THE LEAF. 



FIG. 5. 



FIG. 6. 



branch off from the veins are known as veinlets. Point 

 out the ribs, veins, and veinlets in all the leaves you have 

 that exhibit them distinctly. 



Now, when you hold a leaf between your eye and the 

 light, and observe these veinlets uniting with one another 

 in such a way as to form a kind of irregular net-work, you 

 have in hand a reticulated or net-veined leaf (Figs, i and 6). 



If, on the contrary, the leaf you are examining has 

 veins more or less parallel to one another, or to the edge 

 of the leaf (Figs. 7 and 8), and if they are connected by 

 unbranched veinlets, they are termed parallel-veined leaves. 



There is a further observation to be made 

 concerning the venation of net-veined leaves. 

 When, as in Fig. 9 or Fig. i, the midrib gives 



FIG. 7. 



FIG. 8- 



