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Ulmus 'Wentworthii'
''Ulmus'' 'Wentworthii', commonly known as the Wentworth Elm, is a cultivar with a distinctive weeping habit which appears to have been introduced to cultivation towards the end of the 19th century. A putative hybrid, little is known of its history; indeed, the tree is not mentioned in either Elwes & Henry's 〔Elwes, H. J. & Henry, A. (1913). ''The Trees of Great Britain & Ireland''. Vol. VII. pp 1848-1929. Private publication. ()〕 or Bean's 〔Bean, W. J. (1981). ''Trees and shrubs hardy in Great Britain'', 7th edition. Murray, England.〕 classic works on British trees. The earliest known references are German and Dutch, the first by de Vos 〔de Vos, C. ''Handboek'', Supplement, 16, 1890.〕 in 1890. At about the same time, the tree was offered for sale by the Späth nursery 〔Späth nursery, Catalogue 143, p. 135, 1910-11. Berlin, Germany.〕 of Berlin, suggesting the tree was, in spite of its very English name, of German origin (see Etymology).
The only known references to the provenance of the Wentworth Elm are two found in the ''Ulmus'' 'Names' list of the Royal Botanic Garden Edinburgh, where it is identified as a hybrid of the Huntingdon Elm ''Ulmus × hollandica'' 'Vegeta' and Plot's Elm ''Ulmus minor'' var. ''plotii'' (RBGE ref. no. 32931). However, the Royal Botanic Garden specimen bore no trace of Plot's elm parentage in either form or leaf. Melville dismissed the ''Wentworthii Pendula'' growing at the Royal Botanic Gardens, Kew as simply ''U. × vegeta'' 〔Green, P. S. (1964). Registration of cultivar names in Ulmus. ''Arnoldia'', Vol. 24. Arnold Arboretum, Harvard University〕 ().
==Description==
The mature Wentworth Elm in the Royal Botanic Garden Edinburgh was a graceful, bell-shaped tree with a straight bole clear to 3 metres with latticed bark typical of 'Vegeta', supporting fan-shaped arching branches, the outer ones pendulous. The leaves were similar to 'Vegeta' in shape and texture but much larger, up to 18 cm () long.〔Photograph of 'Wentworth' leaves in Kew in Gerald Wilkinson, ''Epitaph for the Elm'', Hutchinson, London 1978 (ISBN 0099212803 / 0-09-921280-3)〕 The tightly-clustered, apetalous wind-pollinated flowers are bright red, and appear in early spring.
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