COMPOUND LEAVES. 
47 
you have been describing leaflets as if they were sim¬ 
ple leaves, you must now be careful not to make this 
mistake. 
Your chief difficulty will be to know leaflets from 
the lobes of deeply-lobed leaves. It is said that leaf¬ 
lets are jointed to the stalk, and you may know a 
joint by the smooth end of the broken-off petiole; 
but this is not always true. Leaflets may be found 
in all stages of union with the stem, and there is no 
way of being sure which is which but by patiently 
studying the leaves themselves. It requires a good 
deal of judgment, but there is no harm in making 
the attempt, even if it is likely to be often a failure. 
Another way of settling the question is to see if 
the green matter reaches all around the framework, 
and is continued down the common stalk (Fig. 66). 
PIG. 66. Fig. 67. 
This never happens in the case of leaflets. The way 
leaflets differ from deep lobes is shown in Fig. 67. 
If you make mistakes in this matter, never mind. 
Each mistake will help you on, if you keep trying to 
learn. 
