Ulmus 'Lobel'

Infobox Cultivar
color = lightgreen
name = "Ulmus" hybrid


image_caption = 'Lobel' elms, East Street, Brighton, UK.
hybrid = ('Exoniensis' × "U. wallichiana") × ('Bea Schwarz' selfed)
cultivar = 'Lobel'
origin = Wageningen, The Netherlands

A Dutch hybrid cultivar raised at Wageningen, 'Lobel' was derived from a crossing of clone 202 ("U. glabra" 'Exoniensis' × "U. wallichiana") with 336 ("U." 'Bea Schwarz', selfed), cloned in 1962 and released for sale in 1973.

Description

'Lobel' is a fastigiate, small-crowned, tree not unlike the pyramidal Hornbeam "Carpinus betulus" 'Fastigiata'.Heybroek, H. M. (1983). Resistant Elms for Europe. In Burdekin, D. A. (Ed.) Research on Dutch elm disease in Europe. "For. Comm. Bull." 60. pp 108 - 113.] Heybroek, H. M. (1993). The Dutch Elm Breeding Program. In Sticklen & Sherald (Eds.) (1993). "Dutch Elm Disease Research", Chapter 3. Springer Verlag, New York, USA] . The typically acuminate leaves are < 11 cm long by 7 cm broad, and notably late to flush, rarely before mid-May Santini, A., Fagnani, A., Ferrini, F., Ghelardini, L., & Mittempergher, L. (2005). Variation among Italian and French elm clones in their response to Ophiostoma novo-ulmi inoculation. "Forest Pathology", 25 (2005), 183-193, Blackwell Verlag, Berlin] .

Pests and diseases

Like its Dutch contemporaries 'Dodoens' and 'Plantyn' 'Lobel' has proven no more than marginally resistant to the new, more virulent, strain of Dutch elm disease.

Cultivation

Planting is no longer recommended wherever the disease is prevalent.Burdekin, D. A. & Rushforth, K. D. (Revised by Webber J. F. 1996). Elms resistant to Dutch elm disease. "Arboricultural Research Note" 2/96. Arboricultural Advisory and Information Service, Alice Holt, Farnham, UK. ] , and sales in the Netherlands declined from over 12,000 in 1989 to 1,100 in 2004Hiemstra, J.A. et al. (2007) "Belang en toekomst van de iep in Nederland". Praktijkonderzoek Plant & Omgeving, Wageningen UR, Netherlands.] [http://www.deboomkwekerij.nl/tsde/resources/attachments/download/true/im/false/id/69628/Iep.pdf] .

'Lobel' is particularly resistant to sea winds, and was accordingly planted in large numbers by Portsmouth City Council in the late 1980s, notably to replace the ancient Huntingdon Elms lost in the Great Storm of 1987 along the Ladies' Mile on Southsea Common. There are also large plantings at Ealing and Primrose Hill, London, Brighton & Hove, and Havant. 'Lobel' was included in trials [http://www.netspace.net.au/~stephenf/Resistant_Elms.html] in Canberra, Australia started in 1988 but has not thrived in that environment. It is not known to have been commercially released in North America, although it was evaluated at the Iowa State University in the 1970sGibbs, J. N., Brasier, C. M., McNabb Jnr., H.S., and Heybroek, H. M. (1975). Further studies on the pathenogenicity in Ceratocystis ulmi. "Europ. Journ. Forest. Path." 5 (3): 161-174.] and may still survive there.

Etymology

The tree is named for Matthias de L'obel, the Flemish botanist also commemorated by the genus Lobelia.

Accessions

Europe

*Arboretum de La Petite Loiterie [http://lapetiteloiterie.free.fr/html/presentation/especes.html] , Monthodon, France. No details available
*Brighton & Hove City Council, UK, NCCPG Elm Collection
*Royal Botanic Gardens Kew, UK, acc. no. 1980.729

Nurseries

Europe

*Barcham Trees [http://barcham.co.uk/taxonomy/term/94] , Ely, Cambs., UK
*Bellwood Trees [http://www.bellwoodtrees.com/index.php] , Meigle, Perthshire, Scotland, UK
*De Reebock [http://www.dereebock.be] , Zwalm, Belgium
*Dulford Nurseries [http://www.dulford-nurseries.co.uk] , Cullompton, Devon, UK
*Johan Van Herreweghe [http://www.jvh-nurseries.com] , Schellebelle, Belgium.
*Lorenz von Ehren [http://lve.ulmer.de/TUlEPTUwOTY4.html?UID=BEA9FD32B9D84066636F075F113998FB30EF481B64C697] , Hamburg, Germany
*PlantenTuin Esveld [http://www.esveld.nl/catalen/heestersu.htm#ulmus] , Boskoop, Netherlands.
*UmbraFlor [http://www.umbraflor.it] , Spello, Italy
*Westerveld Boomkwekerij B.V. [http://www.westerveldbv.nl/] , Opheusden, Netherlands

References