VENATION OF THE LEAF. 



13 



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

 bud leaf, you see a different venation. 



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

 all at once into five large veins, each rumiing tlirougli, one 

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

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

 hand (or j[)ahn of the hand) into fingers, and so named ^a^ 



Fig. 4 a. Leaf of Sweet-gum {Liquidamhar), 



mate venation. Therefore, you may say that the palmate 

 venation consists of about five veins startins: towther at the 

 base of the blade, each one branching into veinlets and 

 veinulets. Fig. 4 <z is a lohed leaf of the Liqnidambar tree, 



9. Note the parts of tliis Willow leaf. Point out its midveiu. Its veinlets 

 — veinulets. 



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



