Any link between Canterbury Elm, Loudon's U. montana glabra major, in cultivation in England throughout the 19th century (see below), and U. praestans E. Schoch, in cultivation in Europe in the late 19th century, is unknown, but Loudon's description of a fast-growing hybrid like Huntingdon Elm, holding its leaves late, matches descriptions of U. praestans. Herbarium specimens of hybrid 'Superba' vary, however, suggesting that, in addition to Morren's U. montana superba, more than one U. × hollandica cultivar was given the name (see 'External links' below).
