198 INTRODUCTION TO BOTANY 
or more different species of plants. We must, however, keep 
in mind the fact that what we really want to find out is not 
primarily the names of plants, but what plants are, how and 
where the different groups live, how they reproduce them- 
selves, and how their habits of living are related to the life 
of other living things. We must have definite names for 
plants and for their parts in order to be clear when we speak 
of them, just as we need names for different people in order 
that we may designate them in a definite way, although we 
are more interested in what they are and what they do than 
in their names. 
