So this here is my first seed pod of what I believe to be P. planifolia X 'Pirouette' but I have to say despite my hopes I am a bit skeptical. I was under the impression that P. planifolia could not hybridize with the Mexican pings and if it was to self pollinate it needed pollen from a different flower on the plant. It was the only P. planifolia bloom in the greenhouse and I did very carefully hand pollinate it with the P. 'Pirouette' so as to avoid any self pollination. To be honest when I did this I didn't have any hope of it actually producing a seed pod I was just hoping for a miracle :P So we will see what sprouts later!
Feel free to put your two cents in if you have more experience pollinating P. planifolia!