GENUS TSUGA. 131 



{Synonyms: — Pinus canadensis, Linnaeus; Abies canadensis 

 Desfontaines ; Picea canadensis, Link ; Abies cnrvifolia, Salis- 

 bury.) North-East America. 1736.— This is the best known 

 species, and is particularly suitable for cultivation in this 

 country. It is of pyramidal habit until about half its height 

 is attained, after which the top gradually assumes a flat or 

 rounded form, the branches become more open, and the 

 branchlets decidedly pendulous. The leaves are of a pleasant 

 green above, ^ an inch long, silvery beneath, and thickly pro- 

 duced. Cones are borne in great profusion at the branch tips, 

 each being about i inch long, and composed of about twenty- 

 five brownish, broadly wedge-shaped scales. Few evergreen 

 trees can surpass the hemlock spruce for beauty and richness of 

 foliage, or distinct and pleasing outline ; and during spring and 

 early summer the young drooping shoots, of a lively yellowish- 

 green, contrast nicely with the dark and sombre hue of the older 

 foliage, and form a combination that for beauty of effect is 

 certainly hard to match. The soil best suited for the growth 

 of the tree is rather strong, damp loam ; indeed, some of the 

 finest trees that I have seen are growing by a lake-side, and 

 where the roots must be partially submerged at all seasons. 



T. canadensis aurea is, judging from the few 

 specimens that I have had the opportunity of examining, no 

 great acquisition, the colouring being both irregular and 

 inconstant. In the juvenile state it is preferable to more 

 advanced years. 



T, canadensis g^lobularis erecta is of dwarf, 

 spreading appearance, with thick, closely arranged branches, 

 that are at first erect, but afterwards gracefully drooping. 

 The leaves are closely arranged, smaller and narrower than 

 those of the species, and of a much lighter green colour. It 

 is of continental origin. 



T. canadensis macrophyila, — Both in colour of 

 foliage and habit of growth this is totally different from the 

 parent. The habit is dwarf, the outline regular, but not stiffly 

 so, and the compact masses of foliage are of the darkest and 

 most decided shade of green, and greatly intensified by their 



