Can you tell me what this is?

that's a sac... carefully pull it before it opens up. see how you can almost see something dividing the pod up in sections -- also a easy way to distinguish from a calyx. those sections are what split open to reveal the anthers, or 'nanners' ... thoroughly check the plant.. it's really late to see this, so i think this is stress realted vs natural herm? but who knows. these can even be buried under older layers of calyxes and not easily seen, but still pumping out pollen. if you can isolate that's teh best way to go if you need the extra yield and cannot forego it. daily inspections even so... and always do chores in hermie area at end of day.. don't go from hermie to normal plants, obviously.