. 



The sources of certain illustrations are acknowledged 

 as in the preceding volumes. Additional figures have 

 been obtained from : Baume und Straucher des W aides by 

 Hempel and Wilhelm (H and W) ; Illustrirte Handbuch 

 der Laubholzkunde by Schneider; Text-book of Botany by 

 Strasburger and others (Stras) ; Natural History of Plants 

 by Baillon (Bai) ; Botanik fur Forstmdnner by Dobner 

 and Nobbe ; Lie Nadelholzer by von Tubeuf. To Messrs, 

 Holzel, Gustav Fischer, Macmillan, Lovell Reeve & Co., 

 P. Parey, and Ulmer, the respective publishers of these, 

 thanks are due for courteous permission to publish the 

 illustrations in question. 



It is also a pleasure to thank Mrs Marshall Ward for 

 compiling the Index. 



PERCY GROOM. 



October, 1908. 



