ILLUSTRATED TERMS, 



is: 



apex of the leaf, all branch from the sides of the midrib. 

 (Fig, 12,) 



Palmately- Veined Leaves have several veins of almost 

 equal size which branch from the same point at the base of the 

 blade and spread out at different angles towards the margin. 

 (Fig. 26.) 



2. Parallel-Veined Leaves are those in which the main 

 veins run side by side without branching or running together, 

 unless it is by a few almost imperceptible cross-veinlets. 

 (Fig. 10.) 



It is according therefore to the structure of their framework 

 that leaves assume their great variety of forms. The two 

 classes into which they are divided are: Simple Leaves and 

 Compound Leaves. 



FIG. 6, 



FIG. 7. 



FIG. 8. 



■e- 



"e 

 e 



Simple Leaves are those wherein the blade is unbroken. 



Compound Leaves are those that have the blade split into 

 separate parts: each part then forms a leaflet which may be 

 without, or have a little stalklet of its own. 



When the leaflets in a compound leaf are at the side of the 

 blade, and arranged as in feather-veined or pinnately-veined 

 leaves they are said to be Pinnate. In this form they occur 

 as Abruptly Pinnate, when the stalk is terminated by a pair 

 of leaflets. (Fig, 5.) Odd-Pinnate, when an odd leaflet ter- 

 minates the stalk (Fig. 6.); and again in another form when the 



