Ulmus glabra 'Cornuta'

Ulmus glabra
Details
Cultivar	'Cornuta'
Origin	Europe

The Wych Elm Ulmus glabra cultivar 'Cornuta' is a little-known tree, finally identified as a cultivar of U. glabra by Boom [2] in Ned. Dendr. 1: 157, 1959.^[1]

Description

'Cornuta' is distinguished only by the one or two cusp-like lobes either side of the apex of the leaf on strong-growing shoots, similar to Ulmus laciniata ^[2]

Pests and diseases

A cultivar of the Wych Elm, 'Cornuta' is susceptible to Dutch Elm disease. A specimen at the Ryston Hall [3], Norfolk, arboretum, obtained from the Späth nursery (as U. triserrata) before 1914,^[3] was killed by the earlier strain of Dutch elm disease prevalent in the 1930s.

Cultivation

A very large tree survives at Meise, in Belgium; measured in 2002, it had attained a height of 35 m, and a d.b.h. of @ 1.2m. Another survives along a canal in Amsterdam. 'Cornuta' is not known to be in commerce.

Accessions

North America

• Dominion Arboretum, Canada. Details not known.

Europe

• Brighton & Hove City Council, UK, NCCPG elm collection [4], 1 tree, at Sussex University.
• Hortus Botanicus Nationalis, Salaspils, Latvia. Acc. no. 18114,5,6,7.
• National Botanic Garden [5]., Belgium. Details not known.

Synonymy

• Horned Elm: origin obscure
• Ulmus campestris cornuta: David, Revue Hort. II. 4: 102, 1845.
• Ulmus corylacea var. grandidentata: Dumortier, Fl. Belg., 25, 1827.
• Ulmus intermedia Hort.: Kirchner[6], in Petzold[7] & Kirchner, Arb. Muscav., 565, 1864, as name in synonymy.
• Ulmus Montana (: glabra) var. corylifolia: Zapalowicz[8], Conspectus Florae Galiciae Criticus 2: 98, 1908.
• Ulmus Montana (: glabra) f. lobata: Waisbecker [9], Oesterr. Bot. Zeitschr. 49: 67, 1899.
• Ulmus Montana (: glabra) var. superba: Lavallée [10] Arb. Segrez. 237, 1877.
• Ulmus triserrata Hort. ex Dippel

References

1. ^ Green, P. S. (1964). Registration of cultivar names in Ulmus. Arnoldia, Vol. 24. Arnold Arboretum, Harvard University. [1]
2. ^ Bean, W. J. (1981). Trees and shrubs hardy in Great Britain, 7th edition. Murray, London.
3. ^ Ryston Hall Arboretum catalogue, circa 1920

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