VEINS OF THE LEAF. 



11 



LESSON II. 



VEINS AND VENATION OF THE LEAF. 



6. The blade of the Quince leaf (Fig. 2) shows many veins 

 running through it, and branching all over it. Examine 



Fig. 2. Leaf of the Quince, showing the veiiivS. 



them. First, the petiole seems to be extended and continued 

 right through, from the base to the apex, forming the largest 

 vein in the leaf. This is the midvein. 



7. Next observe several large branches sent off from this 

 midvein on both sides, right and left. These are the veinlets. 

 Now, looking at these veins, their arrangement reminds us of 

 a feather, and we call such \Q2iYe^ feather-veined. Therefore, 



Violet'? Do all kinds of leaves have petioles? — of Phlox, for example? 

 What do you understand by sessile leaves ? 



C. Describe the midvein of the Quince leaf. 



7. Doscril>e the veinlets. What is the feather-veined venation ? 



