nanners are named after bananas and are basically male pollenorgans without the flowerpetals and they look like a bunch of bananas in form and colourWell nanners from what I read are basically just a prolapsed pollen sac. It doesn't need to burst like actual pollen sacks. They generally appear for a few different reasons with the main ones being stress, genetics, and running the plants a little long in flower (its a last ditch effort to reproduce).
I think my nanners are a result of me splitting the main stem accidentally.
they are releasing pollen as soon as they appear and one bundle like above is enough to pollinate a full tent ... i have heard stories that not all nanners produce fertile pollen and also in the above case i would just remove the bundle and dont loose sleep over it as these came to late to fully seed your plant(s)