336 



HABIT AND FOLIAGE 



Picea) ; in the Scotch Fir similar scars are left by the decurrent 

 bases of the dwarf-shoots. 



The peculiar appearance of the Arbor Vitae (Thuja, Fig. 194) 

 and the Cypress (Cupressus), both belonging to the Cupressineae, 

 is due to the presence of minute leaves arranged in decussate 

 pairs, and almost fused with the stem upon which they are 



FIG. 193. A, Branch of Silver Fir (Abies) with male cones. B, Branch 

 of the Larch (Larix), showing several dwarf -shoots, one of them 

 bearing a young female cone. (Both about natural size.) 



borne. Moreover, owing to the larger size of the lateral leaves, 

 and the restriction of most of the branches to their axils, the 

 shoot as a whole acquires a flattened appearance. In the com- 

 mon Juniper (Juniperus), which is likewise a member of the 

 Cupressineae, three leaves of the usual needle type arise at each 

 node, and such a whorled arrangement is characteristic of this 

 whole family. Large flattened leaves are seen in Araucaria, 



