Ulmus × hollandica 'Major' is a distinctive cultivar that in England came to be known specifically as the Dutch Elm, although all naturally occurring Field Elm Ulmus minor × Wych Elm U. glabra hybrids are loosely termed 'Dutch elm'. It is also known by the cultivar name 'Hollandica'. Nellie Bancroft considered 'Major' either an F2 hybrid or a backcrossing with one of its parents.

Ulmus minor Mill., the field elm, is by far the most polymorphic of the European species, although its taxonomy remains a matter of contention. Its natural range is predominantly south European, extending to Asia Minor and Iran; its northern outposts are the Baltic islands of Öland and Gotland, although it may have been introduced by humans. The tree's typical habitat is low-lying forest along the main rivers, growing in association with oak and ash, where it tolerates summer floods as well as droughts.