198 CONIFEROUS TREES 



unfortunately, it is not generally hardy. When 

 seen in a thriving condition it forms a round- 

 headed pyramid, the branches and branchlets 

 gracefully drooping towards the points, and thickly 

 furnished with leaves that are longer than those 

 of any other member of the family, and of an 

 intense silvery hue underneath. Each leaf is 

 about I inch long, fiat, and serrulated particularly 

 towards the point. The cones are produced 

 singly at the branch-tips, and are almost similar 

 in size and shape to those of the better known 

 T. canadensis. Being apt to suffer from frost 

 after having started into growth in spring, this 

 tree should always be planted in a position where 

 vegetation generally is late in commencing growth. 

 Winter frosts have little effect upon the tree ; it 

 is the immature shoots of last season or the present 

 that suffer most. The rate of growth under 

 favourable circumstances is nearly i foot a year. 

 One specimen that I measured had attained to 

 the height of 20 feet in nineteen years, and pro- 

 duced cones regularly. 



T. CANADENSIS, CarrUre, The Hemlock 

 Spruce. (Synonyms : Pinus canadensis, Lin- 

 ncBUS ; Abies canadensis, Michaux ; Picea cana- 

 densis, Link.) 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, half an 

 inch long, silvery beneath, and thickly produced. 



