DECIDUOUS FLOWERING SHRUBS 35 



the space is limited a very few will suffice. All that 

 will be here recommended are quite hardy and will 

 thrive in any good garden soil, although a deep moist 

 loam is the most suitable for them. They can be 

 readily increased by layering at the end of tine summer 

 or by cuttings of the ripened wood in the autumn. 



They are admirably adapted for the formation of 

 groups on the grass and they materially improve the 

 shrubbery when planted singly or arranged in small 

 groups in prominent positions. The strong growers 

 make fine lawn specimens when planted singly. The 

 two of special value are Viburnum Opulus sterilis and 

 V. plicatum. The first-named is the well-known Guelder 

 Rose and is the sterile form of a fairly common British 

 shrub. It reaches a height ranging from six to twelve or 

 more feet according to the conditions under which it is 

 grown, and when it has space for development it is 

 decidedly elegant in contour, and it moreover produces 

 its snowball-like flowers in greater profusion. Very 

 frequently this handsome shrub proves unsatisfactory 

 owing to it being planted in shrubberies where it is 

 crowded up with other things. The only pruning 

 necessary is the removal of the weakly wood during 

 the winter. The second of the two forms mentioned 

 is of Japanese origin and is especially useful for medium- 

 sized lawn groups. When grown in the open it attains 

 a height of from four to six feet, and when trained 

 against a wall it will rise three or four feet higher. It 

 blooms with wondrous freedom in May and the flowers 

 are produced in globular heads and are pure white. 

 V. macrocephalum if not so generally useful as the fore- 

 going possesses considerable beauty and is well deserv- 

 ing of culture. The species is of Chinese origin, forms 

 a large bush and blooms in June, the flowers being 

 white and arranged in pyramidal trusses. 



WEIGELA OR DIERVILLA. A small genus of Japanese 



