This is not entirely unheard of in the plant world. I read once that a lone marijuana plant, will change it’s sex in the middle of a growing season, if it has no cross pollination.....................
Lecturer at lady’s garden club ....
“Sometimes when the air is still, a flower will shoot its pollen straight up and it will fall right back into the same flower. This is called self-pollenization, and it tends to make the flower go crazy.”
Another marijuana danger. ;-)