ON TREES AND SHRUBS. 



417 



U. m. vars. macrophylla, atropurpurea, laciniata, and cinerea 

 are by no means so well known as they deserve to be. 

 U. alata is a green-leaved kind with distinct cork-like bark. It 

 rarely exceeds 35 ft. in height. 



Vacciniums are useful shrubs and very free-flowering. Those 

 here mentioned are quite hardy and delight in peaty soil. 



Fig. 268. — Viburnum Opulus sterile. 



V. corymbosum (Swamp Blueberry) often grows about 7ft. high, and 

 carries dense clusters of pale pink flowers in May and June on 

 the previous year's- wood. V. pennslyvanicum (Dwarf Blueberry) 

 is a showy, low, much-branched autumnal - tinted shrub bush, 

 with' racemes of pale rose-coloured flowers, succeeded by sweet 

 bluish-black berries. V. uliginosum and V. stamineum are also 

 noteworthy. 



2 E 



