APPENDIX. 365 



fig. Qo), and that which is intended to serve merely as a receptacle for 

 plants {see fir/. QQ) ; sometimes with the last kind of rock-work is com- 

 bined an aquarium (see fig 67). The first of these does not require any 

 particular care in planting, except that the rocks should not be over- 

 shadowed by tall trees ; but the second and third kinds need skilful 

 planting, as their beauty depends principally on the plants they contain. 

 The principal point to be attended to in selecting plants for rock-work is 

 to choose those that do not grow too fast, and yet flower profusely ; as 

 the great difficulty is to keep each plant within its proper bounds, and 

 yet to have the whole a mass of flowers. 



List of Plants for Roch- Worlc. 



The following plants are very suitable for rock-work, to flower from 

 February to May : — White."^ The wood Anemone ; Anemone montana ; 

 the white Hepatica ; A'rabis alpina, and A. albida ; the white and 

 Scotch Crocuses (Crocus biflorus) ; Snowdrops ; the white double Prim- 

 rose ; and Sanguinaria canadensis. Blue. Anemone apennina ; Crocus 

 vernus ; the blue Hepatica ; I'ris pumila ; Grape Hyacinth ; Scilla prse'cox, 

 S. verna, and S. sibirica ; and Gentiana acaulis. Yelloio. The Winter 





R0CK.-W0RK ROUND A POND. 



Aconite ; Alyssum saxatile ; Crocus sulphiireus and C. luteus, and the 

 Cloth of Gold Crocus (C. susianus) ; Narcissus minor, and N. Bulbo- 

 codium ; Draba aizoides ; the common Primrose ; and the Cowslip. 

 Purple. Aubrietia deltoidea ; Erinus alpinus ; the dog's tooth Violet ; 

 the common Violet ; the double lilac Primrose ; Chinese Primrose ; 



