198 ROCK GARDENS 



massing of the plants applies also, in a certain 

 degree, to shrubs, for when several of the 

 same species are planted together, the effect 

 is far more striking than when they are 

 grown singly. 



Of shrubs suitable for covering the heights 

 and the intermediate space between the rock 

 plants and the larger shrubs, I should advise 

 a selection from the following : — The family 

 of Rhododendron is of chief importance, and 

 varieties suitable for our purpose will be 

 found in such dwarf-habited kinds as ciliatum^ 

 hirsutum^ ferrugineum^ Racemosum^ myrtifolium ; 

 also Axalea amcena and its varieties ; the 

 Menziesias, polifolia^ polifolia alba^ and 

 Bicolor ; and of the Ledums, Palustris and 

 latifolium ; while amongst the numerous 

 Cistus family such varieties as Jiorentinus^ 

 Jormosus^ lusitanicus ^ and Rosmarinifolius will 

 be found most useful. Of the Genistas and 

 Cytisus one cannot go far wrong in select- 

 ing the following : Cytisus Ardoini^ Kewensis^ 

 purpureusj and Purpureus albus^ Genista pro- 

 strata^ saggitalis^ and tinctora^ Ji, pL 



Some of these, such as Cytisus Ardoini 



