CHOICE PLANTS FOR ROCK GARDENS 129 
their clusters of tiny star flowers, lie almost flat upon the 
ground. All these miniature kinds make themselves a 
home in cool, semi-shaded nooks in the lower levels of the 
rockery, and they like leaf mould and sharp sand in fair 
proportion in their rooting medium. 
Still diminutive in stature, but 
with larger flowers, we have C. 
allioni and G. F. Wilson, the latter 
a hybrid of rare quality. C. car- 
pathica is a type of which many 
garden varieties of merit have been 
introduced, the average height 
being within rz foot, and the 
flowers upturned, of saucer or 
shallow cup shape. About the same 
height are C. rotundifolia, in blue, CAMPANULA Punctata. 
white, and double-flowered forms, 
and its varieties Hostii and soldanelliflora plena, C. 
Tommasiniana, C. planiflora, and several others. The 
clustered heads of sessile flowers of C. glomerata Dahurica 
afford us another distinctive form that is of interest, the 
hybrids Van Houteii and Burghalti are remarkable for the 
extreme length of their drooping bells. Practically all 
of the Campanulas do better in positions where for some 
part of the day they are shaded from the full glare of the 
sun, but with few exceptions they are quite simple in 
their requirements, and they may be planted with more 
confidence than most things in positions of total shade. 
Slugs and snails are destructive to the soft young 
growths of the smaller Campanulas, and they also, together 
I 

