38 
THE FIRST BOOK OF BOTANY. 
35 its lobes spreading, in place of referring to the 
sinus. 
Fig. 38. 
Sharp and deep Sinus. 
EXERCISE VI. 
The Shapes of Leaves . 
You have seen that leaves take on many different 
shapes. All the leading forms which they assume are 
shown in this exercise. Each figure has a name of its 
own; but you need not fear the task of learning so 
many new words. Give yourself no trouble about 
it. When you find a leaf that is like any figure 
here given, use the name given to the figure in de¬ 
scribing the leaf, and, by doing this over and over, 
you will find that the word will seem to become part 
of the shape. When you see the shape, the word 
will come at once into your mind. Never try to 
learn botanical names in any other way. Be sure 
that, if you really study plants as they abound every¬ 
where, the language needed to describe them will be 
learned without any sense of effort. If you collect 
