12 NEW ZEALAND NATURE-STUDY BOOK 
The Margin. The margin may be whole or entire, 
as in the Rhododendron or Quince, or it may be cut into. 
The incisions moreover may be such as to separate the 
blade into a number of divisions sometimes called lobes 
—the Plane leaf has five well-marked lobes, and each 
of these lobes may be further subdivided. The marginal 
Fig. 10.—Plane leaf showing palmate venation and five-fold 
division of blade. 
indentations moreover may be such as to produce pro- 
jections like the teeth of a saw, when the margin is said 
to be serrate; or like an animal’s tooth, when it is called 
dentate ; or the projections may be rounded, forming a 
crenate margin. For instance, the margins of the leaves 
of the Spanish Chestnut and Rewa-rewa are serrate, of the 
