tree is susceptible to Dutch elm disease (DED). Cultivation 'Wentworthii Pendula' is extremely rare in cultivation. De Vos dismissed the tree as "one we can do without. As ornamentals, U. pitteurs pendula [:Zelkova × verschaffeltii ] and U. suberosa pendula [:U. 'Lombartsii' ] are far prettier, and as a (weeping) arbor U. montana pendula [:U. glabra 'Horizontalis' ] is by far the most beautiful". Späth, though he used Ulmus montana for both Wych Elm cultivars and, more rarely, for those of U. × hollandica, listed the tree from 1890 to 1902 simply as Ulmus Wentworthi pendula, then from 1903 to 1910 as a Field Elm cultivar, Ulmus campestris Wentworthi pendula or Ulmus campestris wentworthiensis, despite its hybrid leaf and samara. The tree is absent from his post-war catalogues. The specimens held at Kew Gardens and the Royal Botanic Garden Edinburgh succumbed to DED towards the end of the 20th century. The latter was one of the very few RBGE elms to keep its old cultivar name in Melville's wholesale "scientific" revision of elm nomenclature and taxonomy there in 1958. In 2016 two old plantings were discovered elsewhere in Edinburgh (see Notable Trees below), and are the only survivors known worldwide. Exported to North America, one specimen, probably sourced from Späth, was planted at the Dominion Arboretum, Ottawa, in 1897, while the tree featured in the early 20th-century catalogues of the Bobbink and Atkins nursery, Rutherford, New Jersey. The Wentworth Elm is not known to have been introduced to Australasia. Notable trees Two old Wentworth Elms, with girths over , believed to have been planted c.1909, stand in the gardens of Holyrood Palace, Edinburgh (2016), on the main lawn to the east of the palace. Two of the three specimens supplied to the RBGE by Späth in 1902, the taller is about in height; the shorter was lightly pruned c.2015. A third tree at Holyrood Palace was felled in 2008 due to Dutch Elm Disease and a ring count indicated an origin of approximately 1905. Despite the dearth of textbook descriptions, the trees were confidently identified as 'Wentworthii Pendula' in a RBGE survey (2016), because their leaves and branchlets match old photographs of the type and because no other large-leaved weeping hybrid elm appears in the cultivar lists of the time. Their lower branchlets 'routinely touch the ground' and are kept trimmed, as was the case with the 'Wentworthii Pendula' at