130 TSUGA, OR HEMLOCK SPRUCE FIRS 



who plant it to-day, and recall yet another Whittier 

 description : 



How yonder Ethiopian hemlock, 



Crowned with his ghstening circlet, stands, 



What jewels light his swarthy hands. 



For the purposes of identification one way we 

 might suggest would be to divide the remaining six 

 into two groups, and seek help from the diversity 

 of shape in the leaf margins. 



In the case of the T. Canadensis, T. Albertiana, 

 T. Brunoniana, the leaves are serrulate. 



In the case of the T. Sieboldii, T. Diversifolia, 

 T, Caroliniana, the leaves are entire. 



We must make this reservation with regard to this 

 method of identifying — namely, that these dis- 

 tinctions, as between serrulate and entire, by reason 

 of the almost invisible obscurity of these leaf marginal 

 signs, do not extend to the groping student, even with 

 the aid of magnifying glasses, that generous help that 

 might have been expected from the promising 

 announcement. 



Loudon describes the T. Canadensis as slightly 

 denticulate, so it is not to be wondered that more 

 amateur and unequipped observers have difficulty 

 in finding the signs with the naked eye. Under a 

 good glass you can perceive clearly some little perch- 

 back-looking protuberances, situate at rather long 

 intervals apart, and this proclaims their serrulation. 



Of all Hemlocks perhaps the T. Canadensis and the 

 T. Albertiana show the nearest resemblance, and 

 since they are the same tree of the same country, 

 only with a different geographical habitat, there is 

 no particular reason why they should not. Perhaps 

 their greatest difference exists in their shape and 

 growth. As the Deodar differs from the Cedar of 



