Well, to kinda answer my own question, I wasn't comfortable with the idea of anything fuzzy continuing to be in the tank with Chicory, so I pulled the plant, popped off the offending "banana" with a pen, rinsed the plant off, and put it back in the tank. There is some gravel lodged in the rest of the banana cluster, guessing that even tho it wasn't buried when I bought it, the store probably had it buried for some length of time, which apparently isn't good for them and can cause rot.