144. A leaf mosaic of Norway maplr. Note the varying 

 lengths "i' petioles. 



145. Shoot hi' the common white iin , one-third natni 



The picture shows the falling of the leaves from the different 

 growth, The part of the branch between the tip and A i- thi 

 season's growth; between \ and B it > two years old; the part 

 between Band li three yean old; it has few leaves The part that 

 l'ivw torn i ,i "ms ago Ijm ond ( has no l< . 



