214 STUDIES IN GARDENING 



good drainage, and not be overshadowed by any other 

 plant. It may be interspersed with Arenaria montana 

 which thrives in the same position, or with Saxifraga 

 pyramidaHs, which, milike most of the rosette Saxi- 

 frages, prefers a soil free from lime. Most of these 

 rosette Saxifrages will do well on the north side, espe- 

 cially the great Saxifraga longifolia and the little S. 

 valdensis, both of which dislike a very hot place; 

 but for both of these north-west is better than north- 

 east. Many also of the smaller Campanulas like a 

 north aspect. Indeed, C. pulla always does best on 

 the north side, especially if it is spUt up and replanted 

 in fresh soil every two years or so in the spring. C. 

 muralis with its larger variety is an excellent plant 

 for a north aspect, and it may be mixed with the 

 beautiful Silene alpestris with the best effect. Other 

 Campanulas that do well on northern slopes are C. 

 turbinata, the dwarf form of C. carpatica, C. Tom- 

 masiniana, a most delicate little Harebell, so small 

 that it must not be put near any large plant, C. Scheu- 

 zeri, C. pumila or caespitosa, and C. garganica with 

 its varieties. This likes a north-west aspect and a 

 very open situation; and it may be mixed with the 

 little Silene acaulis, a native of the Welsh mountains, 

 which is apt to burn up in a very hot sun. Another 

 delicate little plant that will do well with a north-west 

 aspect is Asperula hirta, a Woodruff with pale pink 

 flowers, which roots deeply and spreads fairly rapidly 

 in a well-drained place among the rocks. This also 

 may be mixed with Campanula garganica, or with 



