20 WALL AND WATER GARDENS 



grassy banks. This most useful trailer is not par- 

 ticular about soil, though the Lithospermums as 

 a genus are lime-loving things. 



Another important race of plants for the hot wall 

 are the various kinds of Ibens. All will do well. The 

 commonest perennial kind, /. sempervirens, shows 

 new beauties in the wall. Still better is the hand- 

 somer /. correafolia, larger both of leaf and flower. 

 In the south of England we may also have /. gib- 

 raltarica and /. tenoreana y both white, tinted with 

 pink or lilac, and /. Pruiti, pure white, all South 

 European plants. These are short-lived perennials, 

 scarcely more than biennials, but they come well 

 from seed which should be sown in the wall ; the 

 unmoved seedlings will do ' much better than any 

 transplanted ones. 



Closely allied to the Iberises and capital wall-plants, 

 doing well in all soils, but preferring lime, are the 

 ^thionemas, mostly small neat plants with bluish 

 leaves and pretty pink flowers. ./. coridifolium or 

 pukhellum, from Asia Minor, is charming against grey 

 stones, while the Syrian ;E. grandiflorum is like a 

 beautiful little pink-flowered bush. Rabbits are very 

 fond of this family of plants, indeed they seem to 

 favour the Crucifer<z in general. When I first grew 

 the ^Ethionemas, forgetting their relationship to 

 Iberis, I put them in a place accessible to rabbits; 

 the rabbit being the better botanist recognised them 

 at once, much to my loss. But in the wall they are 

 safe. 



The sunny wall is also the true place for the Stone- 



