Ulmus pumila 'Aurescens'

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Ulmus pumila 'Aurescens'
'Aurescens' spring foliage
SpeciesUlmus pumila
Cultivar'Aurescens'
OriginGermany

The

Ili valley, Turkestan (then a region of Russia, now part of Kazakhstan) by the lawyer and amateur naturalist Vladislav E. Niedzwiecki while in exile there.[1][2] Dieck originally named the tree U. pinnato-ramosa f. aurescens.[3]

Description

'Aurescens' is distinguished by its golden leaves on emergent shoots in spring; the foliage reverts to dark green by summer.[1]

  • Leaf, in September
    Leaf, in September
  • Bute Park tree in spring
    Bute Park tree in spring
  • Bute Park tree in winter
    Bute Park tree in winter

Pests and diseases

This cultivar has not been scientifically tested for Dutch elm disease resistance, however several old specimens have survived unscathed by the disease in the UK. (see Notable trees).

Cultivation

The tree is rare in Europe and unknown in North America and Australasia. In trials in England, it quickly perished where grown on winter-waterlogged ground.[4]

Notable trees

Two mature specimens are known in the UK: one at Bute Park Arboretum, Cardiff, planted c. 1980, height 15 m × 65 cm d.b.h. in 2004; another grows in a private garden at Seaford, East Sussex (see Accessions).[5]

Accessions

Europe

Nurseries

Europe

References

  1. ^ a b Dieck, G. (1894). Neuheiten-Offerten des National-Arboretums zu Zöschen bei Merseburg, 1894/95.
  2. ^ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. 24 (6–8). Arnold Arboretum, Harvard University: 41–80. Retrieved 16 February 2017.
  3. ^ Brookes, A. H. (2015). Great Fontley Elm Trial, 2015 Report. Butterfly Conservation, Lulworth, UK.
  4. ^ "List of plants in the {elm} collection". Brighton & Hove City Council. Retrieved 23 September 2016.