M. grandis 'Alba' from Christie
Ambiguous. This cultivar name was registered pre-2002 but it is uncertain exactly which white cultivar the registration applied to. As long ago as 1951 Cicely Crewdson wrote of a white form of M. grandis in her garden but as plants grown under this name were scarce they were probably infertile.
See also M. grandis 'Edrom White', M. ‘Ascreavie White’, M. ’Kilbryde Castle White’, and M. grandis ‘Miss Dickson’.