Jane McGary wrote: " It may be simply C. autumnale, the normal form from which 'Waterlily' is a sport." Jane, do you know something I don't? There is a widely grown double-flowered form of Colchicum autumnale, but that is not 'Waterlily'. The parentage of Colchicum 'Waterlily' is usually given as Colchicum autumnale 'Alboplenum' crossed with C. speciosum 'Album'. I think the intention of the hybridizer was to get a hybrid, double, white-flowered Colchicum bigger than C. autumnale 'Alboplenum'. Jim McKenney Montgomery County, Maryland, USA, USDA zone 7, where the heat has fried the colchicum this year, and 'Waterlily' is more like 'Cactus-flower'.