Jim Waddick wrote: The cultivar 'White Angel' is registered as a cultivar of > Iris douglasiana, so may not be used with Iris cristata. > There is an unregistered "Eco White Angel" for an Iris > cristata , but this is not a valid, registered name. Registration is not necessary for a name to be valid, so long as it has been published properly, i.e. named with a description in a dated, printed publication circulated to the public. It is of course desirable for a name to be registered with a registration authority in genera where these exist, but it is not mandatory! For example, the registrar for Galanthus cultivars is the Dutch Bulb Growers Association (KAVB), but only a tiny number of names have been registered. John Grimshaw Dr John M. Grimshaw Garden Manager, Colesbourne Gardens Sycamore Cottage Colesbourne Nr Cheltenham Gloucestershire GL53 9NP