ON FACT VS. THEORY 
Taking, then, this latter, the highest sub- 
kingdom, we find that it separates into two broad 
divisions, called classes, one of which is distin- 
guished by bearing its seeds in enclosed packages 
called ovaries; the other bearing seeds which are 
exposed, or naked. The first of these classes 
includes the vast majority of seed-bearing plants; 
the other including principally those trees, like 
the pine and the cypress, which bear their seeds 
in open cones. 
Next, on our chart, we shall find that the class 
is subdivided into orders. The order represents 
a collection of related families. As an example, 
the order Rosales is made up of the rose family, 
the bean family, the cassia family, the mimosa 
family and twelve other families closely allied. 
Below the order comes the family—a division 
which is still broadly inclusive; the rose family 
for example taking in not only the rose, itself, 
but the apple, the blackberry and sixty-two other 
plants whose close relationship might not at first 
be evident. 
From the family we next narrow down to the 
genus—which separates the rose from the apple 
and the blackberry and gives each its own classi- 
fication. 
Beneath the genus there comes the species. 
And beneath the species the variety. 
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