It is NOT a hermie, just something that cannabis does once in a while.
It will not cause any problems or the result of any problem, just quite "normal".
I have had this happen numerous times, as well as buds growing on leaf stems and is nothing to worry about.
I have pictures of exactly the same thing in my diary "cannabis conundrums, posted in week 7.
And male flowers don't have any pistils.
Hope this helps,........
Organoman.