''Ulmus'' 'Den Haag'
| Ulmus hybrid cultivar | |
|---|---|
 'Den Haag', Preston Park, Brighton | |
| Hybrid parentage | U. pumila × 'Belgica' |
| Cultivar | 'Den Haag' |
| Origin | The Netherlands |
The hybrid cultivar Ulmus 'Den Haag' is a Dutch development derived from a crossing of the Siberian Elm Ulmus pumila and the Belgian Elm Ulmus × hollandica 'Belgica' in 1936 by S. G. A. Doorenbos (1891-1980), Director of Public Parks in The Hague.[1]
Description
The tree is distinguished by its pendent branches, and its foliage, which is creamy-white on emergence but turning lime-green and ultimately deep green by midsummer.[2]
'Den Haag' leaf
Den Haag', Sir Harold Hillier Gardens, UK
Elm cultivars, Nether-lands; 'Den Haag' far right of picture
Pests and diseases
Although reputed to be moderately resistant to Dutch elm disease, drought, and frost, the tree has brittle branches, and is vulnerable to Coral-spot Fungus Nectria cinnabarina [3]
Cultivation
The tree remains in commerce in the Netherlands and New Zealand. 'Den Haag' is not known to have been introduced to North America.
Notable trees
The UK TROBI Champion grows at Preston Park in Brighton, measuring 14 m high by 77 cm d.b.h. in 2009. [4]
Etymology
The tree is named for the city of Den Haag (known as The Hague in English).
Synonymy
- Ulmus 'Ieplaan': old (original?) name for Ulmus 'Den Haag'.
- Ulmus pumila 'Den Haag': various authorities.
Accessions
- Europe
- Brighton & Hove City Council, UK, NCCPG Elm Collection.[5] Large tree in Preston Park.
- Grange Farm Arboretum, Sutton St James, Spalding, Lincs., UK. Acc. no. 819.
- Sir Harold Hillier Gardens, Romsey, Hampshire UK. Acc. no. 2008.0114
Nurseries
- Europe
- De Reebock , Zwalm, Belgium.
- Noordplant , Glimmen, The Netherlands.
- Australasia
- Big Trees , Nelson, New Zealand
References
- ↑ Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
- ↑ 'Den Haag' in Handbuch der Ulmengewächse, www. ulmen-handbuch.de
- ↑ Heybroek, H. M. (1986). Tuin en Landschap, 8(12): 19, 1986
- ↑ Johnson, O. (2011). Champion Trees of Britain & Ireland, p. 168. Kew Publishing, Kew, London. ISBN 9781842464526.
- ↑ "List of plants in the {elm} collection". Brighton & Hove City Council. Retrieved 23 September 2016.