SOME OF THE ORNAMENTAL SHRUBS AND VINES. 355 



The purple-leaved variety of the common barberry (B. 

 vulgaris) comes third in value to give variety to groups 

 and borders. It retains the purple color of leaves through 

 the season. It contrasts finely with golden-leaved or 

 lighter green leaves of trees or shrubs. To keep this 

 fine variety in compact, bushy form it needs heading-in, 

 while young, in the dormant season. 



In the West the common barberry and the purple-leaved 

 are troubled with the cluster-cup fungus on their foliage. 

 But the first two named, and indeed all the Oriental 

 species we have tested, are free from fungus disease of 

 the leaves. 



336. The Snowball Family. — The tree or shrub cran- 

 berry ( Viburnum opulus) is native to the Northern and 

 Western States, and it thrives under nearly all conditions. 

 It is an interesting large shrub for background posi- 

 tions. Its cymes have sterile and fertile flowers, followed 

 by scarlet fruit that hangs on late in autumn and is often 

 used for jelly and marmalade. 



The common snowball with sterile flowers is an old-time 

 shrub in all parts of the Northern States. During recent 

 years its foliage has been so weakened by the green aphis 

 that it is less prized for ornamental planting. But careful 

 spraying (159) with kerosene emulsion, turning the nozzle 

 upward, will give thrifty bushes, as we enjoyed in the West 

 thirty years ago without treatment. 



The Chinese species ( Viburnum plicatum) is now 

 planted almost exclusively at the East and South, but in 

 the prairie States it has not proven able to endure our test 

 winters. Where it thrives it is superior in beauty of its 

 sterile flowers and in its plaited or plicated bright-green 

 leaves to the common species. 



337. The Bush Honeysuckles. — Lonicera sjilendens 

 stands well at the head of the group for varied use on 



