I am investigating pots to see if they still have bulbs in them. One unlabelled pot has three white bulbs that look like lilies except the scales are tight to the bulb. They are about the size of a walnut, or maybe a big toe (a bit bigger than the end of my thumb). There are rather thick white roots. As far as I can remember, there hasn't been any topgrowth all year. I'd appreciate a guess as to the genus, and then I could check my old records.