Yeah... no.
Subgenus and Section are taxonomic rankings based on how much they differ from the the taxonomic rank above it. Subrankings differ less (as in from
genus to
subgenus) compare to full rankings (as in from
genus to
section).
So the difference between the the general genus Streptocarpus and section saintpaulia is greater than the difference between the general genus Streptocarpus and the subgenera streptocarpus or streptocarpella.
Think of if this way: the difference between a human and an orangatan is greater than the difference between a human and a chimpanzee.
Not that you really want to know all the particulars, but if you do, this is part of what I put together for taxonomy talks I do:
and an example:
