,oS MAPLE. HORSE CHESTNUT. [CHAP. 



corresponds closely with the greater distance between 

 the points of attachment. 



When we pass from the species hitherto considered, 

 to the Maples (Fig. 69), Sycamores, and Horse 

 Chestnuts (Figs. 67 and 68), we come to a totally 

 different type of arrangement. The leaves are placed 

 at right angles to the axis of the branch instead of 

 being parallel to it, have long petioles, and palmate 



FIG. 67. Horse Chestnut. 



instead of pinnate veins. In this group the mode of 

 growth is somewhat stiff ; the main shoots are per- 

 pendicular, and the lateral ones nearly at right angles 

 to them. The buds, also, are comparatively few, 

 and the internodes, consequently, at greater distances 

 apart, sometimes as much as a foot, though the two 

 or three at the end of a branch are often quite short. 

 The general habit is shown in Figs. 67 and 68. Now, 

 if we were to imagine six Beech or Elm leaves on these 

 three internodes, it is obvious that the leaf surface 



