Regal (elm hybrid)
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The American Regal elm is a hybrid cultivar developed by the University of Wisconsin. The Regal hybrid shares the same parentage as the Homestead hybrid, raised by the U. S. National Arboretum, and Urban, from the crossing of the Siberian Elm U. pumila with (Commelin × (U. pumila × U. minor Hoersholmiensis)). Regal has an upright columnar form similar to Commelin, making it particularly suitable for street planting. The tree has a high resistance to Dutch elm disease, and performed particularly well in the Northern Arizona University trials [1] where, along with Frontier, it proved very tolerant of the hot and arid conditions in the eastern part of Arizona, exhibiting minimal leaf scorch. In areas where the elm leaf beetle Xanthosalenica luteola is prevalent, much damage has been sustained.
In Europe, Regal is grown under licence by the Conrad Appel nursery in Darmstadt, Germany, and has enjoyed modest success in Germany as a street tree [2]. It was also marketed for a time by nurseries in England but was withdrawn circa 2000 owing to poor demand. The tree has also been featured in trials in New Zealand during the 1990s at the Hortresearch station, Palmerston North.
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[edit] Arboreta etc. accessions
[edit] North America
- Holden Arboretum acc. no. 85-189
[edit] Europe
- Brighton & Hove City Council, UK, NCCPG Elm Collection [3]
- Royal Horticultural Society Harlow Carr Arboretum [4],Harrogate, UK.
[edit] Nurseries
[edit] North America
[edit] Europe
[edit] Synonymy
None.
[edit] References
- 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.
- Santamour, J., Frank, S. & Bentz, S. (1995). Updated checklist of elm (Ulmus) cultivars for use in North America. Journal of Arboriculture, 21:3 (May 1995), 121-131. International Society of Arboriculture, Champaign, Illinois, USA.
- Smalley, E. B. & Lester, D. T. (1983), HortScience 18: 960-961, 1983.
[edit] External links
- http://www.extension.iastate.edu/Publications/SUL4.pdf Summary, inc. photographs, of elm cultivars resistant to Dutch elm disease available in the USA.
- http://fletcher.ces.state.nc.us/programs/nursery/metria/metria11/warren/elm.htm Warren, K., J. Frank Schmidt & Son Co. (2002). The Status of Elms in the Nursery Industry in 2000.
