Ulmus 'Toledo'
| Ulmus hybrid | |
|---|---|
| Cultivar | 'Toledo' |
| Origin | Spain |
The elm cultivar Ulmus 'Toledo' was raised from seed collected in 1999 from a tree believed to be Ulmus minor growing in the eponymous city by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid. 'Toledo' was 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 2.9 / 5. [1] However, DNA analysis later revealed that 'Toledo' had Siberian Elm Ulmus pumila in its ancestry, which disqualified it from use in Spanish forestry.
Description
'Toledo' grew at a comparatively fast rate of 89 cm per annum in the trials at Puerta de Hierro, Madrid. The erect branches form an irregular crown and are devoid of corky tissue. The leaves, on 6 mm petioles, are ovate, typically oblique at the base and acuminate at the apex, the average length and width 47 × 27 mm, the margins doubly serrate. Foliar density relative to 'Sapporo Autumn Gold' is described as 'high'. [1]