PREFACE ix 



as the hybrids ; but others will have none of this, and they 

 smile pityingly at what they term misguided enthusiasm. 

 There are over 300 known species, whilst explorations in 

 China, and elsewhere, are still adding to the number. The 

 number of hybrids already exceeds the number of species, 

 so there is ample choice for us all. 



FRED. W. MOORE. 



ROYAL BOTANIC GARDENS, 

 GLASNBVIN. 



