159 



an}' artificial heat. Some rich mould round the roots is the only cul- 

 ture they require. The plant left all the winter out of doors was 

 situated close to a south wall ; and though it had no covering of any 

 kind, it is now pushing up new shoots. It is necessary to add, that 

 several plants of Dahlias have been raised by cuttings, which are 

 now in good health, and which will probably flower and produce 

 seeds next autumn. 



lOlh July, 1806. Above a hundred plants of Dahlias are no\v 

 growing in various parts of the gardens at Holland-House in the 

 highest luxuriance: among them are several of the yellow-flowered 

 Bidentifolia, raised from seeds saved there last year, though the au- 

 tumn proved so unfavourable. One plant of the Purpurea of An- 

 drews's Bot. Repository is already showing flowers. 



The true Rosea of Cavanilles, with doubly pinnated leaves, is also 

 growing most vigorously, and one of its stems has been pinched to 

 produce lateral shoots for cuttings. A plant left in the middle of 

 one of the borders of the French garden at Holland-House by mis- 

 take, and exposed to the severity of the winter, without any shelter, 

 is as strong and vigorous as any of the Qther two-year old plants; so 

 that there is not a doubt that this magnificent genus will soon be a 

 common ornament of the gardens in this island. 



In plate 19* is a representation of a plant of the Dahlia Pinnata, 

 or Pitrpurea. 



