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 PART 9— ARBOR- VITAE 



VALUABLE ORNAMENTAL EVERGREENS 



The collection of Arbor-Vitae occupies the western half of the 

 long narrow planted strip between the two roads in front of 

 Conservatory Range 1 (Maps pp. 7 and 57). It adjoins the col- 

 lection of Junipers directly, and if we have just finished that group 

 we can continue into the Arbor-Vitae. Otherwise we must find 

 the very low bushy evergreen that begins the collection. It lies in 

 the center of the strip and approximately opposite the lamppost 

 at the eastern side of the circular drive leading to the steps of the 

 Conservatory. Between it and the inner road is the last tree in 

 the Juniper collection. This first Arbor-Vitae is 



Thuja occidentals var. globosa, the American Globe Arbor-Vitae 



This is one of several compact globose forms that have been 

 developed from the native American Arbor-Vitae. We shall see 

 others later. They all present considerable difficulty in identifica- 

 tion, for the characters that supposedly distinguish them are fre- 

 quently very obscure. The same is true of many other forms that 

 we shall see and this condition must be kept in mind as we consider 

 them. The same names, both common and scientific, very fre- 

 quently are applied to more than one type by various persons. 

 The names used here have been selected as the most suitable for 

 various reasons. They may, however, be found to differ from 

 those used elsewhere. This, of course, applies to the entire guide. 



The American Globe Arbor-Vitae forms a very dense ball- 

 shaped evergreen, which because of its shape and limited height 

 lends itself well to many situations. 



Proceeding westward among the trees, the next upright ever- 

 green with strikingly perpendicular branches nearer the outer 

 road is 



Thuja orientalis, the Chinese Arbor-Vitae 



The Chinese Arbor-Vitae has produced quite a number of gar- 

 den varieties, all of which like the tree itself are readily recognized 

 by the distinct perpendicular arrangement of the branches and 



