LEAVES. 



89 



more or less perfectly than a spray of elm ? Pull off a single leaf and 

 sketch its lower surface, about natural size. 



Of the two main parts whose names have already been learned (blade 

 and petiole), which is more developed in the maple than in the elm leaf ? 



Describe : 



(a) The shape of the maple leaf as a whole. 



(6) Its outline as to main divisions, of what kind and how many. 



(c) The detailed outline of the margin (Fig. 66). 



Compare the mode of veining or venation of the elm and the maple 

 leaf by making a diagram of each. 



ElG. 70. — Palmately Divided Leaf 

 , of Buttercup. 



Fig. 71. — Leaf of Ap- 

 ple, with Stipules. 



Fig. 72.— Leaf 

 of Pansy, 

 with Leaf- 

 like Stip- 

 ules. 



They agree in being nettedr-veined, i.e., in having veinlets that join each 

 other at many angles so as to form a sort of delicate lace-work like Tigs. 

 67, 68. 



They differ, however, in the arrangement of the principal veins. 

 Such a leaf as that of the elm is said to be feather-veined, or pinnately 

 veined. 



The maple leaf, or any leaf with closely similar venation. Is said to 

 be palmately veined. Describe the difference between the two plans. 



