Seed in outdoor harvest

So I've grown two fem seeds and I've been drying em for a while and I was about to put em in jars when this little black seed with tiger stripes on it fell down. It looks pretty viable... but what are the chances that it actually is viable and will not turn into a hermie? ideas?

Nevermind. I found a whole bunch of other ripe seeds. It's entirely possible that they got pollinated by some of the local ruderalis. Probably explains why the yield was so low. Cheers!

EDIT: on the other hand the second plant has absolutely no seeds. They were grown side by side. Help me understand this