THE HEMLOCK GROUP I3I 



Lebanon and grows in shape of slender spire against 

 a sky, so similarly does the T. Albertiana differ from 

 the T. Canadensis. While the more Western Hemlock 

 at quieter rate of growth tapers upward, the Canadian 

 Hemlock, like the Cedar of Lebanon, displays a 

 lateral top growth, which nursery gardeners more 

 bluntly call clump-headed. 



Two more signs of recognition must be looked for, 

 as between these two, the stalkless cone and less- 

 defined hue of the white stomata on lower side of 

 leaf of the new^-comer, by which the Albertiana pro- 

 claims his whence and title to a separate name. 



T. Brunoniana is the other of the serrulate-leafed 

 trio, the Himalayan representative of the Hemlock 

 Spruces. Its much longer leaves, their brilliantly- 

 lighted-up silvery under-surface, their longer conical- 

 shaped yellow-brown cones, make the tree, which 

 unfortunately does not acclimatize well with us, an 

 easy target for identification. 



We now come to the entire-leaved-margin trio — 

 namely, the T. Sieboldii, T. Diversifolia, T. 

 Caroliniana. 



Of these the T. Sieboldii asserts the individuality 

 alone among Hemlocks of glabrous shoots. Its leaf 

 is longer than any except that of the Brunoniana. 

 From the Brunoniana it also differs, as has been 

 pointed out, in leaf margin. There is yet another 

 marked difference. While the apex of the leaf of the 

 Brunoniana is acute, that of the Sieboldii is rounded 

 and notched. 



The Si-boldii also again can be distinguished from 

 another Japanese representative, the Diversifolia, 

 by the fact that its shoots are glabrous while the 

 Diversifolia's are pubescent. 



The Caroliniana Hemlock, discovered by Professor 

 Gibbes in the Blue Ridge mountains of N. and S. 

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