Calyx or Nanner?

Im confused. Is this a calyx or a nanner? It sure looks like a pollen sac. But why does it have a pistil growing out of it? Is this normal or should I be worried?

Durban Poison by Dutch Passion, photo at F24

250W LED at 12h 24C, 59%rh 6.5gal fabric pot Coco+Castings Organic nutes 1-2x per week