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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. 
Fic. 72.—Leaf 
of Pansy, 
i with Leaf- 
Fig. 70. — Palmately Divided Leaf Fig. 71. — Leaf of Ap- like Stip- 
of Buttercup. ple, with Stipules. ules. 
They agree in being netted-veined, i.e., in having veinlets that join each 
other at many angles so as to form a sort of delicate lace-work like Figs. 
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. 
