IDENTIFICATION OF CYPRESSES 165 



its nearly allied affinity, no such lines appear. Or, 

 again, in the case of two Thuyas of near affinity, the 

 T. Plicata (or Gigantea) and the T. Occidentalis ; the 

 former has white streaks on the under-side of leaflets, 

 the latter not. 



The glands^ the little swollen protuberances, or 

 secretory vessels, situate on the end of the leaf and 

 quite visible to the naked eye, are often a help to 

 identification. In such trees as the Thuya Plicata, 

 or Gigantea, it will be noticed that the very evident 

 presence of glands upon the Thuya Occidentalis is 

 unseen upon the T. Plicata. All these traits in their 

 characteristics are a mere generalizing of differences, 

 and but a tuning of fiddles before the grand Devil's 

 Opera. The study of Cypresses calls for a close and 

 minute attention upon the part of the tree lover, but 

 a good general idea of " w^hat's what " and " which 

 is which " among their ranks can be obtained from 

 these sources suggested — namely (i) the Cones ; 

 (2) the shape of the ultimate branchlets, whether 

 flat or tetragonal ; (3) the branchlet systems '* in 

 one plane," or " not in one plane "; (4) the leaves, 

 and in connection with them not forgetting the 

 existence or non-existence of white streaks underneath, 

 and the presence or absence of glands on the end of 

 the leaf. 



CUPRESSINEiE TRIBE 



(Of the sub-division EU-CUPRESSI, of the sub- 

 tribe THUYIN^) 



C. ToRULOSA, Macrocarpa, Sempervirens 



Their sweetest shade 

 A grove of cypress trees, 



Shakespeare. 



C. ToRULOSA, so called presumably from the 

 presence of glands on the leaves, so far as leaf appear- 

 ance goes, exhibits a very perplexing likeness to some 



