Ulmus 'Regal'
From Wikipedia, the free encyclopedia
| Ulmus hybrid |
|---|
| Hybrid parentage |
| U. pumila × ('Commelin' × (U. pumila × 'Hoersholmiensis')) |
| Cultivar |
| 'Regal' |
| Origin |
| USA |
'Regal' is an American hybrid cultivar developed by the University of Wisconsin-Madison and released in 1983. Raised by the United States National Arboretum, 'Regal' shares the same complex ancestry as 'Homestead', and 'Urban', being derived from the crossing of the Siberian Elm Ulmus pumila with ('Commelin' × (Ulmus pumila × 'Hoersholmiensis')). 'Regal' has an upright columnar form similar to 'Commelin', making it particularly suitable for street planting [1] [2].
The tree has a high resistance to Dutch elm disease [3], 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. However, in areas where the elm leaf beetle Xanthosalenica luteola is prevalent, much damage has been sustained.
In Europe, 'Regal' is grown under licence as one of the Resista series [2] and has enjoyed modest success in Germany as a street tree [3]. The tree also featured in trials in New Zealand during the 1990s at the Hortresearch station, Palmerston North.
Contents |
[edit] Hybrid cultivars
[edit] Arboreta etc. accessions
[edit] North America
- Chicago Botanic Garden, Glencoe, Illinois. 3 trees, no other details available.
- Holden Arboretum acc. no. 85-189
[edit] Europe
- Brighton & Hove City Council, UK, NCCPG Elm Collection [4]
- Cambridge Botanic Garden [5], University of Cambridge, UK, no accession details available.
- Royal Horticultural Society Harlow Carr Arboretum [6], Harrogate, UK, no accession details available.
[edit] Nurseries
- North America
- Johnson's Nursery [7], Menomonee Falls, Wisconsin
- Klyn Nurseries [8], Perry, Ohio.
- Lake County Nursery [9], Perry, Ohio.
- Europe
- Bonte Hoek kwekerijen [10], Glimmen, Netherlands.
- Conrad Appel, Darmstadt, Germany
- Eisele GmbH & Co KG Darmstadt, Germany.
- Golden Hill Plants [11], Marden, Kent, UK
[edit] References
- ^ 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.
- ^ 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.
[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.
