Hermaphrodite or Simply Pollinated?

[phillybluntsk]

I had an outdoor grow with seeds I'd used in previous years that were good. Not a 'strain' so to speak but good Arizona potent regular. As usual I got rid of males at first sign, there were 4 males and 8 females. Most were in pots but one in the soil. The winter approached rapidly so I yanked the one in the soil, the biggest one and during the trim process was shocked to find a few seeds. I think there were 3 in the batch. I see none on the potted plants, some of which are drying and some are still alive. How did this happen? I am positive the males were eliminated quickly. I wanted to know how to tell whether a plant became hermaphrodite, or whether it simply was pollinated somehow. Otherwise the buds are looking good on all the other plants, and even on the one that produced the seeds.- big purple, green and stinky. I also found a seed in a dank bud of Blue Dream and was really surprised. Wondering if I should plant it next year hoping it's feminized. Care to share your thoughts, anyone?

 

[Weaselcracker]

Barring some stray pollen wafting in from the outside world, it seems to me that most often when we find surprise seeded it is from 'nanners' which have appeared on a female plant. They are easy to miss. If you don't know what nanners are- they are tiny yellow flowers, usually about 1/8" long- skinny things that look a bit like a banana, presumably the reason for the nickname. They usually appear late in flowering. They don't have male DNA and can produce only female seeds- though these plants may or may not be prone to growing nanners as well. Nanners in my experience aren't super prolific. I never got so many that I couldn't pick them out by hand, though I almost always got some seeds.
Here's are pics of a nanner or two on one of my buds.