ROCK-WORK. 247 



Campanula piimila, blue and white varieties, carpatica, 

 and nitida; Saponaria ocymoides, and Adonis vernalis 

 may be recommended. 



Alpine or Rock Plants. — Soldanella alpina, Clusii, 

 and minima. Silene acaulis, maritima plena. - Semper- 

 vivum araclinoideum, grandiflorum, and even the com- 

 mon house-leek or fouet of Scotland, S. tectorum. 

 Dwarf crimson-flowered Raspberry, Rubus arcticus. 

 Dracocephalum grandiflorum. Potentilla tritentata. 

 Phlox subulata, setacea, virginiisa, and stolonifera* 

 Oxytropis uralensis. Lychnis alpina. Linaria alpina. 

 Liatris pilosa and spicata. Ilippocrepis comosa. Epi- 

 medium alpinum. Aubrietia deltoidea'. Bryas octo- 

 petala and Drummondii. Cardamine bellidifolia. Aster 

 alpinus. Anemone palmata, and Pulsatilla or pasque- 

 flower. No plants -produce a finer effect than the dif- 

 ferent varieties of the common rock-rose, Helianthemum 

 vulgare, double-flowered, pale, yellow, and dark orange- 

 colored, ^thionema membranaceum. Aletris fari- 

 nosa. Iris tenax. Geranium Wallichianum. Gentiana 

 septemfida. Siversia triflora. Astragalus alpinus." 

 Erinus alpinus and hispanicus. Ramonda pyrenaica. 

 Sedum ternatum. Alyssum olympicum. Antenaria 

 dioica and alpina. Dianthus alpinus and nitidus. 



In appropriate situations, a small piece of water may 

 be introduced for the culture of aquatic plants.* 

 One of the walks is sometimes arched over with wire- 



* For such a pond, it is sometime-s found difdcult to form a 

 thoroughly retentive bottom with clay, however well puddled. 

 In places near the sea, an efifective puddle may be obtained by 

 mixirig two parts of shore sand with one part of quicklime, 

 and forming a mortar of l^liem with sea-water, to be spread over 

 the bottom of the pond. This mode of pdddling was devised by 

 Mr. Robert Millie, and adopted with perfect success for a pond 

 at his curious littlo rock-work garden at Pathhead, in Fife. 



