THE CAMPANULAS OR BELLFLOWERS. 135 



weather when strong. Those of tufty habit may be 

 increased by division between autumn and spring. 



The following are a few of the best rock species : 



AUetina, purpUsh flowers, six inches to a foot high, 

 very pretty. 



Allionij one of the very best for the rockery, owing 

 to its low, tufty habit and large blue flowers. It 

 is a genuine Alpine. It enjoys a loamy soil with 

 plenty of grit. 



Carpatica, the popular Carpathian Harebell, is one 

 of the most familiar of all, and its white variety is 

 also well known. There are other forms in cultivation, 

 although seed of them is not so easy to get as it is of 

 the blue and the white. Nurserymen offer a paler 

 blue called pallida, and a richer blue — almost a violet — 

 in River slea. The latter is a lovely form. The 

 carpaticas grow about nine inches high, and bear 

 relatively large flowers. 



Caespitosa is a good Harebell and a true Alpine. 

 The habit, as the name implies, is tufty, and it can 

 be easily increased by division. There are white 

 and pale blue forms of it, the former called alba, the 

 latter pallida. Campanula pumila is the same as 

 C. caespitosa. There are few more pleasing rock plants 

 than this dwarf, free-blooming, bright little Harebell. 



Garganica is a well-known species, dwarf in growth 

 and with violet, white-centred flowers, which are 

 borne freely in summer. There are several forms of 

 it, notably a white (alha) and a hairy-leaved Qiirsutd) 

 They all enjoy good soil, such as loam with sandstone 

 grit, but are not really fastidious in this matter. 



