vi PREFACE 



I must, as in the first series, acknowledge my 

 indebtedness to many writers whose works I have laid 

 under contribution, but more especially to the artists, 

 the results of whose labours form the main attraction 

 of this book, to Messrs. W. H. J. Boot, R.B.A., and 

 A. Fairfax Muckley, who have painted the originals 

 of the coloured plates ; to Messrs. J. A. Weale and 

 V. W. Saxby, who have made and photographed the 

 microscopic sections of woods and pine-needles ; and 

 to Messrs. F. Mason Good, H. Irving, and E. J. 

 W. i His, from whose photographs the uncoloured plates 

 of trees are taken. 



G. S. BOULGER. 



