4 HORTICULTURAL MEMOIRS. 



the summer the luxuriance they possess in their 

 native climates. Many tender and transient 

 varieties of flowers, and among those the varie- 

 ties of the pink tribe, are remarkable for the 

 facility and certainty with which they are pro- 

 pagated, and for the constancy of their charac- 

 ters. Every rustic cottage is covered with ge- 

 raniums, and ornamented with numerous pinks, 

 rarely seen in this country but among careful 

 florists. Even the greenhouse is influenced by 

 the climate. It is well known, that the Helio- 

 tropium Peruvianum, a plant otherwise of suf- 

 ficiently easy cultivation, is in England much 

 limited in its growth, becoming woody and 

 feeble after it has attained a certain height. 

 Here, on the contrary, if placed on the bed of 

 earth in the house, although no artificial heat be 

 applied, it soon fills the whole space, running 

 over the -bed, and striking fresh roots from its 

 branches as it advances. But of all those shrubs 

 which require the protection of the greenhouse 

 in England, the Verbena triphylla, is that of 

 which the luxuriance is here the most remark- 

 able. Its miserable stature and bare woody stem 

 are familiar to us. In Guernsey, it flourishes 

 perfectly exposed, and attains the size of a tree 

 of twenty feet and upwards, spreading in a 

 circle of a diameter equal to its height, and its 

 long branches reaching down to the ground on 

 all sides. Its growth is indeed so luxuriant, that 



