''Ulmus minor'' 'Dehesa de la Villa'
Ulmus minor 'Dehesa de la Villa' | |
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![]() 'Dehesa de la Villa' | |
Species | Ulmus minor |
Cultivar | 'Dehesa de la Villa' |
Origin | Spain |
The Field Elm cultivar Ulmus minor 'Dehesa de la Villa' was cloned by root cuttings from a tree growing in the eponymous park within the Moncloa-Aravaca district of north-west Madrid (40°27′29″N 3°44′0″W / 40.45806°N 3.73333°W),[1] by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid in 1990. 'Dehesa de la Villa' is one of a number of cultivars found to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the hybrid cultivar 'Sapporo Autumn Gold'. In the Madrid study, the appearance of the tree was rated 4.3 / 5. [1]
'Dehesa de la Villa' 'Dehesa de Amaniel' was introduced to the UK in 2015, by Hampshire & Isle of Wight Branch, Butterfly Conservation, as part of an assessment of DED-resistant cultivars as potential hosts of the endangered White-letter Hairstreak.[2]
Description
'Dehesa de la Villa' is monopodial, growing at a comparatively modest rate of 63 cm per annum in the trials at Puerta de Hierro, Madrid. The branches are devoid of corky tissue. The leaves, on 6 mm petioles, are elliptic, typically oblique at the base and acuminate at the apex, the average length and width 55 × 36 mm, the margins doubly serrate. Foliar density relative to 'Sapporo Autumn Gold' is described as 'high'. [1]
Cultivation
The cultivar is undergoing further trials in a different environment in Spain, where it was tested by inoculation in 2016. If resistance is still satisfactory, the tree will be released to commerce under licence.
Accessions
- Grange Farm Arboretum, Sutton St James, Lincolnshire. One small whip planted 2017.
- Great Fontley Farm, nr. Fareham, Hampshire. Butterfly Conservation elm trial plantation. One small whip planted 2017.
References
- 1 2 3 Martín, JA; Solla, A; Venturas, M; Collada, C; Domínguez, J; Miranda, E; Fuentes, P; Burón, M; Iglesias, S; Gil, L (2015-04-01). "Seven Ulmus minor clones tolerant to Ophiostoma novo-ulmi registered as forest reproductive material in Spain". iForest - Biogeosciences and Forestry. Italian Society of Sivilculture and Forest Ecology (SISEF). 8 (2): 172–180. doi:10.3832/ifor1224-008. ISSN 1971-7458.
- ↑ Brookes, A. H. (2017). Great Fontley Elm Trial, 2017 Report. Butterfly Conservation, Lulworth, England.