136 ALPINE FLOWERS AND ROCK GARDENS. 



G. F. Wilson is a hybrid, a good dwarf plant with 

 deep blue flowers. 



Isophylla is often grown in pots, for, owing to its 

 trailing habit, it droops gracefully down in a spray of 

 beautiful blue flowers and green foliage. The white 

 variety is almost more attractive, and might be given 

 the preference for pots, as it is exquisitely lovely when 

 in full bloom, and graces the window of many a subur- 

 ban gardener in a way that few other plants can 

 equal. The isophyllas are, however, quite suitable 

 for the rock garden ; in fact, few species are more 

 attractive. They like a loamy soil with plenty of 

 grit, and if planted in a crevice from which they can 

 droop over a large stone they look their best. It is 

 well to give them a fairly sheltered position where 

 they get plenty of sun without exposure to cutting 

 wind. 



Passing over persicifolia and its varieties, beauti- 

 ful though they are, as more suited for the border 

 than the rockery, we come to Portenschlagiana, which 

 is often grown under the name of muralis, or the wall 

 Harebell. It is of very close, tufty habit, forming a 

 compact carpet of dark green leaves and large, cup- 

 shaped, light blue flowers. This is a very useful 

 species, as it will grow almost anywhere. There is 

 a large form of it called Bavarica, which many prefer 

 to the type. 



Pulla is one of the most popular of the small Hare- 

 bells. It is a charming little plant, the deep violet 

 flowers of which are borne singly on the stems. It 

 only grows two or three inches high, and spreads into 



