Ulmus glabra 'Insularis'

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Ulmus glabra 'Insularis'
Ulmus glabra Huds. f. insularis.jpg
'Insularis' on Ven, Sweden.[1]
SpeciesUlmus glabra
Cultivar'Insularis'
OriginSweden

The cultivar Ulmus glabra 'Insularis' [:'island'[2]], 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.[1][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.[1][4]

Description[]

The 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.[1] 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.[1]

Pests and diseases[]

See under Ulmus glabra.

Cultivation[]

The horticultural potential of the tree was early recognized and propagation was already under way in Sweden when Nilsson published his 1949 article.[1] 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 elms[]

A 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.

  • Bruntsfield Links wych, Edinburgh (April, 2016)

  • Same (October 2016)

  • Leaves of same

References[]

  1. ^ a b c d e f Nilsson, Arvid (1949). "Venalmen, Ulmus glabra Huds. f. insularis n. f." [The Ven elm, Ulmus glabra Huds. f. insularis n. f.]. Lustgården. 30: 125–129. Retrieved 13 February 2018.
  2. ^ Lewis, Charlton Thomas (1891). An elementary Latin dictionary. New York: Harper & brothers. p. 428. Retrieved 14 February 2018.
  3. ^ a b Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017.
  4. ^ Krüssman, Gerd, Manual of Cultivated Broad-Leaved Trees & Shrubs (1984 vol. 3)
  5. ^ 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 [1]
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