yep looks like seeds. Probably a few hermie flowers floatin around in there. In my experience banana flowers usually appear either right in the top most buds...or on the lowest buds near the soil...or at the preflowers on the first few nodes of the main stem. If I were you I'd get in there close and find the source of the pollen.
Pollen that leads to seeds decreases bud the and yeild. That's why we try so hard for seedless crops. I think I recall hearing that from jorge Cervantes grow DVD. Anytime pollen in room you will see reduction in female bud production as they turn the making into seed making. Of course you could still sell it but if for meds you should be honest with patients.
I have dealt with the hermi problem before in my garden. It usually indicates a light leak coming in from somewhere during their night time hours or just a weak strain that is prone to hermi. Don't fear or throw away that bud though. For one if you pollinate a female that turns male hermi and pollinate itself or another female in the room then 99% of the time the seeds will be feminized from that seed crop. This is a great way to mix strains and produce a feminized seed product. Yes the bud is not as good for smoking once you pop all the seeds out, but take the bud (after pulling seeds out) and run that bud through a dry keef box with screen and get yourself some great dry hash, or cook it down into butter for eatables. What ever works best for you. Just be patient though because just like harvesting good weed, it takes time for those seeds to mature as well so the darker, bigger, and tiger striped the better. Hope this helps.