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 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 palm of the hand) into fingers, and so named pal- 
Fig. 4 a. Leaf of Sweet-gum (Liquidambar). 
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 @ is a lobed 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? 
