xii LIST OF PLATES 



Ramondia nataijab . . . to face page 264 



Primula involucrata, Pribiula cortusoeides. 



Primula deorum, • • >i 270 



The plates, except where otherwise stated, are from photographs 

 by Mr. Hobneb, of Settle, Yorkshire, and all were taken in the 

 Author's own gardens. 



