Ulmus minor 'Hoersholmiensis'

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Ulmus minor
RN Ulmus minor Hoersholmiensis (bernard zweerskade amsterdam).jpg
'Hoersholmiensis', Amsterdam.
Cultivar 'Hoersholmiensis'
Origin Hørsholm, Denmark

The Field Elm cultivar Ulmus minor 'Hoersholmiensis' [3] is believed to have originated in the Hørsholm Planteskole, Denmark, c. 1885 and was propagated by the Nielsen nursery in Hørsholm.[1]

Description[edit]

The tree has an upright habit and rapid growth. The leaves are lanceolate or narrowly obovate, acuminate at the tip and with a cuneate base, clear green in colour,[2] turning a deep yellow in autumn.[3]

Pests and diseases[edit]

'Hoersholmiensis' is susceptible to Dutch elm disease and Coral-spot Fungus Nectria cinnabarina.

Cultivation[edit]

Fine specimens can be seen in Stockholm, in Raoul Wallenberg square and the Karlaplan.[4] The tree was planted in the Netherlands, notably along the Westlandsgracht in Amsterdam where it still survives, although upper branches are often killed by Coral-spot Fungus.

Hybrid cultivars[edit]

The tree was hybridized with 'Commelin' and U. pumila as part of the Dutch elm breeding programme at the De Dorschkamp Institute, Wageningen. Seeds arising from the crossing were donated by Hans Heybroek to the University of Wisconsin-Madison programme in 1960. The clone 'Regal' was a frost-hardy selection from the resultant seedlings, whilst the later 1984 USDA release 'Homestead' arose from the crossing of another with U. pumila.

Synonymy[edit]

  • Ulmus carpinifolia 'Hoersholm': Krüssmann, Handbuch der Laubgehölze 2: 534, 1962
  • Ulmus carpinifolia 'Hoersholmensis': Meded. Comite Best. Iepenz, 13: 10, 1933
  • Ulmus carpinifolia 'Hoersholmii': Plant Buyer's Guide, ed. 6, 285, 1958
  • Ulmus carpinifolia var. horsholmii: Melville, Journal of the Linnean Society of London, Botany, 53: 88, 90. 1946

Accessions[edit]

Europe[edit]

Nurseries[edit]

Europe[edit]

References[edit]

  1. ^ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017. 
  2. ^ Bean, W. J. (1980) Trees and shrubs hardy in Great Britain (8th edition). Murray, UK.
  3. ^ Photograph of autumn colouring of 'Hoersholmiensis' in Kista, Sweden, www.tradgardsakademin.se - photo 4 [1].
  4. ^ Photographs of 'Hoersholmiensis' in Raoul Wallenberg square and the Karlaplan, Stockholm, www.tradgardsakademin.se [2].
  5. ^ Centrum voor Botanische Verrijking vzw: Voorraadlijst, accessdate: November 2, 2016