Coniferous ZTrees. 197 



of the sprays golden yellow, intermixed with green ; nana, 

 a very dwarf variety a couple of feet high only, broad and 

 spreading ; plumosa, with very large and feathery sprays of 

 a fluffy appearance. There is a sub- variety of this cedar 

 with yellow variegations (plumosa aurea), and one in which 

 the young growth is creamy white (argented). This species 

 is one of the most useful garden plants. The smaller varie- 

 ties are handsome in rockeries, and the larger ones in groups 

 and as specimen trees. Oh. pisifera is a remarkable and 

 picturesque species with very long, cord-like branchlets. It 

 is of a compact habit and very beautiful and characteristic 

 when well grown. In the variety filifera, this peculiar 

 habit is more pronounced. Oh. squarosa is one of the most 

 common of the smaller coniferse. It has fluffy, feathery 

 sprays of a glaucous or silvery-gray color, and forms a small 

 shrub or tree of a broadly columnar habit. These last 

 kinds are excellent for rockeries. The American white 

 cedar (<7A. thuy aides) is also a very fine and ornamental 

 tree, useful for planting in deciduous woods and shrub- 

 beries as an undergrowth. 



Arbor- Vita, Thuya. Some of the arbor- vitses are 

 trees of considerable size, but many of the garden varieties 

 are compact forms of a more or less globular or columnar 

 habit. The American arbor-vitse (Thuya occidentalis) is 

 a common tree, growing in small colonies on almost any 

 kind of ground, from rocky hillsides to cold swamps. The 

 garden varieties are numerous and more common in cultiva- 

 tion than the type. The following are some of the best 

 forms : alba, with the young shoots tipped with white early 

 in the season ; aurea, golden yellow ; Elwangwiana, a dwarf 



