54 STUDIES IN GARDENING 



been successfully cultivated for any length of time in 

 England, and are never likely to be until some new 

 secrets of acclimatization are discovered. 



But there are other plants with the same kind of 

 requirements, but less exacting, which often fail in 

 English gardens because they are usually treated like 

 the purely saxatile plants and so are apt to suffer from 

 drought in the summer. Among such plants, some of 

 which can be grown easily enough in the manner we 

 have described, are Androsace carnea, A. ciliata, A. 

 villosa, and A. vitaliana (also called Douglasia), 

 Dianthus alpinus, and D. callizonus, Draba Mawii, 

 and D. pyrenaica (also called Petrocallis), Globularia 

 nana, Myosotis rupicola (this plant will thrive in a 

 narrow chink, but needs protection from drought), 

 Polemonium confertum, Omphalodes luciliae (a very 

 capricious plant, which will often thrive on a north 

 slope), Rhododendron chamaecistus (which likes some 

 shade), Saxifraga burseriana, S. apiculata, S. Gries- 

 bachi, S. Boydii, S. squarrosa and S. caesia, and Silene 

 acaulis. Some of these plants are quite easy to grow, 

 as, for instance, Androsace carnea and A. villosa, 

 Polemonium confertum, and the white form P. c. 

 mellitum, Saxifraga apiculata and S. caesia and Silene 

 acaulis. But they are all the better for surface mois- 

 ture, and are apt to perish from drought if grown as 

 purely saxatile plants. There are also many plants 

 which come between the two classes. Many of the 

 Alpine primulas, for instance, are purely saxatile 

 plants in their native mountains, yet are apt to suffer 



