VENATION OF THE LEAF. 



13 



the next cut (Fig. 4), representing the Judas-tree or Eed- 

 bud leaf, you see a different venation. 



10. At the base of the blade the petiole seems to divide 

 all at once into five large veins, each running through, one 

 to the apex, and four to the margin. In this case the vein- 

 ing (that is, the venation) is compared to the division of the 

 hand (or ^alm of the hand) into fingers, and so nained^aZ- 



Fig. i a. Leaf of Sweet-gnm {Zdgmdumbar). 



mate venation. Therefore, you may -say that the palmate,^ 

 venation consists of about five veins starting together at the 

 base of the blade, each one branching into veinlets and 

 veinulets. Fig. 4 a is a lohed leaf of the Liquidambar tree, 



9. Note the parts of this Willow leaf. Point out its midvein. Its veinlets 

 -veinulets. 



10. Define the palmate venation. What are the veins ? 



