E VER ORS E N TREES AND SHRUBS. 565 



ground, and from twenty to forty feet high. Even without clipping, 

 it grows in a form almost perfect for high hedge screens, and bears 

 the shears so well, that it may easily be kept to the height of three 

 or four feet. It is beautiful in any form it is made to assume. 

 The foliage has a bright green tone, which is slightly browned by 

 the cold in winter. Fig. 179 is the usual form of specimens grow- 

 ing on exposed hill-sides. 



Parsons' Arbor- Vit^. Thuja occidentalis compacta. — This is 

 a beautiful sport of the native sort, of a golden-green tone, and 

 globular form, nearly as broad as high. The warmth and bright- 

 ness of its color are conspicuous. Its growth is slower, broader, 

 and more compact, than the American or Siberian. 



Hovey's Arbor-Vit^. Thuja occidentalis hoveyii. — A pretty 

 seedling of the common arbor- vitae, of dwarf habit, globular form, 

 and warm green color. 



The Siberian ARBOR-ViTiE. Thuja siberica. — This most 

 beautiful tree of the family has come among us in such a mysterious 

 way, that even our indefatigable amateur arboriculturist, H. W. 

 ^argent, does not seem sure of its origin or relationship. It greatly 

 resembles the American arbor-vitae in all its good qualities, but has 

 a more velvety tone of color, is broader in proportion to its height, 

 and probably a lower tree or bush at maturit}' ; perfectly hardy, 

 always beautiful, and regarded either as an evergreen shrub or 

 small tree, unites more good qualities for common use than any 

 other we know of. Josiah Hoopes, in his Book of Evergreens, 

 claims it as a variety of the American arbor-vitas. 



The Tartarian Arbor- Vit/e. Biota tartarica (B. pyrami- 

 dalis). — It is doubtful if it offers features distinct enough to distin- 

 guish it at sight from the varieties of the American and the Siberian 

 arbor-vitaes. Form compact, pyramidal ; foliage dark ; hardy. 



The American Golden Arbor-Vit^e. Thuja occidentalis 

 aurea. — A seedling brought to notice by H. W. Sargent, Esq., which 

 he describes as having its new growth very distinctly yellow, the 

 old foliage of a bright, clear green, both blending to form a most 

 pleasing little tree, or shrub, and perfectly hardy. 



