Have: id of 'mystery bulb' from swap
Scott had some marvelous "mystery bulbs", and I had thought they may be what's referred to as "African Hostas", Drimiopsis maculata. I dug up some that had sprouted again in my side yard, and the bulb looks identical.
Please see the link below - if you look VERY closely, you can see the tops of the bulbs. I'm fairly certain that's what they are.
Here is a link that might be useful: African Hosta