| 词条 | Ulmus pumila 'Aurescens' |
| 释义 |
| name = Ulmus pumila 'Aurescens' | species = Ulmus pumila | cultivar = 'Aurescens' | image = U. pumila 'Aurescens' foliage, April 2015.jpg | image_caption = 'Aurescens' spring foliage | origin = Germany }} The Ulmus pumila cultivar '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-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] Pests and diseasesThis 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). CultivationThe 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 treesTwo 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
NurseriesEurope
References1. ^1 Dieck, G. (1894). Neuheiten-Offerten des National-Arboretums zu Zöschen bei Merseburg, 1894/95. {{Elm species, varieties, hybrids, hybrid cultivars and species cultivars |state=collapsed}}{{tree-stub}}2. ^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. {{ISBN|9781153197953}} 3. ^{{cite journal |last=Green |first=Peter Shaw |authorlink=Peter Shaw Green |date=1964 |title=Registration of cultivar names in Ulmus|url=https://archive.org/stream/arnoldiaarno_21#page/40/mode/2up/|journal=Arnoldia |volume=24|pages=41–80 |number=6–8 |publisher=Arnold Arboretum, Harvard University |access-date=16 February 2017}} 4. ^Brookes, A. H. (2015). Great Fontley Elm Trial, 2015 Report. Butterfly Conservation, Lulworth, UK. 5. ^Johnson, O. (ed.). (2011). Champion Trees of Britain & Ireland. p. 171. Royal Botanic Gardens, Kew, London. {{ISBN|978-1842464526}} 6. ^{{cite web|title=List of plants in the {elm} collection|publisher=Brighton & Hove City Council|access-date=23 September 2016|url=http://www.brighton-hove.gov.uk/content/leisure-and-libraries/parks-and-green-spaces/list-plants-collection}} 3 : Siberian elm cultivar|Ulmus articles with images|Ulmus |
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