COMPARATIVE VALUE OF EXOTIC CONIFER.E IX BRITAIN. 285 



years. There can be no question that in the giant arbor-vitae we 

 have, "whether for utility or ornament, a most vakiable addition 

 to our forest trees, and it is the opinion of most practical arbori- 

 culturists that it will be one of the trees of the future in Britain. 

 A native of North- West America. Introduced in 1851. 



107. T. occidentalis (American Arbor- Vitfe). — This is a tree 

 well adapted for planting in any part of the British Isles, being 

 quite hardy and not fastidious as regards soil or situation. As 

 an ornamental tree it is not of much value, neither is it for the 

 quality of its timber. The foliage is of a brownish-green colour, 

 which changes to a brownish-purple in winter, and again resumes 

 its green or normal tint dui'ing the growing season. A native of 

 Canada. Introduced prior to 1597. 



108. T. occidentalis Ellioangeriana is a distinct and pretty 

 variety, and one that has been used with good effect in orna- 

 mental gardening. It is of dense, rather formal growth, and 

 dwarf in habit. 



109. T. occidentalis Vervceneana, which we may well describe 

 as the handsomest and most distinct of all the varieties, is of easy 

 habit, with an abundance of golden-green foliage, which, during 

 autumn, changes to a light brownish-yellow. 



110. T. plicata (Siberian Arbor- Vitfe). — In this we have a neat- 

 growing and compact ornamental tree, with short branches, and 

 an abundance of brownish-green foliage. Being hai'dy and of 

 distinct appearance, it is useful for shrubbery decoration. Intro- 

 duced from North- West America in 1796. 



111. T. Wareana (Ware's Arbor- Vitaj) is a very useful orna- 

 mental conifer, with deep-green foliage, and a rather neat, bushy 

 habit of growth. For screening any unsightly object its dense 

 habit renders it of great value, while the bright green foliage-tint 

 makes it of interest, and a valuable acquisition for lawn or park 

 planting. It is said to have originated some years ago in the 

 nursery of Mr Ware, at Coventry. 



112. Thuiojjsis dolahrata (Hatchet-Leaved Thuiopsis). — As an 

 ornamental tree this ranks high, and deservedly so, for perhaps 

 in no other conifer is the tinted green of the upper and silvery 

 hue of the under sides of the leaves more prominently revealed. 

 For lawn purposes, and especially where space is limited, I know 

 of no conifer to equal it, and being hardy and of the easiest 

 culture, it is well suited for any part of the United Kingdom. 

 In well-grown specimens the contour is usually pyramidal, with 



VOL. XII., PART II. T 



