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Ulmus minor 'Majadahonda' : ウィキペディア英語版 | Ulmus minor 'Majadahonda'
The Field Elm cultivar ''Ulmus minor'' 'Majadahonda' was cloned by grafting scions from a tree found growing in the suburb of Majadahonda, 16 km north-west of Madrid, by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid in 1993. The tree is one of seven discovered 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 4.1 / 5. 〔Martin, J. et al. (2013). Seven Iberian Ulmus minor clones resistant to Dutch elm disease registered for their use as forest reproductive material. ''Journal of Biogeosciences & Forestry'', Vol. 8 pp172–180. Italian Society of Silviculture & Forest Ecology (SISEF).()〕 The other Spanish cultivars are: Ademuz, Dehesa de Amaniel, Dehesa de la Villa, Fuente Umbria, Retiro, Toledo. ==Description== 'Majadahonda' grew at a modest rate of 61 cm per annum in the trials at Puerta de Hierro, Madrid. The branches, devoid of corky tissue, form a rounded crown. The leaves, on comparatively long 11 mm petioles, are elliptic, typically oblique at the base and acuminate at the apex, the average length and width 50 × 29 mm, the margins distinctively simply serrate. Foliar density relative to 'Sapporo Autumn Gold' is described as 'high'. 〔
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