THE ROCK-WALL IN SHADE 33 



joints and also Anemone sylvestris, while A. hepatica 

 is never so well pleased as when its roots are close to 

 or among stones. 



Snapdragons are grand wall-plants, both in sun 

 and shade. I think the tender colourings, white, 

 yellow, and pinkish, are the most suitable for the 

 cool exposure, and the fine dark crimson reds and 

 mixed colourings for the warm one. 



The many kinds of Houseleek {Sempervivum) are 

 perhaps better suited for joints in the warmer side of 

 the wall and warm spaces in the rock-garden, though 

 many will thrive in the cool wall. 



Many a plant that one would scarcely have thought 

 of putting in the wall will come there of its own will. 

 Such a lesson I learnt many a year ago from the 

 pretty little Smilacina bifolia^ which is by nature a 

 woodland plant. I had put some on the top of a 

 piece of dry-walling facing north, to fill the space 

 temporarily while some Andromedas were growing 

 that were to crown the wall-top. The little plant 

 grew downward into the chink as the picture shows 

 and then spread along the next lower course, mak- 

 ing itself quite at home. 



Two of the Acaenas will be welcome, namely, 

 A. microphylla and A. pulchella. The first is the one 

 most commonly grown, but A. pulchella has merit, not 

 only on account of the pretty form of the delicately- 

 cut leaves, but from their unusual bronze colouring. 

 In the wall also one can more easily escape their 

 burrs, which are always too ready to catch hold of 

 clothing. 



C 



