UPON THE BRITISH FLORA. 17 



Since writing this paper I find from Lord Eustace Cecil that 

 he planted a single shrub of Erica lusitanica some years ago in the 

 Manor Grounds of Lytchett Heath, which is now the centre of 

 several hundreds of others, which have spread themselves over a 

 considerable area. This is only one of many instances of plants 

 which have been introduced into a new locality either accidentally 

 or by human agency under conditions favouring a permanent 

 occupation. 



