ON TREES AND SHRUBS. 



413 



grower, and bears an abundance of flowers along the pendulous 

 shoots late in the season. The double flowered kind, prunifolia 

 flore-pleno, should be planted largely, as it is particularly 

 valuable on account of its early-flowering qualities ; it 

 grows freely, and its double pure white flowers are borne 

 abundantly along the previous year's wood, and last long in 

 good condition. This is a first-rate wall shrub. S. Margarita 



Fig. 266. — Flowering Sprays of Spiraea discolor. 



should be allowed plenty of room to develop, as it is 

 of free growth and carries a great quantity of soft pink 

 flowers. S. bullata (S. crispifolia) makes a fine rock shrub ; 

 in fact, the rock garden is its proper place. It forms a dense 

 bush, rarely above ift. high, with neat deep green wrinkled 

 leaves and small corymbs of rose-coloured flowers. .S. decumbens 

 is also a fitting subject for the rock garden. It forms a neat 

 little shrub about ift. high, and bears an abundance of white 



