MORPHOLOGY OF ANGIOSPERMS. 



Ill 



whatever the general type of venation may be and thus form a 

 net-work or reticulum, hence the leaves are said to be reticulate 

 or NETTED-vEiNED. The principal types are aS follows : A chest- 



FiG. 73. Sassafras officinale. 3, 4, variable forms of leaves, some being entire and 

 elliptical or oval, others with a single sinus (mitten-shaped), and still others 3-lobed; x, a 

 flowering branch; 2, branch showing some of the drupes. 



nut or chinquapin leaf (Fig. 72) furnishes a good illustration 

 of a pinnately-reticulate leaf. The principal vein which runs from 



