viii Preface 



Hooker, Sir J. D. The Student's Flora of the British 

 Islands, 1884. 



Rendle. The Classification of Flowering Plants, Vol, I. 



Warming. Fr^plante7'ne, 191 2. 



Willis, J. C. Flowering Plants and Ferns, 1908. 



My best thanks are due to Mr Tansley for help and 

 advice with the Pteridophytes, to Professor Seward for 

 reading the proofs of the Pteridophytes and Gymno- 

 sperms, and to Dr Moss who has read the entire proofs 

 and given me much valuable advice and assistance 

 throughout. 



H. G. C. 



Cambridge, 

 August 191 3, 



