The

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, ...

''Ulmus'' 'Fuente Umbria' was raised from seed collected in 1995 from an elm resembling '' Ulmus minor'' growing in a field at Fuente Umbria west of

Valencia Valencia ( va, València) is the capital of the Autonomous communities of Spain, autonomous community of Valencian Community, Valencia and the Municipalities of Spain, third-most populated municipality in Spain, with 791,413 inhabitants. It is ...

(), by researchers at the Escuela Técnica Superior de Ingenieros de Montes,

Universidad Politėcnica de Madrid The Technical University of Madrid or sometimes called Polytechnic University of Madrid ( es, Universidad Politécnica de Madrid, UPM) is a public university, located in Madrid, Spain. It was founded in 1971 as the result of merging different Te ...

. 'Fuente Umbria' is one of seven cultivars found to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the

hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two dif ...

'Sapporo Autumn Gold'. However, retrospective DNA analysis has revealed that the clone has ''

Ulmus pumila ''Ulmus pumila'', the Siberian elm, is a tree native to Asia. It is also known as the Asiatic elm and dwarf elm, but sometimes miscalled the 'Chinese Elm' (''Ulmus parvifolia''). ''U. pumila'' has been widely cultivated throughout Asia, Nor ...

'' DNA, the species introduced to Spain at the end of the 16th century, and has consequently been dropped from the programme.Brookes, A. H. (2020). ''Great Fontley Elm Trial, 2020 Report''. Butterfly Conservation, Lulworth, UK. 'Fuente Umbria' was introduced to the UK in 2017, by Hampshire & Isle of Wight Branch, ''

Butterfly Conservation Butterfly Conservation (BC) is a UK-wide nonprofit environmentalist organization and charity dedicated to conserving butterflies, moths, and the environment. The charity uses its research to provide advice on how to conserve and restore butterfly ...

'', as part of an assessment of DED-resistant cultivars as potential hosts of the endangered White-letter Hairstreak.

Description

'Fuente Umbria' is comparatively slow growing, achieving a rate of 52 cm per annum in the trials at Puerta de Hierro, Madrid. The branches, which have corky tissue, are erect, forming an irregular crown. The leaves, on 10 mm petioles, are ovate, typically acuminate at the apex, the average length and width 76 × 45 mm, the margins doubly serrate. Foliar density relative to 'Sapporo Autumn Gold' is described as 'medium'. The leaves are the first to flush of the seven Madrid clones where grown in southern England, in mid March.

Cultivation

The cultivar has been evaluated at four sites across Spain, while specimens were planted in England in 2017 at

's elm trial plantations in

Hampshire Hampshire (, ; abbreviated to Hants) is a ceremonial county, ceremonial and non-metropolitan county, non-metropolitan counties of England, county in western South East England on the coast of the English Channel. Home to two major English citi ...

, and at

Grange Farm Arboretum The Grange Farm Arboretum is a small private arboretum comprising 3 hectares accommodating over 800 trees, mostly native and ornamental species or cultivars, notably oaks, ashes, walnuts and elms, growing on a calcareous loam.Ostler, J. (2009) ' ...

Lincolnshire Lincolnshire (abbreviated Lincs.) is a county in the East Midlands of England, with a long coastline on the North Sea to the east. It borders Norfolk to the south-east, Cambridgeshire to the south, Rutland to the south-west, Leicestershire ...

Accessions

Europe

*Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 1266. One small whip planted 2017.

References

{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars , state=collapsed Hybrid elm cultivar Ulmus articles with images Ulmus Technical University of Madrid elm clones