THE ROCK-WALL IN SUN 21 



crops large and small, from the tiny Sedum glaucum 

 and the red-tinted 5. lydium and brittle dasyphyllum, 

 through the many good kinds of moderate size, of 

 which pulckellum t kamtschaticum, and Ewersii are im- 

 portant, to the large-sized . spectabile blooming in 

 September. Among these, one of the most useful is 

 S. spurium in three colourings ; pink, a deeper colour- 

 ing near crimson, and a dull white. It is one of the 

 easiest plants to grow ; a few little pieces (they 

 need scarcely be rooted) will quickly take hold, and 

 a year hence make sheets of pretty succulent growth 

 smothered with bloom in middle summer. 



The pretty Phloxes of the setacea group are capital 

 plants in the hot wall ; in their second and third 

 year hanging down in sheets ; the only one that 

 does not hang down is the charming pink "Vivid," 

 which has a more tufted habit. The free-growing 

 P. Stellaria, one of the same family, should not be 

 forgotten. Its colour, a white tinged with faint 

 purple, makes it suitable for accompanying Aubrie- 

 tias, which do well both in sun and shade. 



There is a lovely little labiate, Stachys Corsica, 

 which is a delightful small plant to grow in level 

 joints ; it is not much known, but is desirable as a 

 gem for the warm wall. Arnebia echioides is also a 

 good wall-plant. 



It will be important that the wall, especially if it is 

 of any height, should have a crown of bushy things 

 at its top ; and not a crown only, for some shrubby 

 and half-shrubby plants should come down the face 

 here and there to a depth of two or three joints, and 



