词条 | Ulmus glabra 'Insularis' | |||
释义 |
| name = Ulmus glabra 'Insularis' | species = Ulmus glabra | image = File:Ulmus glabra Huds. f. insularis.jpg | image_caption = 'Insularis' on Ven, Sweden.[1] | cultivar = 'Insularis' | origin = Sweden }} The cultivar Ulmus glabra 'Insularis' [:'island'[1]], the Ven island elm, a fastigiate form of Wych Elm from Sweden, was identified and described by Nilsson in Lustgården 30: 127. 1949, as U. glabra Huds. f. insularis.[2][3] Nilsson considered it "closely related to subspecies montana (Stokes) Lindqvist". The cultivar arose from a tree on Ven island in Öresund sound, planted c.1900 between Haken and Husvik, possibly from self-sown local seedlings, and approaching 2 m in girth by the late 1940s.[2][4] DescriptionThe tree was described by Nilsson as columnar, having a rounded elongate-ovoid crown, and dense sub-erect branches.[3] The relatively elongated leaves are widest above the middle, quite tapered towards a long tip, and tapering to an unsymmetrical base. The margin is triple-toothed.[2] New shoots are downy. Flowers and fruits as in the type. Nilsson (1949) included photographs of the original tree in winter and summer, and a leaves photo.[2] Pests and diseasesSee under Ulmus glabra. CultivationThe horticultural potential of the tree was early recognized and propagation was already under way in Sweden when Nilsson published his 1949 article.[2] The tree was sometimes planted in botanical collections.[5] Krüssmann (1984) contains a photograph of a young specimen in the Wageningen Arboretum in the Netherlands.[6] 'Insularis'-like wych elmsA narrow 'Insularis'-like wych elm that stands before Wright's Houses, Bruntsfield Links, Edinburgh (2018), may pre-date the cultivation of the Swedish clone.[7] Despite being an unpollarded open-grown tree, its branches are mostly steeply ascending. Leaves and samarae are typical of the species. References1. ^{{cite book|last1=Lewis|first1=Charlton Thomas|title=An elementary Latin dictionary|date=1891|publisher=Harper & brothers|location=New York|page=428|url=https://archive.org/stream/elementarylatind01lewi#page/428/mode/2up|accessdate=14 February 2018}} {{Elm species, varieties, hybrids, hybrid cultivars and species cultivars |state=collapsed}}2. ^1 2 3 4 5 {{cite journal|last1=Nilsson|first1=Arvid|title=Venalmen, Ulmus glabra Huds. f. insularis n. f.|journal=Lustgården|date=1949|volume=30|pages=125-129|url=https://dendrologerna.kultursupport.se/download/VvJ4openzDe7Az1X#page=128|accessdate=13 February 2018|trans-title=The Ven elm, Ulmus glabra Huds. f. insularis n. f.}} 3. ^1 {{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. ^Krüssman, Gerd, Manual of Cultivated Broad-Leaved Trees & Shrubs (1984 vol. 3) 5. ^[https://dendrologerna.kultursupport.se/attachments/Lustgarden_v05/Lustgarden_1964-1965_v05_MAX.pdf#page=38 1964 photo of 'Insularis', Sweden, Lustgården, 1964-65, p.38] 6. ^Krüssman, Gerd, Manual of Cultivated Broad-Leaved Trees & Shrubs (1984 vol. 3, plate 145) 7. ^Possible 'Insularis' on Bruntsfield Links (second tree from left; Huntingdon Elm on left for comparison): eyeonedinburgh.net 3 : Wych elm cultivar|Ulmus articles with images|Ulmus |
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