PREFACE 



THE difficulty of treating a subject as wide as plant- 

 geography within the compass of a primer is so obvious 

 that it is hardly necessary to crave the reader's recogni- 

 tion of the limitations of space. 



Originality is neither possible nor entirely desirable in 

 a book of this character, and I hope that the brief Biblio- 

 graphy may be accepted in lieu of further acknowledge- 

 ment of my indebtedness to others. 



I wish, however, to take this opportunity of thanking 

 those who have kindly assisted me by the loan of illus- 

 trations Sir David Prain, F.R.S., by whose permission 

 Figs. 2, 8, and n were copied from pictures in the Kew 

 Museum; Dr. T. W. Woodhead and the Council of the 

 Linnean Society for permission to use Fig. 3; Professor 

 Herbertson and Mr. Edward Arnold for Fig. 5; the 

 British Vegetation Committee and Mr. A. G. Tansley for 

 Figs. 12-16; and Messrs. Quelle and Meyer, of Leipzig, 

 for Figs, i, 4, 6, 7, 9, and 10, from Professor Graebner's 

 Pflanzengeographie. 



G. S. BOULGER. 



RICHMOND, October 1912. 



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