The Ulmus pumilacultivar 'Aurescens' was introduced by Georg Dieck at the National Arboretum, Zöschen, Germany, circa 1885. Dieck grew the tree from seed collected in 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-ramosaf.aurescens.[3]
'Aurescens' is distinguished by its golden leaves on emergent shoots in spring; the foliage reverts to dark green by summer.[1]
Leaf, in September
Bute Park tree in spring
Bute Park tree in winter
Pests and diseasesedit
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).
Cultivationedit
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 treesedit
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]
Accessionsedit
Europe
Brighton & Hove City Council, UK, NCCPG Elm Collection.[6] One tree in a private garden Seaford, East Sussex, recorded in 1995.
Bute Park Arboretum, Cardiff, UK. One tree, tag number 1907, planted c. 1980, no other accession details available.
^ abDieck, G. (1894). Neuheiten-Offerten des National-Arboretums zu Zöschen bei Merseburg, 1894/95.
^Hansen, N. How to produce that $1000 premium apple, in Minnesota State Hort. Soc. (1900). Trees, fruits & flowers of Minnesota. Vol. 28. 470-1. Forgotten Books, London, 2013. ISBN9781153197953
ulmus, pumila, aurescens, ulmus, pumila, cultivar, aurescens, introduced, georg, dieck, national, arboretum, zöschen, germany, circa, 1885, dieck, grew, tree, from, seed, collected, valley, turkestan, then, region, russia, part, kazakhstan, lawyer, amateur, na. The Ulmus pumila cultivar Aurescens was introduced by Georg Dieck at the National Arboretum Zoschen Germany circa 1885 Dieck grew the tree from seed collected in 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 Ulmus pumila Aurescens Aurescens spring foliageSpeciesUlmus pumilaCultivar Aurescens OriginGermany Contents 1 Description 2 Pests and diseases 3 Cultivation 4 Notable trees 5 Accessions 6 Nurseries 6 1 Europe 7 ReferencesDescription edit Aurescens is distinguished by its golden leaves on emergent shoots in spring the foliage reverts to dark green by summer 1 nbsp Leaf in September nbsp Bute Park tree in spring nbsp Bute Park tree in winterPests and diseases editThis 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 editThe 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 editTwo 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 editEuropeBrighton amp Hove City Council UK NCCPG Elm Collection 6 One tree in a private garden Seaford East Sussex recorded in 1995 Bute Park Arboretum Cardiff UK One tree tag number 1907 planted c 1980 no other accession details available Grange Farm Arboretum Sutton St James Spalding Lincolnshire UK As U pumila var arborea Aurescens Acc no 1092 Wijdemeren City Council Netherlands Elm collection Planted Overmeerseweg Nederhorst den Berg 2015 Nurseries editEurope edit Noordplant 1 Glimmen Netherlands References edit a b Dieck G 1894 Neuheiten Offerten des National Arboretums zu Zoschen bei Merseburg 1894 95 Hansen N How to produce that 1000 premium apple in Minnesota State Hort Soc 1900 Trees fruits amp flowers of Minnesota Vol 28 470 1 Forgotten Books London 2013 ISBN 9781153197953 Green Peter Shaw 1964 Registration of cultivar names in Ulmus Arnoldia Arnold Arboretum Harvard University 24 6 8 41 80 Retrieved 16 February 2017 Brookes A H 2015 Great Fontley Elm Trial 2015 Report Butterfly Conservation Lulworth UK Johnson O ed 2011 Champion Trees of Britain amp Ireland p 171 Royal Botanic Gardens Kew London ISBN 978 1842464526 List of plants in the elm collection Brighton amp Hove City Council Retrieved 23 September 2016 nbsp This tree related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Ulmus pumila 27Aurescens 27 amp oldid 1013867405, wikipedia, wiki, book, books, library,
