Thank you as well pudder, for chiming in. Your experience is valued here. I'm not sure what soil that is, but if I can remember correctly it was Nature brand potting soil, with about 20% perlite and 10% vermiculite added. This is my normal mix, but the brand varies. Not sure. The shrooms are coming out of the soil, not the stalk. Don't know the humidity, but it's not real high probably around 50%. I put a small fan in there since this started.

I hope that answers your questions, and I appreciate your insight. My plan was to transplant it tomorrow (probably), get it healthy enough for cloning (hopefully), then start another mother and trash the first one. But are you saying the mycelium might be in a cutting from an apparent healthy mother as well? How is this possible unless mycelium is a systemic, and I'm pretty sure it's not.