PREFACE ix 



the Victoria Medal of honour in commemoration of Queen 

 Victoria's Jubilee. 



Our grateful acknowledgments are made to Lieut.-Col. 

 Sir G. L. Holford, K.C.V.O., for his kindness in affording 

 us facilities for getting the illustrations. Every plant illus- 

 trated is a first-rate specimen of its kind, and all have 

 been photographed in Sir George Holford's collection at 

 Westonbirt, which is so well cultivated by his grower, 

 Mr. H. G. Alexander. 



THE EDITOR. 



