H4 ROGK GARDENING FOR AMATEURS 



must be planted in very stony soil in a sunny position. 

 Cover with glass in the winter. It is found on moun- 

 tains in Europe and Asia. Closely allied to this is 

 A. arachnoidea, a more spreading plant with white flowers, 

 while A. Chamaejasme, the " Rock Jasmine," has flowers 

 which open pure white, but gradually become pink with 

 age ; both open in early summer. 



The members of the second group, although very 

 beautiful, are less valuable from a garden point of view, 

 because they are more difficult to manage. They usually 

 grow in crevices of rocks or in heaps of rocky debris 

 at high altitudes, conditions that are difficult to imitate 

 in this country. They are happiest in the moraine. 



A. alpina. Grows in the fissures of rocks, forming 

 close tufts like a small cushion, with nearly sessile white 

 flowers in spring. To grow it successfully it must have 

 a vertical fissure in a wall with scarcely any soil, and with 

 a partly shaded aspect. It is native of the European 

 Alps. 



A. ciliata. A beautiful plant from the Pyrenees, 

 forming large turfy tufts, covered in April and May with 

 rosy carmine flowers. It is difficult to keep in this 

 country, but may be grown in places like the preceding 

 species, in half sun. 



A. glacialis. One of the most brilliant of the high 

 mountain plants. The tufts growing in the rocky debris 

 of the Alps of Europe are often so covered by the bright 

 rose-coloured flowers, that the foliage cannot be seen. 

 It may be grown in a moraine composed of granite 



