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