30 
THE FIRST BOOK OF BOTANY. 
gins, with their notches very small. The) 7 are hence 
described as finely serrate and finely crenate. On the 
other hand, if the toothing is very large, as in Fig. 
18, the margin is coarsely serrate. 
When coarsely-notched leaves have finer notches 
upon their margin, as in Fig. 19, the leaves are said 
Fio. 18. 
Coarsely Serrate. 
Fig. 19. 
to be doubly serrate, dentate, etc. When the notches 
are of all sizes, and without any order, as in Fig. 20, 
they are said to be unevenly serrate, or crenate, or 
dentate. Yon will often find two or more kinds of 
toothing upon the same leaf. In such cases, to de¬ 
scribe the margin, you have only to put together 
these names of the different kinds of notches. For 
instance, if part of the notches are serrate and part 
dentate, this forms a serrate-dentate margin. If some 
of the notches are crenate and some serrate, it will be 
crenate-serrate, and so on. 
Such deep notches as are seen in Fig. 21 form 
lobes, and the margins of these lobes vary like other 
leaf-margins. 
The questions in schedule second are asked con- 
