Cultivar 'Dehesa de la Villa' | Origin Spain | |
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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 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.
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'Dehesa de la Villa' was introduced to the UK in 2017.
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'.
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.