XXIV 



B. SEMPERVIRENS Continued 

 Varieties 



BS. arborescens. This name is 

 applied to the largest growing 

 form of the " Common Box," which 

 is really typical of the species as 

 found growing under the most suitable conditions. 

 The leaves are of normal size, but vary some- 

 what on different plants. They usually range 

 from } of an inch to i inch in length, and from 

 J to \ an inch in width. Specimens may produce 

 several trunks from near the ground line, or they 

 may form single trunks only. Mature specimens, 

 if not crowded by other plants, develop large 

 heads, and are equally ornamental, whether clothed 

 to the ground with branches or with a portion of 

 the trunk exposed to view. 



B. s. argentea = argenteo - marginata. A 

 dense, but not stiff, growing variety, with normal 

 sized leaves. It is distinguished by its leaves 

 being margined with silver. The variegation is 

 not equally developed, sometimes being confined 

 to a narrow border, or again taking up the greater 

 portion of the leaf. As a rule the variegation is 

 more noticeable about the apex than the base. 



224 



