I90 ROCK GARDENS 



produced, which is very objectionable. The 

 formation of the ground will help in this, to a 

 certain extent at least. 



As an example of what can be obtained by 

 this method, imagine a drift of Campanulas 

 stretching half way up the face of the bank, 

 with a tuft of mossy Saxifrages covering the 

 rocks which bound the path, while in another 

 place a cascade of Androsace lanuginosa falls 

 on to a strip of Silene alpestris growing at 

 its foot ; while again a dazzling patch of 

 Gentiana acaulis is seen extending right up 

 to rocks covered with a snow-white torrent 

 of Thymus Serpyllum alba. Many such pictures 

 as these could be suggested did space permit. 



Annuals may give a great show of bloom 

 for some months during the summer, and are 

 usually very easy to grow; but they have the 

 great objection that once their bloom is past 

 they die away, leaving an ugly blank in the 

 garden. With the majority of perennial rock 

 plants it is different. They are beautiful even 

 when not in bloom, on account of their 

 foliage and habit of forming compact tufts, 

 which increase year by year, and give that idea 



