Ulmus 'Recerta' is an American hybrid cultivar raised by the Wisconsin Alumni Research Foundation (WARF) as selection '196-5' from seed obtained from a Siberian Elm Ulmus pumila in Volgograd, Russia; the male parent deduced as the Field Elm Ulmus minor.[1][2]
| 'Ulmus 'Recerta' | |
|---|---|
 'Recerta' at Amerbos, Amsterdam. | |
| Genus | Ulmus |
| Hybrid parentage | U. pumila × U. minor |
| Cultivar | 'Recerta' |
| Origin | US |
Description
edit'Recerta' produces a straight, clean stem, supporting a rounded crown. The leaves are elliptic, with typically acuminate tip, the blade 6–12 cm long by 3–6.5 cm broad; the margins are doubly, if bluntly, serrate.[3]
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Leaves -
Bark
Pests and diseases
editTests in the USA found the cultivar to be only 'somewhat resistant to Dutch elm disease',[4] meanwhile evaluation in France by the Institut National de la Recherche Agronomique (INRA) confirmed the tree as only 'moderately resistant'.[5]
Cultivation
editSerious doubts as to the tree's long term culture in Europe have been expressed.[6] Although registered in 1993 as 'Recerta' by Conrad Appel KG (ceased trading 2006), of Darmstadt, Germany, the tree is not known to have ever been in commerce.
Notable trees
editA mature specimen grows in a park in the Amerbos district of north Amsterdam, planted in the early 1990s along with other elm cultivars.
Accessions
editNot known.
References
edit- ^ Maethe, H. (1985), Deutsche Baumschule, Sept. 1985, 368–369.
- ^ Vermeulen, N. (2001), Encyclopaedia of Trees & Shrubs. Fitzroy Dearborn, ISBN 1-57958-119-6
- ^ Götz, W. (1985). Die Ulme kehrt zurück. Baumschulpraxis. Nr. 12 / 85, 504–505. Aachen-Brand: Euroflora Klette Verl., Nd
- ^ Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
- ^ Pinon, J. (July 2007). "Les ormes résistants à la graphiose" [Elms resistant to Dutch Elm Disease] (PDF). Forêt-entreprise (175). Paris, France: IDF: 37–41. ISSN 0752-5974. Retrieved 26 October 2017.
- ^ Heybroek, H. M. (1986), Tuin en Landschap 8(12): 19, 1986.
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