LEAF-FORMS AND FIGURES. 



17 



16. In the next fonr kinds of leaves yon will notice tliat 

 tlie broadest place is midway between the base and apex. 

 Thus the orhicidar (Fig. 14), or rounded, leaf is about as 

 broad as it is long. The oval leaf (Fig. 15) is about one-third 

 longer than broad. This Plum leaf is an example. The el- 

 liptical (Fig. 16) is about twice longer than broad, and the 

 oblong (Fig. lY) is three or four times longer than broad. 

 Here are examples. 



Fig. 14. Orbicular leaf of "Wiuter-greeu {PyroU). 

 Fig. 15. Oval leaf of the Plum-tree. 

 Fig. 16. Elliptical leaf of Black Haw. 

 Fig. 17. Oblong leaf of a Willow. 



17. We next have four varieties of forms which are broader 

 towards the apex than base. First, the olovate (Fig. IS), 

 like this leaf of the Smoke-tree. Its outline is like that of 



16. Wlaen is the figure of a leaf called orbicular ? Will you sliow me 

 specimens ? Describe an oval leaf, and give specimens. Describe an cllii>- 

 Ucal leaf, and give examples. Describe an oblong leaf, and give examples. 



17. When will the figure of a leaf become obovate? Give examples of 



