318 STUDIES IN GARDENING 



near the Lithospermum, but a good contrast to it is 

 Saxifraga cotyledon, the most useful of all the rosette 

 Saxifrages. There are several varieties of this, but 

 they do not difiFer much. It can be easily raised from 

 seed or increased by offsets, and flowers very freely. 

 It likes a rich, light soil, and does not need lime. It 

 should be given plenty of space, as each rosette will 

 grow into large patches. There are, of course, in- 

 numerable Saxifrages, and at least twenty of them 

 might claim to be among the best fifty rock plants. 

 We must include one more of these and we choose 

 S. Burseriana major for its extreme beauty. It needs 

 some care and should be grown in a cool, well-drained 

 place, where it gets sun for about half the day. The 

 soil should consist of fibrous loam, leaf-motJd, and 

 mortar rubble, and the plant should be surrounded 

 with rubble or chips of rock. It is small and must 

 be secluded from all rampant plants. There is the 

 same difficulty with the Campanulas as with the 

 Saxifrages. It is hard to make a choice among them. 

 We choose the best variety of Campanula garganica, 

 the name of which appears to be uncertain. It has 

 pale starry blue flowers, is easily raised from seed, 

 and thrives in any well-drained open place among 

 rocks and in rich, light soil. There is no Campanula 

 more beautiful either in flower or in habit. If a more 

 vigorous Campanula is required, we must add C. 

 muralis, especially its larger variety, Portenschlagiana. 

 This will grow anywhere on the rock garden, and looks 

 its best contrasted with Silene alpestris, an exquisite 



